CN103560386A - A single-pass forward multi-grating complex control erbium-doped fiber light source - Google Patents
A single-pass forward multi-grating complex control erbium-doped fiber light source Download PDFInfo
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Abstract
本发明属于掺铒光纤光源，具体涉及一种单程前向多光栅复合控制掺铒光纤光源。一种单程前向多光栅复合控制掺铒光纤光源，包括顺次设置的，且信号连接的无制冷泵浦激光器、聚焦镜、掺铒光纤，在无制冷泵浦激光器与聚焦镜之间设置选频光栅和温度补偿光栅，在掺铒光纤的输出端设置输出光谱滤波光栅，输出光谱滤波光栅的输出信号为整个装置的输出信号。本发明的有益效果是：本发明针对泵浦激光器输出中心波长漂移与输出光谱谱宽的变化，提出了采用多光栅复合控制方案，有效地控制了泵浦激光器的输出光谱谱宽变化和中心波长温度漂移。
The invention belongs to an erbium-doped fiber light source, in particular to a one-way forward multi-grating composite control erbium-doped fiber light source. A single-pass forward multi-grating composite control erbium-doped fiber light source, including a cooling-free pump laser, a focusing mirror, and an erbium-doped optical fiber arranged in sequence and connected by signals, and a selection is set between the cooling-free pump laser and the focusing mirror. frequency grating and temperature compensation grating, output spectral filter grating is set at the output end of the erbium-doped fiber, and the output signal of the output spectral filter grating is the output signal of the whole device. The beneficial effects of the present invention are: the present invention aims at the output center wavelength drift and the change of the output spectral width of the pump laser, and proposes a multi-grating composite control scheme, which effectively controls the output spectral width change and the central wavelength of the pump laser. temperature drift.
Description
Technical field
The invention belongs to Er-Doped superfluorescent fiber source, be specifically related to the compound control Er-Doped superfluorescent fiber source of the many gratings of a kind of one way forward direction.
Background technology
Optic fiber gyroscope generally adopts two kinds of light source: SLD and Er-Doped superfluorescent fiber source at present, SLD light-source temperature poor-performing, need TEC(thermoelectricity to control) reduce its responsive to temperature performance, be limited to the impact of TEC control precision, high-precision optical fiber gyro extensively adopts Er-Doped superfluorescent fiber source, the critical component of Er-Doped superfluorescent fiber source is pump laser, and its Main Function is that the pump light of 980nm or 1480nm is provided for Er-Doped superfluorescent fiber source.In actual applications, the output light of pump laser can produce along with the variation of external environment fluctuation, be mainly the variation that is embodied in the drift of centre wavelength and the spectrum width of output spectrum, the variation meeting of these two factors causes very large impact to Er-Doped superfluorescent fiber source performance.Need to take measures it to carry out effectively controlling to reduce its impact.
Specifically, the structure of existing Er-Doped superfluorescent fiber source is generally divided into four kinds as shown in accompanying drawing 1～4: one way forward direction, one way are backward, double-pass forward, double-pass backward.The building block of four kinds of structures is by forming without refrigeration pump laser, Er-doped fiber, speculum, condenser lens, but the position difference of device has determined the different structure of light source.Generally speaking under the condition of the fine length of equal erbium and pump laser output, because single-pass structure is only utilized forward direction in Er-doped fiber or the spontaneous radiation of backward amplify, and the spontaneous radiation of other direction does not effectively utilize, so single-pass structure is low compared with dual channel structure Output optical power.
Single-pass forward direction structure (as Fig. 1) in single-pass structure, when if Er-doped fiber length is longer, the similar loss of pump light of fiber-optic output totally, now forward direction output intensity is more weak, in addition between pump laser and optic fiber gyroscope light signal, all can produce light feedback, these two kinds of light feedbacks can form resonant cavity in Er-doped fiber, and output spectrum is narrowed down, and therefore at interference type optical fiber gyroscope, generally do not adopt this structure.The backward structure of single-pass (as Fig. 2), in this structure, Er-doped fiber prolongs former and later two directions and produces spontaneous amplified spont-aneous emission signal, the feature of this scheme is only to utilize backward spontaneous amplified spont-aneous emission light, one of its advantage is the additional noise that can effectively avoid light feedback to introduce, two of advantage is that this structure can be insensitive to interior on a large scale pump power variation, presents high stability.
