CN107181159A - All -fiber passive Q regulation pulse optical fiber laser - Google Patents

Abstract

Based on the principle of dual-cavity coupling, the present invention realizes an integrated all-fiber passive Q-switched pulsed fiber laser through in-band pumping, fully utilizes the wide absorption bandwidth and emission bandwidth of the doped gain fiber, and there is a considerable overlap between the two range characteristics, the working band of the resonator is reasonably designed, and the dual functions of laser radiation gain and saturation absorption are realized in the doped gain fiber. The radiation laser of the first resonator is used to pump the second resonator, and the coupling cavity is realized. All-fiber integrated passive Q-switched pulsed fiber laser. At the same time, the difference between the core diameter of the second resonant cavity doped gain fiber and the first resonant cavity doped gain fiber is used to increase the energy density of the laser in the second resonant cavity doped gain fiber and improve the passive saturable absorber. Bleach switch ability. The pulsed fiber laser of the present invention has compact structure and stable performance, and truly realizes the all-fiberization of the pulsed fiber laser.

Description

All-fiber passively Q-switched pulsed fiber laser

technical field

The invention relates to the fields of laser technology and optical fiber technology, in particular to an all-fiber passive Q-switched pulse fiber laser.

Background technique

As we all know, fiber laser has been widely concerned and welcomed by industrial users due to its unique integrated integration, good beam quality, stable performance, high efficiency, large heat dissipation area, long life and easy mass production. Fiber lasers have achieved rapid development and popularization, and have been widely used in consumer electronics, new energy, biomedicine, laser microprocessing and other fields.

At present, the pulsed fiber lasers widely used in the industry are basically active Q-switched fiber lasers. Fiber-coupled acousto-optic modulation devices (spatial acousto-optic devices) are used as optical switches, which are connected to the fiber laser resonator to modulate the intracavity loss of the laser. Realize the pulse output of fiber laser. It is strictly inferred that such pulsed fiber lasers are not considered all-fiber integrated lasers. The diffraction efficiency of this kind of space acousto-optic device itself is about 85%, and the efficiency after dual-fiber coupling is as low as 70%. The light transmission efficiency is further reduced, which increases the insertion loss of the fiber resonator and affects the output power of the pulsed fiber laser. Furthermore, due to the optical uniformity of the acousto-optic diffraction crystal itself and the quality of the internally generated grating, the acousto-optic device not only affects the loss of the resonator, but also affects the quality of the laser beam in the cavity. Finally, the stability of the space acousto-optic device and the driving circuit also affects the working stability and life of the fiber laser. From the perspective of cost control, the high price of acousto-optic devices also increases the purchase cost of pulsed fiber lasers. In order to solve the problem of acousto-optic Q-switched pulsed fiber lasers, passive Q-switching technology is a good choice.

Traditional passive absorption devices for 10XX band lasers include Cr:YAG (chromium-doped ytterbium aluminum garnet) crystals, GaAs gallium arsenide crystals, and SESAM (semiconductor saturable absorber), etc., but these crystals themselves are spatially discrete devices, and at the same time There are disadvantages such as optical uniformity or low light damage threshold, so it is not suitable for fiber laser modulation. Recently, the saturable absorption fiber doped with Sm, Tm and other elements newly developed by researchers is not suitable for the needs of industrial pulsed fiber lasers due to unstable performance and other reasons.

Contents of the invention

Aiming at the problems existing in current pulsed fiber lasers, the present invention realizes an all-fiber passive Q-switched pulsed fiber laser through in-band pumping based on the principle of dual-cavity coupling. It has all-fiber integration, passive Q-switching, compact structure, and high efficiency. , low threshold and stable output characteristics.

Technical scheme of the present invention is realized like this:

An all-fiber passive Q-switched pulsed fiber laser, including a pump source, a pump beam combiner, a first reflector in a first resonant cavity, a second reflector in a first resonant cavity, a first reflector in a second resonant cavity, and a first reflector in a first resonant cavity Two resonant cavity second reflectors, first resonant cavity doped gain fiber, second resonant cavity doped gain fiber and mode field matcher, the output end of the pump source fiber is connected to the pump of the pump combiner end, the signal output end of the pump combiner is connected to one end of the first resonant cavity doped gain fiber, and the other end of the first resonant cavity doped gain fiber is connected to the second reflector of the first resonant cavity Mirror, the signal input end of the pump beam combiner is connected to one end of the second mirror of the second resonant cavity through the mode field matcher, and the other end of the second mirror of the second resonant cavity is connected to the One end of the second resonant cavity doped gain fiber, the other end of the second resonant cavity doped gain fiber is connected to the first reflector of the second resonant cavity, and the other end of the first reflector of the second resonant cavity is connected to The first reflector of the first resonant cavity; the first reflector of the second resonant cavity, the doped gain fiber of the second resonant cavity and the second reflector of the second resonant cavity form a second resonant cavity; the first resonant cavity The first reflector of the cavity, the second reflector of the first resonator and the doped gain fiber of the first resonator between them, the pump beam combiner, the mode field matcher, the second reflector of the second resonator , the second resonant cavity doped gain fiber and the second resonant cavity first mirror constitute the first resonant cavity;

