CN104297845A - Laser fiber transmission system capable of monitoring cladding light and feedback light - Google Patents
Laser fiber transmission system capable of monitoring cladding light and feedback light Download PDFInfo
- Publication number
- CN104297845A CN104297845A CN201410539741.7A CN201410539741A CN104297845A CN 104297845 A CN104297845 A CN 104297845A CN 201410539741 A CN201410539741 A CN 201410539741A CN 104297845 A CN104297845 A CN 104297845A
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- China
- Prior art keywords
- optical fiber
- reverse
- light
- fiber
- laser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 74
- 238000005253 cladding Methods 0.000 title claims abstract description 60
- 239000000835 fiber Substances 0.000 title claims abstract description 46
- 238000012544 monitoring process Methods 0.000 title claims abstract description 14
- 230000008878 coupling Effects 0.000 claims abstract description 57
- 238000010168 coupling process Methods 0.000 claims abstract description 57
- 238000005859 coupling reaction Methods 0.000 claims abstract description 57
- 238000001514 detection method Methods 0.000 claims abstract description 53
- 239000000523 sample Substances 0.000 claims abstract description 35
- 230000003287 optical effect Effects 0.000 claims abstract description 14
- 239000013307 optical fiber Substances 0.000 claims description 78
- 230000000694 effects Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
- H04B10/07955—Monitoring or measuring power
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4286—Optical modules with optical power monitoring
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2589—Bidirectional transmission
- H04B10/25891—Transmission components
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention relates to a laser fiber transmission system capable of monitoring cladding light and feedback light. A forward fiber coupling structure and a reverse fiber coupling structure are arranged at the position, close to the output end, of a laser transmission fiber and located in the forward direction and the reverse direction of a fiber inner cladding. The reverse fiber coupling structure couples the reverse feedback light of the reverse cladding into a reverse coupling detection fiber. The forward fiber coupling structure couples the forward cladding light into a forward coupling detection fiber. The reverse coupling detection fiber and the forward coupling detection fiber are each connected with a photoelectric probe device. Photoelectric probes inside the two photoelectric probe devices are connected with a signal processing circuit through signal lines respectively. The output end of the signal processing circuit outputs an alarm signal or a related optical signal. According to the laser fiber transmission system, laser transmission is carried out on light-through dual-cladding fiber cores, meanwhile, the cladding light transmitted in the inner cladding and the feedback light reflected from the exterior to the interior of the system can be effectively monitored in real time, and the effects of monitoring the laser transmission cladding power and protecting the laser transmission system are achieved.
Description
Technical field
The present invention relates to a kind of transmission laser system monitoring cladding light and feedback light; this system is while logical light doubly clad optical fiber fibre core carries out Laser Transmission; effectively can enter intrasystem feedback light for the cladding light transmitted at inner cladding and transmission laser system external reflection to monitor in real time; reach for the covering power monitoring of Laser Transmission and the protective effect to transmission laser system, belong to high-power laser optical fiber transmission technique field.
Background technology
Compared to the transmission of traditional space laser, the Optical Fiber Transmission of laser can realize reliable and stable long-distance flexible transmission, so laser fiber-optic transmission system is widely used in Laser Processing industrial circle.Laser beam exports after Optical Fiber Transmission, after beam shaping, acts on surface of the work, utilizes the high energy of laser to reach the object of processing workpiece.In laser fiber-optic transmission system, laser is from Transmission Fibers one section output.
Major part is adopted to the laser instrument of Optical Fiber Transmission, the laser transmission fiber of use is doubly clad optical fiber, and laser transmits in fibre core.But divide due to laser beam-generating section or transmission system to be divided with laser beam-generating section and is coupled, actual not only have Laser Transmission at fiber core in laser fiber-optic transmission system, there is cladding light transmission in the inner cladding of this double clad Transmission Fibers simultaneously.This not at the cladding light that fibre core is propagated, the beam quality that laser fiber-optic transmission system exports can be affected greatly, affect the safety and stability of transmission system simultaneously.
In transmission laser system actual application, laser is radiated at surface of the work, and due to light path principle of reversibility, the laser of workpiece to be machined surface reflection is within the scope of transmission system output aperture, can form feedback light along the light path system that oppositely enters, direction is contrary with fibre core Laser output direction.The laser beam-generating section branch of this feedback light to transmission laser system and leading portion produces adverse influence.Because optical fiber inner cladding diameter is much larger than core diameter, so feedback light great majority are all present in transmission laser system Transmission Fibers inner cladding.
Summary of the invention
Object of the present invention, in order to monitor the cladding light and feedback light that affect laser fiber-optic transmission system, realizes the real-time follow-up to laser fiber-optic transmission system service condition and protection, and a kind of transmission laser system proposed.
The object of the invention is to be achieved through the following technical solutions.