Bilateral forward direction structure (as Fig. 3) in dual channel structure, speculum is at pump light input, adopt wavelength division multiplexer that pump light is injected to Er-doped fiber, along forward, backward both direction, produce amplified spont-aneous emission signal, ASE backward after speculum reflection, again by Er-doped fiber, amplify and with the spontaneous amplification radiation of forward direction ASE() stack, form stronger forward direction power output.Bilateral backward structure (as Fig. 4), utilizes wavelength division multiplexer that pump light is injected to erbium-doped fiber, forward, both direction produces spontaneous radiation signal backward.After ASE forward again amplifies by erbium-doped fiber after speculum reflection and with ASE backward, superpose, form stronger backward power output.In two kinds of structures, bilateral backward structure has better wavelength stability than bilateral forward direction structure.
There is equally the output center wavelength stable problem of pump laser in these four kinds of structures in a word, cannot well satisfy the demands in actual applications.
Summary of the invention
The object of the invention is the defect for prior art, provide the many gratings of a kind of one way forward direction compound control Er-Doped superfluorescent fiber source.
The present invention is achieved in that the compound control Er-Doped superfluorescent fiber source of the many gratings of a kind of one way forward direction, comprise in turn and to arrange, and signal connect without refrigeration pump laser, focus lamp, Er-doped fiber, between without refrigeration pump laser and focus lamp, frequency-selecting grating and temperature-compensating grating are set, output at Er-doped fiber arranges output spectrum filtering grating, the output signal that the output signal of output spectrum filtering grating is whole device.
The compound control Er-Doped superfluorescent fiber source of the many gratings of a kind of one way forward direction as above, wherein, the order that arranges of frequency-selecting grating and temperature-compensating grating is, output signal without refrigeration pump laser sends to frequency-selecting grating, the output signal of frequency-selecting grating sends to temperature-compensating grating, and the output signal of temperature-compensating grating sends to focus lamp
The compound control Er-Doped superfluorescent fiber source of the many gratings of a kind of one way forward direction as above, wherein, in this device, the effect of frequency-selecting grating is the frequency-selecting of laser output light, temperature-compensating grating Main Function is the variations in temperature compensation of centre wavelength, the effect of output spectrum filtering grating is output spectrum filtering, has further guaranteed the stability of output spectrum.
The invention has the beneficial effects as follows: this patent is the variation with output spectrum spectrum width for the drift of pump laser output center wavelength, proposed to adopt many gratings compound control scheme, the output spectrum spectrum width of effectively having controlled pump laser changes and centre wavelength temperature drift.
Accompanying drawing explanation
Fig. 1 is the structural representation of one way forward direction Er-Doped superfluorescent fiber source in conventional art;
Fig. 2 is the structural representation of the backward Er-Doped superfluorescent fiber source of one way in conventional art;
Fig. 3 is the structural representation of double-pass forward Er-Doped superfluorescent fiber source in conventional art;
Fig. 4 is the structural representation of double-pass backward Er-Doped superfluorescent fiber source in conventional art;
Fig. 5 is the structural representation of the compound control Er-Doped superfluorescent fiber source of the many gratings of one way forward direction provided by the invention;
Fig. 6 is the structural representation of the compound control Er-Doped superfluorescent fiber source of the backward many gratings of one way provided by the invention;
Fig. 7 is the structural representation of the compound control Er-Doped superfluorescent fiber source of the many gratings of double-pass forward provided by the invention;
Fig. 8 is the structural representation of the compound control Er-Doped superfluorescent fiber source of the many gratings of double-pass backward provided by the invention;
In figure: 1. without refrigeration pump laser, 2. focus lamp, 3. Er-doped fiber, 4. signal output, 5. frequency-selecting grating, 6. temperature-compensating grating, 7. output spectrum filtering grating, 8. speculum grating.
Embodiment
Example one
As shown in Figure 5, the compound control Er-Doped superfluorescent fiber source of the many gratings of a kind of one way forward direction, comprise in turn and to arrange, and signal connect without refrigeration pump laser 1, focus lamp 2, Er-doped fiber 3, different from conventional solution is, between without refrigeration pump laser 1 and focus lamp 2, frequency-selecting grating 5 and temperature-compensating grating 6 are set, arrange sequentially for the output signal without refrigeration pump laser 1 sends to frequency-selecting grating 5, the output signal of frequency-selecting grating 5 sends to temperature-compensating grating 6, and the output signal of temperature-compensating grating 6 sends to focus lamp 2.Output at Er-doped fiber 3 arranges output spectrum filtering grating 7.The output signal that the output signal of output spectrum filtering grating 7 is whole device.