The pump light generated by the pump source is coupled into the first resonant cavity through the pump beam combiner, and spontaneous emission is generated in the doped gain fiber of the first resonant cavity. The positive feedback of the two mirrors forms the first wavelength laser in the first resonant cavity. The first wavelength laser is located in the absorption band of the second resonant cavity doped gain fiber and is absorbed by the second resonant cavity doped gain fiber in the second resonant cavity. Spontaneously radiated light, the spontaneously radiated light in the second resonant cavity forms the second wavelength laser of the second resonant cavity through the positive feedback of the first reflector of the second resonant cavity and the second reflector of the second resonant cavity, the wavelength of the second wavelength laser greater than the wavelength of the first wavelength laser;

When the first wavelength laser generated by the first resonant cavity passes through the second resonant cavity doped gain fiber of the second resonant cavity, the second resonant cavity doped gain fiber is bleached due to saturation absorption of the first wavelength laser, and the first resonant cavity The first wavelength laser light forms pulse modulation, and the first wavelength laser light of the first resonant cavity is evolved into the first wavelength pulse laser; the first wavelength pulse laser generated by the first resonant cavity pumps the second resonant cavity doped gain fiber, in The second wavelength pulse laser output is formed in the second resonant cavity, wherein the second resonant cavity doped gain fiber serves as the gain medium of the second resonant cavity and the passive modulation saturable absorber of the first resonant cavity laser;

The wavelength of the second wavelength pulse laser output by the second resonator is longer than the wavelength of the first wavelength pulse laser of the first resonator, and the second wavelength pulse laser output by the second reflector of the second resonator of the second resonator passes through After the mode field matching device and the pump beam combiner, it is amplified by the doped gain fiber of the first resonant cavity, and then output from the second reflector of the first resonant cavity.

Further, the first reflective mirror of the first resonant cavity, the second reflective mirror of the first resonant cavity, the first reflective mirror of the second resonant cavity, and the second reflective mirror of the second resonant cavity are all reflective Bragg gratings.

Further, the first reflector of the first resonant cavity and the second reflector of the first resonant cavity are highly reflective gratings with a reflectivity greater than 99% at the working wavelength; the first reflective mirror of the second resonant cavity is A highly reflective grating with a reflectivity greater than 99%, and the second reflector of the second resonant cavity is a reflective Bragg grating with a reflectivity between 10% and 98% at the working wavelength.

Further, the pumping source is a fiber-coupled output semiconductor laser, and the wavelength range of the pumping light is between 780nm and 2000nm.

Further, the driving and control of the semiconductor laser is implemented by FPGA/CPLD, and the pumping mode is pulse mode or continuous mode.

Further, the first resonant cavity-doped gain fiber and the second resonant cavity-doped gain fiber are both single-clad or double-clad or multi-clad fibers of ytterbium-doped fiber or erbium-ytterbium co-doped fiber or thulium-doped fiber. source fiber.

Further, the geometric core diameter of the first resonant cavity doped gain fiber is not smaller than the geometric core diameter of the second resonant cavity doped gain fiber, and the numerical apertures of the two cores are the same or close.

Further, the pumping beam combiner is a wavelength division multiplexing beam combiner based on a single-mode fiber or a multimode fiber, or, the pumping beam combiner is a (1+1) made by a fusion tapered process X1 or (2+1)X1 or (N+1)X1 pump combiner.

Further, the position of the pump beam combiner is changed from between the mode field matcher and the first resonant cavity doped gain fiber to between the first resonant cavity doped gain fiber and the first resonant cavity Between the second mirrors, the output end of the pumping beam combiner is connected to the first resonant cavity doped gain fiber; or, another or more pumping sources and pumping beam combiners are provided, and multiple pumping sources and pumping The pump beam combiner constitutes bidirectional pumping or cascade pumping of the doped gain fiber in the first resonant cavity, and the wavelengths and powers of pumping lights of multiple pumping sources are the same or different.