A kind of laser fiber-optic transmission system monitoring cladding light and feedback light, comprise: two photoelectric probe devices, signal processing circuit, Transmission Fibers, forward coupling detection optical fiber, reverse coupled detection optical fiber, it is characterized in that: at the forward of laser transmission fiber on the optical fiber inner cladding of output terminal with oppositely arrange forward optical coupling structure and reverse optical fiber coupled structure, the feedback light of reverse covering is coupled into reverse coupled detection optical fiber by reverse optical fiber coupled structure, the cladding light of forward is coupled into forward coupling detection optical fiber by forward optical coupling structure, reverse coupled detection optical fiber, forward coupling detection optical fiber connects a photoelectric probe device respectively, photoelectric probe in two photoelectric probe devices is connected with signal processing circuit by respective signal wire, signal processing circuit output terminal output alarm signal or relative light signal.Be coupled detection optical fiber, reverse coupled detection optical fiber by cladding light signal input photoelectric probe by forward, utilize photoelectric probe that light signal is converted into electric signal, input signal processing circuit, reach the object of the feedback light monitoring to forward cladding light and reverse covering.When the cladding light power monitored arrives warning power, signal processing circuit sends alerting signal, thus the function that realization is protected laser fiber-optic transmission system.
Described forward optical coupling structure is exactly becoming naked fibre near the output terminal coat of Laser output optical fiber and surrounding layer Transformatin, and forward coupling detection optical fiber outbound course is consistent with transmission laser system light direction; After forward coupling detection optical fiber is coupled with Transmission Fibers inner cladding, the cladding light of forward transmission will enter forward coupling detection optical fiber along coupling direction partial coupling.
Described reverse optical fiber coupled structure is exactly becoming naked fibre near the output terminal coat of Laser output optical fiber and surrounding layer Transformatin, reverse coupled detection optical fiber outbound course is contrary with transmission laser system light direction, after reverse coupled detection optical fiber is coupled with Transmission Fibers inner cladding, in covering, the feedback light of reverse transfer will enter reverse coupled detection optical fiber along coupling direction partial coupling.
The present invention contrasts prior art and has following beneficial effect: the present invention arranges optical coupling structure on laser transmission fiber inner cladding; the cladding light of the feedback light of reverse covering and forward is coupled into respectively reverse optical fiber detection optical fiber and forward coupling detection optical fiber, utilizes photoelectric probe to reach object to the feedback light monitoring of forward cladding light and reverse covering thus the protection realized laser fiber-optic transmission system.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the laser fiber-optic transmission system can monitoring cladding light and feedback light;
Fig. 2 is cladding light coupling unit schematic diagram;
Label declaration:
1 is the output terminal of transmission laser system bright dipping part, 2 for removing the Transmission Fibers of coat, 3 for being with the Transmission Fibers of coat, 4 is reverse optical fiber coupled structure, 5 is forward optical coupling structure, 6 is reverse coupled detection optical fiber, 7 is forward coupling detection optical fiber, 8 is feedback cladding light photoelectric probe device, and 9 is forward cladding light photoelectric probe device, and 10 is forward cladding light photoelectric probe device signal wire, 11 is feedback cladding light photoelectric probe device signal wire, 12 is signal processing circuit, and 13 is signal processing circuit output terminal, and 14 is photoelectric probe.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 1, a kind of laser fiber-optic transmission system monitoring cladding light and feedback light, comprise: two photoelectric probe devices (8, 9), signal processing circuit 12, Transmission Fibers 3, forward coupling detection optical fiber 7, reverse coupled detection optical fiber 6, it is characterized in that: at the forward of laser transmission fiber 3 on the optical fiber inner cladding of output terminal 1 with oppositely arrange forward optical coupling structure 5 and reverse optical fiber coupled structure 4, the feedback light of reverse covering is coupled into reverse coupled detection optical fiber 6 by reverse optical fiber coupled structure 4, the cladding light of forward is coupled into forward coupling detection optical fiber 7 by forward optical coupling structure 5, reverse coupled detection optical fiber 6, forward coupling detection optical fiber 7 connects a photoelectric probe device respectively, two photoelectric probe devices (8, 9) photoelectric probe 14 in is by respective signal wire (10, 11) be connected with signal processing circuit 12, signal processing circuit 12 output terminal 13 output alarm signal or relative light signal.Be coupled detection optical fiber, reverse coupled detection optical fiber by cladding light signal input photoelectric probe by forward, utilize photoelectric probe that light signal is converted into electric signal, input signal processing circuit, reach the object of the feedback light monitoring to forward cladding light and reverse covering.When the cladding light power monitored arrives warning power, signal processing circuit sends alerting signal, thus the function that realization is protected laser fiber-optic transmission system.
