CN203690693U - High-speed broadband narrow linewidth swept all fiber laser - Google Patents
High-speed broadband narrow linewidth swept all fiber laser Download PDFInfo
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- CN203690693U CN203690693U CN201320784023.7U CN201320784023U CN203690693U CN 203690693 U CN203690693 U CN 203690693U CN 201320784023 U CN201320784023 U CN 201320784023U CN 203690693 U CN203690693 U CN 203690693U
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- fiber
- semiconductor laser
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- laser
- narrow linewidth
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- 239000000835 fiber Substances 0.000 title claims abstract description 88
- 239000004065 semiconductor Substances 0.000 claims abstract description 71
- 239000013307 optical fiber Substances 0.000 claims abstract description 52
- 238000005086 pumping Methods 0.000 claims abstract description 17
- 238000000862 absorption spectrum Methods 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000000295 emission spectrum Methods 0.000 claims description 3
- 238000010408 sweeping Methods 0.000 description 9
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model relates to a high-speed broadband narrow linewidth swept all fiber laser including a semiconductor laser, a semiconductor laser drive current source, an optical fiber coupler, an optical fiber isolator, an optical fiber wavelength division multiplexer, a gain fiber, a pumping semiconductor laser and an output end joint; the semiconductor laser drive current source is connected with the semiconductor laser which accesses the optical fiber coupler; the optical fiber coupler accesses the output end joint via the optical fiber isolator, the optical fiber wavelength division multiplexer, the gain fiber and the optical fiber coupler itself in turns; the pumping semiconductor laser accesses the optical fiber wavelength division multiplexer. The utility model provides the high-speed broadband narrow linewidth swept all fiber laser with wide frequency broadband, high speed, narrow linewidth and stable power.
Description
Technical field
The utility model belongs to fiber laser field, relates to a kind of full-optical-fiber laser, relates in particular to a kind of full-optical-fiber laser that can realize the scanning of narrow linewidth fast frequency and keep power invariability to export within the scope of wider bandwidth.
Background technology
Sweeping laser device is a kind of tunable laser, by the control of Output of laser wavelength being realized to the continuous of laser frequency or step-scan output.Narrow linewidth sweeping laser device can, for fields such as high accuracy range measurement, laser sensing, laser imagings, be considered to the very potential high-acruracy survey LASER Light Source of one.In measurement application, frequency sweep bandwidth determines the precision of measuring, and bandwidth is wider, and precision is higher; Frequency-scan speed determines the speed of measuring, and sweep velocity is faster, and measuring speed is faster; The live width of laser determines coherence distance, and coherence distance determines measuring distance; Laser power determines power and the error rate of echo, and echo power determines the tolerance of receiving system, and the error rate determines the accuracy of measurement data.Therefore, a kind ofly have that wide bandwidth, sweep velocity are fast, the frequency-sweeping laser source of narrow linewidth, power stability could really realize the laser measurement of high accuracy, high accuracy.
Ripe sweeping laser device comprises at present: Compound Cavity semiconductor laser, thermal tuning semiconductor laser, pressure-tuned short cavity fiber laser, thermal tuning short cavity fiber laser, ring cavity tunable solid laser.In these lasers, Compound Cavity semiconductor laser and ring cavity tunable solid laser adopt grating or FP interferometer as frequency-selecting and tuned cell, can realize narrow linewidth output, but belong to mechanical scanning type device, and sweep velocity is excessively slow; Thermal tuning semiconductor laser and thermal tuning short cavity fiber laser also can be realized narrow linewidth output, but belong to temperature control formula device, and sweep velocity is slow, frequency poor repeatability; Pressure-tuned short cavity fiber laser can be realized narrow linewidth output and rapid frequency-sweeping, but it is the parameter that changes chamber by ambient pressure, and frequency sweep bandwidth is narrower.Above-mentioned laser all can not realize simultaneously broadband, at a high speed, the Laser output of narrow linewidth.
Utility model content
In order to solve the above-mentioned technical problem existing in background technology, the utility model provides that a kind of frequency sweep band is wide, speed is high, the high-speed wideband narrow linewidth frequency sweep full-optical-fiber laser of line width and power stability.