Further, the wavelength of the first wavelength laser of the first resonant cavity is 1035nm, and the corresponding wavelength of the second wavelength laser of the second resonant cavity is 1064nm; or, the wavelength of the first wavelength laser of the first resonant cavity is 1535nm, and the wavelength of the second wavelength laser corresponding to the second resonant cavity is 1650nm.

The beneficial effects of the present invention are: the present invention is based on the principle of dual-cavity coupling, realizes an integrated all-fiber passive Q-switched pulsed fiber laser through in-band pumping, fully utilizes the wide absorption bandwidth and emission bandwidth of the doped gain fiber and The two have the characteristics of a considerable cross-overlapping range. The working band of the resonator is reasonably designed, and the dual functions of laser radiation gain and saturated absorption are realized in the doped gain fiber. The radiation laser of the first resonator is used to pump the second resonator. Cavity, through the coupling cavity to realize the all-fiber integrated passive Q-switched pulsed fiber laser. At the same time, the difference between the core diameter of the second resonant cavity doped gain fiber and the first resonant cavity doped gain fiber is used to increase the energy density of the laser in the second resonant cavity doped gain fiber and improve the passive saturable absorber. Bleach switch ability. The pulsed fiber laser of the present invention has compact structure and stable performance, and truly realizes the all-fiberization of the pulsed fiber laser.

Description of drawings

FIG. 1 is a schematic structural view of an all-fiber passively Q-switched pulsed fiber laser according to Embodiment 1 of the present invention;

2 is a schematic structural view of an all-fiber passively Q-switched pulsed fiber laser according to Embodiment 3 of the present invention;

Fig. 3 is a schematic structural diagram of an all-fiber passively Q-switched pulsed fiber laser according to Embodiment 4 of the present invention.

detailed description

In order to understand the technical content of the present invention more clearly, the following examples are given in detail, the purpose of which is only to better understand the content of the present invention but not to limit the protection scope of the present invention.

Embodiment one

As shown in Figure 1, the first embodiment is a 10xxnm all-fiber passively Q-switched pulsed fiber laser, including: 9xxnm (915nm, 920nm, 940nm, 950nm, 980nm, etc.) pump source (Pump LD) 1, pump combination Beamer (PBC) 2, the first mirror 11 of the first resonator, the second mirror 12 of the first resonator, the first mirror 21 of the second resonator, the second mirror 22 of the second resonator, the first resonator A cavity-doped gain fiber 10 , a second cavity-doped gain fiber 20 and a mode field matcher (MFA) 30 . Wherein, the pump source (Pump LD) 1 fiber output end is connected to the pump end of the pump beam combiner (PBC) 2, and the signal output end of the pump beam combiner is connected to one end of the first resonant cavity doped gain fiber 10, The other end of the first resonator-doped gain fiber 10 is connected to the second reflector 12 of the first resonator; the signal input end of the pump beam combiner is then connected to a mode field matcher (MFA) 30, and the other end of the mode field matcher Connect the second reflector 22 of the second resonant cavity, the other end of the second reflector of the second resonant cavity is connected to the second resonant cavity doped gain fiber 20, and the other end of the second resonant cavity doped gain fiber is connected to the second resonant cavity first Reflector 21, the other end of the first reflector of the second resonant cavity is connected to the first reflector 11 of the first resonant cavity.

The first mirror 11 of the first resonator, the second mirror 12 of the first resonator and all devices between them, that is, the doped gain fiber 10 of the first resonator, the pump beam combiner 2, and the mode field matcher (MFA) 30, the second reflector 22 of the second resonator, the doped gain fiber 20 of the second resonator and the first reflector 21 of the second resonator constitute the first resonant cavity.

The first reflector 21 of the second resonator, the doped gain fiber 20 of the second resonator and the second reflector 22 of the second resonator constitute the second resonator, wherein the second reflector of the second resonator is the second resonator laser output.

In this embodiment, the pump source is a fiber-coupled output semiconductor laser, and its working wavelength depends on the absorption band of the specific doped gain fiber. The wavelength range of the pump light is between 780nm and 2000nm, including 9XXnm, such as 915nm, 940nm, 950nm and 980nm.

The drive and control of the semiconductor laser in this embodiment are implemented by FPGA/CPLD, and the pumping mode can be pulsed and continuous. The output power and frequency of the pulsed fiber laser are determined by the semiconductor laser, especially under the pulsed working conditions of the semiconductor laser, the pump frequency and power determine the working frequency and output power of the fiber laser.