As shown in Figure 2, at laser transmission fiber 3, forward optical coupling structure 5 and reverse optical fiber coupled structure 4 are set on the inner cladding of the Transmission Fibers 2 of the removal coat of output terminal 1, described forward optical coupling structure 5 becomes naked fibre at the output terminal coat of close Laser output optical fiber and surrounding layer Transformatin exactly, and forward coupling detection optical fiber 7 outbound course is consistent with transmission laser system light direction; After forward coupling detection optical fiber 7 is coupled with Transmission Fibers 3 inner cladding, the cladding light of forward transmission will enter forward coupling detection optical fiber 7 along coupling direction partial coupling; Described reverse optical fiber coupled structure 4 becomes naked fibre at the output terminal coat of close Laser output optical fiber and surrounding layer Transformatin exactly, reverse coupled detection optical fiber 6 outbound course is contrary with transmission laser system light direction, after reverse coupled detection optical fiber 6 is coupled with Transmission Fibers inner cladding, in covering, the feedback light of reverse transfer will enter reverse coupled detection optical fiber 6 along coupling direction partial coupling.Because coupling direction is different, forward cladding light is coupled into the reverse coupled detection optical fiber 6 of feedback light hardly.In like manner, the feedback light of reverse covering is also coupled into forward coupling detection optical fiber 7 hardly.So two kinds of detectable signals can not disturb.
By forward coupling detection optical fiber 7 by cladding light signal input photoelectric probe device 9, by reverse coupled detection optical fiber 6 by the light signal fed back of reverse covering input photoelectric probe device 8, all be provided with in probe 14 at electric probe device 9 and electric probe device 8 device, utilize probe 14 that the cladding light signal that detection optical fiber is collected is converted into electric signal, respectively by signal wire (10,11) input signal processing circuit 12.Can output alarm signal or relative light signal from the output terminal 13 of signal processing circuit 12.
When the light signal that the probe 14 of the photoelectric probe device 9 that forward optical coupling structure 5 is connected detects is greater than alerting signal threshold value, signal processing circuit 12 sends cladding light alerting signal by output terminal 13, and prompting is reported to the police.When the light signal that the probe 14 of the photoelectric probe device 8 that reverse optical fiber coupled structure 4 is connected detects is greater than alerting signal threshold value, signal processing circuit 12 sends cladding light alerting signal by output terminal 13, and prompting is reported to the police.
Claims (3)
1. can monitor the laser fiber-optic transmission system of cladding light and feedback light for one kind, comprise: two photoelectric probe devices, signal processing circuit, Transmission Fibers, forward coupling detection optical fiber, reverse coupled detection optical fiber, it is characterized in that: at the forward of laser transmission fiber on the optical fiber inner cladding of output terminal with oppositely arrange forward optical coupling structure and reverse optical fiber coupled structure, the feedback light of reverse covering is coupled into reverse coupled detection optical fiber by reverse optical fiber coupled structure, the cladding light of forward is coupled into forward coupling detection optical fiber by forward optical coupling structure, reverse coupled detection optical fiber, forward coupling detection optical fiber connects a photoelectric probe device respectively, photoelectric probe in two photoelectric probe devices is connected with signal processing circuit by respective signal wire, signal processing circuit output terminal output alarm signal or relative light signal.
2. a kind of laser fiber-optic transmission system monitoring cladding light and feedback light according to claim 1, it is characterized in that: described forward optical coupling structure is exactly becoming naked fibre near the output terminal coat of Laser output optical fiber and surrounding layer Transformatin, forward coupling detection optical fiber outbound course is consistent with transmission laser system light direction; After forward coupling detection optical fiber is coupled with Transmission Fibers inner cladding, the cladding light of forward transmission will enter forward coupling detection optical fiber along coupling direction partial coupling.
3. a kind of laser fiber-optic transmission system monitoring cladding light and feedback light according to claim 1, it is characterized in that: described reverse optical fiber coupled structure is exactly becoming naked fibre near the output terminal coat of Laser output optical fiber and surrounding layer Transformatin, reverse coupled detection optical fiber outbound course is contrary with transmission laser system light direction, after reverse coupled detection optical fiber is coupled with Transmission Fibers inner cladding, in covering, the feedback light of reverse transfer will enter reverse coupled detection optical fiber along coupling direction partial coupling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410539741.7A CN104297845A (en) | 2014-10-13 | 2014-10-13 | Laser fiber transmission system capable of monitoring cladding light and feedback light |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410539741.7A CN104297845A (en) | 2014-10-13 | 2014-10-13 | Laser fiber transmission system capable of monitoring cladding light and feedback light |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104297845A true CN104297845A (en) | 2015-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410539741.7A Pending CN104297845A (en) | 2014-10-13 | 2014-10-13 | Laser fiber transmission system capable of monitoring cladding light and feedback light |
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| Country | Link |
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| CN (1) | CN104297845A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107525583A (en) * | 2016-06-22 | 2017-12-29 | 中国科学院西安光学精密机械研究所 | All-fiber power measurement system for high-power fiber laser |
| CN112334807A (en) * | 2018-06-25 | 2021-02-05 | 通快激光有限责任公司 | Optical fiber cable with a cladding light sensor and associated calibration, test and monitoring device |
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2014
- 2014-10-13 CN CN201410539741.7A patent/CN104297845A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112334807A (en) * | 2018-06-25 | 2021-02-05 | 通快激光有限责任公司 | Optical fiber cable with a cladding light sensor and associated calibration, test and monitoring device |
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Application publication date: 20150121 |
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