In this device, 5 effects of frequency-selecting grating are frequency-selectings (being that centre wavelength is selected) of laser output light, temperature-compensating grating 6 Main Functions are variations in temperature compensation of centre wavelength, the effect of output spectrum filtering grating 7 is output spectrum filtering, has further guaranteed the stability of output spectrum.
The course of work of this device is roughly: without refrigeration pump laser 1, produce primary signal, this primary signal is after the frequency-selecting of frequency-selecting grating 5 and the temperature-compensating of temperature-compensating grating 6, send to focus lamp 2, after the focusing of focus lamp 2, signal is sent to Er-doped fiber 3, processing through Er-doped fiber 3, signal is sent to output spectrum filtering grating 7, after the filtering again of this output spectrum filtering grating 7, generates final output signal.
Embodiment bis-
As shown in Figure 6, the compound control Er-Doped superfluorescent fiber source of the backward many gratings of a kind of one way, comprise in turn and to arrange, and signal connect without refrigeration pump laser 1, focus lamp 2, Er-doped fiber 3, different from conventional solution is, between without refrigeration pump laser 1 and focus lamp 2, frequency-selecting grating 5 and temperature-compensating grating 6 are set, arrange sequentially for the output signal without refrigeration pump laser 1 sends to frequency-selecting grating 5, the output signal of frequency-selecting grating 5 sends to temperature-compensating grating 6, and the output signal of temperature-compensating grating 6 sends to focus lamp 2.Forward output at Er-doped fiber 3 arranges speculum grating 8, at the inverse output terminal of Er-doped fiber 3, output spectrum filtering grating 7 is set.The output signal that the output signal of output spectrum filtering grating 7 is whole device.
In this device, 5 effects of frequency-selecting grating are frequency-selectings (being that centre wavelength is selected) of laser output light, temperature-compensating grating 6 Main Functions are variations in temperature compensation of centre wavelength, the effect of output spectrum filtering grating 7 is output spectrum filtering, further guaranteed the stability of output spectrum, speculum grating 8 opens speculum effect.
The course of work of this device is roughly: without refrigeration pump laser 1, produce primary signal, this primary signal is after the frequency-selecting of frequency-selecting grating 5 and the temperature-compensating of temperature-compensating grating 6, send to focus lamp 2, after the focusing of focus lamp 2, signal is sent to Er-doped fiber 3, processing through Er-doped fiber 3, signal is sent to speculum grating 8, through reflection, signal enters Er-doped fiber 3 again, processing through Er-doped fiber 3, signal is sent to output spectrum filtering grating 7, after the filtering again of this output spectrum filtering grating 7, generate final output signal.
Embodiment tri-
As shown in Figure 7, the compound control Er-Doped superfluorescent fiber source of the many gratings of a kind of double-pass forward, comprise in turn and to arrange, and signal connect without refrigeration pump laser 1, focus lamp 2, Er-doped fiber 3, different from conventional solution is, between without refrigeration pump laser 1 and focus lamp 2, frequency-selecting grating 5 and temperature-compensating grating 6 are set, arrange sequentially for the output signal without refrigeration pump laser 1 sends to frequency-selecting grating 5, the output signal of frequency-selecting grating 5 sends to temperature-compensating grating 6, and the output signal of temperature-compensating grating 6 sends to focus lamp 2.Between focus lamp 2 and Er-doped fiber 3, speculum grating 8 is set, and the reflecting surface of speculum grating 8 is towards Er-doped fiber 3, at the inverse output terminal of Er-doped fiber 3, output spectrum filtering grating 7 is set.The output signal that the output signal of output spectrum filtering grating 7 is whole device.
In this device, 5 effects of frequency-selecting grating are frequency-selectings (being that centre wavelength is selected) of laser output light, temperature-compensating grating 6 Main Functions are variations in temperature compensation of centre wavelength, the effect of output spectrum filtering grating 7 is output spectrum filtering, further guaranteed the stability of output spectrum, speculum grating 8 opens speculum effect.
The course of work of this device is roughly: without refrigeration pump laser 1, produce primary signal, this primary signal is after the frequency-selecting of frequency-selecting grating 5 and the temperature-compensating of temperature-compensating grating 6, send to focus lamp 2, after the focusing of focus lamp 2, signal is sent to Er-doped fiber 3, Er-doped fiber 3, processing through Er-doped fiber 3, signal is sent to speculum grating 8, through reflection, signal enters Er-doped fiber 3 again, processing through Er-doped fiber 3, signal is sent to output spectrum filtering grating 7, after the filtering again of this output spectrum filtering grating 7, generate final output signal.