In this embodiment, both the first resonant cavity doped gain fiber and the second resonant cavity doped gain fiber use ytterbium-doped double-clad fiber, wherein the first resonant cavity-doped gain fiber 10 is Nufern 10/125 ytterbium-doped double-clad fiber The optical fiber, the second resonant cavity doped gain fiber 20 is Nufern 6/125 ytterbium-doped double-clad optical fiber, and other optical fiber components are made of correspondingly matched passive optical fibers.

All mirrors in this embodiment are reflective Bragg gratings (FBG), including chirped gratings and linear gratings. The first reflective mirror 11 of the first resonant cavity and the second reflective mirror 12 of the first resonant cavity are highly reflective gratings, and the reflectivity at the working wavelength of 1035nm is 99.8%; the second resonant cavity of the second resonant cavity first The reflection rate of the reflection mirror 21 at the second laser wavelength of 1064nm is 99.8%, and the reflection rate of the second reflection mirror 22 of the second resonant cavity is 80%.

In this embodiment, the wavelength of the second wavelength laser is determined by the second resonant cavity first reflector 21 of the second resonant cavity, the second resonant cavity second reflector 22 and the second resonant cavity doped gain fiber 20, and can be selected 1060nm, 1064nm, 1070nm, 1075nm and 1080nm etc. But the wavelength of the laser in the second cavity must be greater than the wavelength of the laser in the first cavity.

The 9xxnm pump light is coupled into the first resonant cavity through the pump beam combiner, and 10xxnm spontaneous emission is generated in the first resonant cavity doped gain fiber 10, which is reflected by the first mirror of the first resonant cavity and the second reflection of the first resonant cavity Mirror positive feedback forms the first resonant cavity 1035nm oscillating laser, the first wavelength laser is located in the absorption band of the second resonant doped gain fiber, and is doped by the second resonant gain fiber (ytterbium-doped gain fiber) in the second resonant cavity ) absorption to generate spontaneous emission light, and the spontaneous emission light in the second resonant cavity is positively fed back by the first reflector of the second resonant cavity and the second reflector of the second resonant cavity to generate a laser with a second wavelength of 1064nm.

When the 1035nm laser generated in the first resonant cavity passes through the doped gain medium of the second resonant cavity, the doped gain fiber of the second resonant cavity is bleached due to saturation absorption of the first wavelength laser, and forms pulse modulation on the laser of the first resonant cavity , the laser in the first resonant cavity evolves into a pulsed laser at this time. The first wavelength 1035nm pulse laser generated by the first resonator pumps the second resonator doped gain fiber to form a second wavelength 1064nm pulse laser output in the second resonator. At this time, the gain fiber of the second resonator acts as the second Dual function of resonator-doped gain fiber and passively modulated saturable absorber for first resonator laser.

The second wavelength 1064nm laser output through the second reflector 22 of the second resonator passes through the mode field matcher (MFA) and the pumping beam combiner, and after being amplified by the first resonator doped gain fiber, it is amplified from the first resonator to the second Two mirrors 12 output. At this time, the first resonant cavity doped gain fiber 10 acts as an amplifier for the 1064nm laser.

The doped gain fiber in this embodiment can also be a single-clad or multi-clad ytterbium-doped fiber.

In this embodiment, the geometric dimension of the first resonator-doped gain fiber has a core diameter of 10 microns and is not smaller than the core diameter of the second resonator-doped gain fiber of 6 microns, and the numerical apertures of the two cores are the same. The energy density of the laser in the doped gain fiber of the second resonant cavity can be increased, and the bleaching switching ability of the passive saturable absorber can be improved.

When ytterbium-doped fibers with the same core diameter are used for the first and second first resonator-doped gain fibers, the mode field matcher between them can be omitted.

In the present embodiment, the pumping structure is unidirectional pumping, and the position of the pumping beam combiner is between the mode field matcher (MFA) 30 and the first resonator doped gain fiber 10 in the accompanying drawing 1, but it can also be Located between the first resonant cavity doped gain fiber 10 and the first resonant cavity mirror HR12, no matter which direction, the pump light output end must be connected to the first resonant cavity doped gain fiber; or be provided with another or more Pumping source and pumping beam combiner, multiple pumping sources and pumping beam combiner constitute the bidirectional pumping or series pumping of the first resonant cavity doped gain fiber, the wavelength of the pumping light of multiple pumping sources same as or different from power.

Embodiment two

The second embodiment includes all the technical features in the first embodiment, and the difference is that the first resonator-doped gain fiber and the second resonator-doped gain fiber in the second embodiment both use erbium-ytterbium co-doped double-clad fibers, Wherein the first resonator-doped gain fiber 10 is Nufern 10/125 erbium-ytterbium co-doped double-clad fiber, the second resonator-doped gain fiber 20 is Nufern 6/125 erbium-ytterbium co-doped double-clad fiber, and the The wavelength of the laser with the first wavelength in the first resonant cavity is 1535 nm, and the corresponding laser with the second wavelength in the second resonant cavity has a wavelength of 1650 nm.

In other embodiments, the first resonator-doped gain fiber and the second resonator-doped gain fiber can also be single-clad, double-clad or multi-clad active fibers doped with rare earth elements such as thulium-doped fiber.

Embodiment three

As shown in Figure 2, the second embodiment includes all the technical features in the first embodiment, the difference is that the pumping structure in this embodiment is a bidirectional pumping structure in which two pumping directions exist at the same time, and another pumping direction is provided. Source 3 and another pump beam combiner 4, the two pump sources and the pump beam combiner constitute the bidirectional pumping of the first resonant cavity doped gain fiber, and the pump light wavelength and power of the two pump sources are the same or different.

Embodiment four

As shown in Figure 3, the fourth embodiment includes all the technical features in the first embodiment, the difference is that the pumping structure in this embodiment is a pumping structure in which two pumping sources are connected in series, and another pumping source is provided And another pump beam combiner, the two pump beam combiners are connected in series to form the unidirectional series pumping of the first resonant cavity doped gain fiber, and the pump light wavelength and power of the two pump sources are the same or different , serial input can increase the number and power of input pumps, and increase the laser output power.

Based on the principle of dual-cavity coupling, the present invention realizes an integrated all-fiber passive Q-switched pulsed fiber laser through in-band pumping, fully utilizes the wide absorption bandwidth and emission bandwidth of the doped gain fiber, and there is a considerable overlap between the two range characteristics, the working band of the resonator is reasonably designed, and the dual functions of laser radiation gain and saturation absorption are realized in the doped gain fiber. The radiation laser of the first resonator is used to pump the second resonator, and the coupling cavity is realized. All-fiber integrated passive Q-switched pulsed fiber laser. At the same time, the difference between the core diameter of the second resonant cavity doped gain fiber and the first resonant cavity doped gain fiber is used to increase the energy density of the laser in the second resonant cavity doped gain fiber and improve the passive saturable absorber. Bleach switch ability. The pulsed fiber laser of the present invention has compact structure and stable performance, and truly realizes the all-fiberization of the pulsed fiber laser.

The above embodiments are detailed descriptions of preferred embodiments of the present invention with reference to the accompanying drawings. Those skilled in the art can make various modifications or changes to the above embodiments without departing from the essence of the present invention, all of which fall within the protection scope of the present invention.

Claims (10)

1. a kind of all -fiber passive Q regulation pulse optical fiber laser, it is characterised in that：Including pumping source (1), pump combiner (2), First the first speculum of resonator (11), first the second speculum of resonator (12), second the first speculum of resonator (21), Two the second speculums of resonator (22), the first resonator doped gain fiber (10), the second resonator doped gain fiber (20) With mould field adaptation (30), the pump source fiber output end connects the pumping end of the pump combiner, and beam is closed in the pumping The signal output part of device connects one end of the first resonator doped gain fiber, the first resonator doped gain fiber The other end connect the speculum of the first resonator second, the signal input part of the pump combiner passes through the mould field Orchestration (30) connects one end of the speculum of the second resonator second, and the other end of the speculum of the second resonator second connects One end of the second resonator doped gain fiber is connect, the other end connection of the second resonator doped gain fiber is described Second the first speculum of resonator, other end connection first resonator first of the speculum of the second resonator first is anti- Penetrate mirror；The speculum of second resonator first, the second resonator doped gain fiber and second resonator the second speculum structure Into the second resonator；The speculum of first resonator first, the speculum of the first resonator second and between the two One resonator doped gain fiber, pump combiner, mould field adaptation, second the second speculum of resonator, the second resonator are mixed Miscellaneous gain fibre and second the first speculum of resonator constitute the first resonator；