Embodiment tetra-
As shown in Figure 8, the compound control Er-Doped superfluorescent fiber source of the many gratings of a kind of double-pass backward, comprise in turn and to arrange, and signal connect without refrigeration pump laser 1, focus lamp 2, Er-doped fiber 3, different from conventional solution is, between without refrigeration pump laser 1 and focus lamp 2, frequency-selecting grating 5 and temperature-compensating grating 6 are set, arrange sequentially for the output signal without refrigeration pump laser 1 sends to frequency-selecting grating 5, the output signal of frequency-selecting grating 5 sends to temperature-compensating grating 6, and the output signal of temperature-compensating grating 6 sends to focus lamp 2.The output signal of focus lamp 2 sends to Er-doped fiber 3.The forward output of Er-doped fiber 3 is connected with speculum grating 8 signals, and signal again returns to Er-doped fiber 3 after the reflection of speculum grating 8.Er-doped fiber 3 inverse output terminals arrange output spectrum filtering grating 7.The output signal that the output signal of output spectrum filtering grating 7 is whole device.
In this device, 5 effects of frequency-selecting grating are frequency-selectings (being that centre wavelength is selected) of laser output light, temperature-compensating grating 6 Main Functions are variations in temperature compensation of centre wavelength, the effect of output spectrum filtering grating 7 is output spectrum filtering, further guaranteed the stability of output spectrum, speculum grating 8 opens speculum effect.
The course of work of this device is roughly: without refrigeration pump laser 1, produce primary signal, this primary signal is after the frequency-selecting of frequency-selecting grating 5 and the temperature-compensating of temperature-compensating grating 6, send to focus lamp 2, after the focusing of focus lamp 2, signal is sent to Er-doped fiber 3, Er-doped fiber 3, processing through Er-doped fiber 3, signal is sent to speculum grating 8, through reflection, signal enters Er-doped fiber 3 again, processing through Er-doped fiber 3, signal is sent to output spectrum filtering grating 7, after the filtering again of this output spectrum filtering grating 7, generate final output signal.
Claims (3)
1. the compound control Er-Doped superfluorescent fiber source of the many gratings of one way forward direction, comprise in turn and to arrange, and signal connect without refrigeration pump laser (1), focus lamp (2), Er-doped fiber (3), it is characterized in that: between without refrigeration pump laser (1) and focus lamp (2), frequency-selecting grating (5) and temperature-compensating grating (6) are set, output at Er-doped fiber (3) arranges output spectrum filtering grating (7), the output signal that the output signal of output spectrum filtering grating (7) is whole device.
2. the compound control Er-Doped superfluorescent fiber source of the many gratings of a kind of one way forward direction as claimed in claim 1, it is characterized in that: the order that arranges of frequency-selecting grating (5) and temperature-compensating grating (6) is, output signal without refrigeration pump laser (1) sends to frequency-selecting grating (5), the output signal of frequency-selecting grating (5) sends to temperature-compensating grating (6), and the output signal of temperature-compensating grating (6) sends to focus lamp (2).
3. the compound control Er-Doped superfluorescent fiber source of the many gratings of a kind of one way forward direction as claimed in claim 2, it is characterized in that: in this device, frequency-selecting grating (5) effect is the frequency-selecting of laser output light, temperature-compensating grating (6) Main Function is the variations in temperature compensation of centre wavelength, the effect of output spectrum filtering grating (7) is output spectrum filtering, has further guaranteed the stability of output spectrum.
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Cited By (1)
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| CN115824265A (en) * | 2023-02-27 | 2023-03-21 | 中国船舶集团有限公司第七〇七研究所 | Method for reducing temperature sensitivity of scale factor of fiber-optic gyroscope and fiber-optic gyroscope |
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| CN115824265A (en) * | 2023-02-27 | 2023-03-21 | 中国船舶集团有限公司第七〇七研究所 | Method for reducing temperature sensitivity of scale factor of fiber-optic gyroscope and fiber-optic gyroscope |
| CN115824265B (en) * | 2023-02-27 | 2023-04-21 | 中国船舶集团有限公司第七〇七研究所 | Method for reducing temperature sensitivity of scale factor of fiber optic gyroscope and fiber optic gyroscope |
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