The pump light that pumping source is produced is coupled into the first resonator via pump combiner, in the first resonator doping gain light Spontaneous radiation is produced in fibre, first is formed via first the first speculum of resonator and first the second speculum of resonator positive feedback Resonator first wave length laser, the first wave length laser is located in the absorption band of the second resonator doped gain fiber, by second The second resonator doped gain fiber, which absorbs, in resonator produces spontaneous emission light, the spontaneous emission light in the second resonator via Second the first speculum of resonator and second the second speculum of resonator positive feedback form the second wave length laser of the second resonator, The wavelength of second wave length laser is more than the wavelength of first wave length laser；

The first wave length laser that first resonator is produced is in the second resonator doped gain fiber by the second resonator, and the Two resonator doped gain fibers are bleached because of saturated absorption first wave length laser, to the first wave length laser shape of the first resonator Into impulse modulation, the first wave length laser of the first resonator is developed into first wave length pulse laser；What the first resonator was produced First wave length laser pumped by pulsed laser the second resonator doped gain fiber, forms second wave length pulse laser in the second resonator Output, wherein, the second resonator doped gain fiber serves as the gain media of the second resonator and the quilt of the first resonator laser The dual-use function of dynamic modulation saturated absorbing body；

The wavelength of wavelength ratio the first resonator first wave length pulse laser of the second wave length pulse laser of second resonator output Second wave length pulse laser that is long, being exported via second the second speculum of resonator of the second resonator, by mould field adaptation And after pump combiner, amplified by the first resonator doped gain fiber, then exported from first the second speculum of resonator.

2. all -fiber passive Q regulation pulse optical fiber laser according to claim 1, it is characterised in that：First resonance The speculum of chamber first, first the second speculum of resonator, second the first speculum of resonator and second the second speculum of resonator It is reflection-type Bragg grating.

3. all -fiber passive Q regulation pulse optical fiber laser according to claim 2, it is characterised in that：First resonance The speculum of chamber first and first the second speculum of resonator are the high reflective grid that operating wave strong point reflectivity is more than 99%；Described Two the first speculums of resonator are the high reflective grid that operating wave strong point reflectivity is more than 99%, and second resonator second reflects Mirror is reflection-type Bragg grating of the operating wave strong point reflectivity between 10%~98%.

4. all -fiber passive Q regulation pulse optical fiber laser according to claim 1, it is characterised in that：The pumping source is Fiber coupling output semiconductor laser, its pump wavelength scope is located between 780nm~2000nm.

5. all -fiber passive Q regulation pulse optical fiber laser according to claim 4, it is characterised in that：The semiconductor swashs The driving and control of light device are implemented by FPGA/CPLD, and pumping working method is pulse mode or continuation mode.

6. all -fiber passive Q regulation pulse optical fiber laser according to claim 1, it is characterised in that：First resonance Chamber doped gain fiber and the second resonator doped gain fiber are Yb dosed optical fiber or erbium-ytterbium co-doped fiber or thulium doped fiber Single covering or double clad or many covering Active Optical Fibers.

7. all -fiber passive Q regulation pulse optical fiber laser according to claim 1, it is characterised in that：First resonance The physical dimension core diameter of chamber doped gain fiber is fine not less than the physical dimension of the second resonator doped gain fiber Core diameter, the numerical aperture of the two fibre core is identical or close.

8. all -fiber passive Q regulation pulse optical fiber laser according to claim 1, it is characterised in that：Beam is closed in the pumping Device is the wavelength-division multiplex bundling device based on single-mode fiber or multimode fibre, or, the pump combiner is by fused biconical taper work (1+1) X1 or (2+1) X1 or (N+1) X1 pump combiners that skill makes.

9. all -fiber passive Q regulation pulse optical fiber laser according to claim 1, it is characterised in that：Beam is closed in the pumping The position of device is humorous between described first by being transformed between the mould field adaptation and the first resonator doped gain fiber Between chamber doped gain fiber of shaking and first the second speculum of resonator, pump combiner output end connects the doping of the first resonator Gain fibre；Or, provided with another or multiple pumping sources and pump combiner, multiple pumping sources and pump combiner constitute the The two directional pump of one resonator doped gain fiber or concatenation pumping, the pump wavelength of multiple pumping sources are identical with power or not Together.

10. all -fiber passive Q regulation pulse optical fiber laser according to claim 1, it is characterised in that：First resonance The wavelength of the first wave length laser of chamber is 1035nm, and the wavelength of the second wave length laser of corresponding second resonator is 1064nm； Or, the wavelength of the first wave length laser of first resonator is 1535nm, and the second wave length of corresponding second resonator swashs The wavelength of light is 1650nm.