Technical solution of the present utility model is: the utility model provides a kind of high-speed wideband narrow linewidth frequency sweep full-optical-fiber laser, and its special character is: described high-speed wideband narrow linewidth frequency sweep full-optical-fiber laser comprises semiconductor laser, semiconductor laser drive current source, fiber coupler, fibre optic isolater, optical fibre wavelength division multiplexer, gain fibre, light pumping semiconductor laser and output end connector; Described semiconductor laser drive current source is connected with semiconductor laser, described semiconductor laser incoming fiber optic coupler; Described fiber coupler is successively by fibre optic isolater, optical fibre wavelength division multiplexer, gain fibre and fiber coupler access output end connector; Described light pumping semiconductor laser incoming fiber optic wavelength division multiplexer.
Above-mentioned fiber coupler is 2 × 2 fiber couplers.
Above-mentioned 2 × 2 fiber couplers comprise two input ports and two output ports; Described semiconductor laser and gain fibre access respectively two input ports of 2 × 2 fiber couplers; Two output ports of described 2 × 2 fiber couplers access respectively output end connector and fibre optic isolater.
Above-mentioned gain fibre is the clad doped optical fiber of single mode list.
The absorption spectra of the clad doped optical fiber of above-mentioned single mode list and the output wavelength of light pumping semiconductor laser match.
The emission spectra of the clad doped optical fiber of above-mentioned single mode list and the output wavelength of semiconductor laser match.
Above-mentioned semiconductor laser is DFB narrow linewidth semiconductor laser.
Above-mentioned semiconductor laser is the DFB narrow linewidth semiconductor laser of coupling fiber output.
Above-mentioned output end connector is FC-APC joint or FC-PC joint.
The utility model has the advantages that:
The utility model provides a kind of high-speed wideband narrow linewidth frequency sweep full-optical-fiber laser, and this laser comprises DFB narrow linewidth semiconductor laser and drive current source, fiber coupler, fibre optic isolater, pump light source, gain fibre and output end connector; Wherein, fiber coupler, fibre optic isolater, gain fibre sequentially connect to form loop, by fiber coupler light splitting Output of laser, form annular chamber full-optical-fiber laser.The utility model adopts triangular pulse current drives DFB narrow linewidth semiconductor laser to realize the high-velocity scanning output of laser frequency, and the sweeping laser of generation is injected into and in all optical fiber ring cavity laser, carries out Frequency Locking, thereby obtain the high speed sweeping laser output of stable output power, solved the laser of mentioning in background technology and can not realize a difficult problem for these parameters simultaneously, for high accuracy, at a high speed, at a distance, the laser measurement of high accuracy provides solution.
Accompanying drawing explanation
Fig. 1 is the structural representation of high-speed wideband narrow linewidth frequency sweep full-optical-fiber laser provided by the utility model;
Fig. 2 is that the current waveform of semiconductor laser drive current source output is triangular wave schematic diagram;
Wherein:
1-semiconductor laser; 2-semiconductor laser drive current source; 3-fiber coupler; 4-fibre optic isolater; 5-optical fibre wavelength division multiplexer; 6-gain fibre; 7-light pumping semiconductor laser; 8-output end connector.
Embodiment
Referring to Fig. 1, the utility model provides a kind of high-speed wideband narrow linewidth frequency sweep full-optical-fiber laser, and this high-speed wideband narrow linewidth frequency sweep full-optical-fiber laser comprises semiconductor laser 1, semiconductor laser drive current source 2, fiber coupler 3, fibre optic isolater 4, optical fibre wavelength division multiplexer 5, gain fibre 6, light pumping semiconductor laser 7 and output end connector 8; Semiconductor laser drive current source 2 is connected with semiconductor laser 1, the output incoming fiber optic coupler 3 of semiconductor laser 1; Fiber coupler 3 accesses output end connector 8 by fibre optic isolater 4, optical fibre wavelength division multiplexer 5, gain fibre 6 and fiber coupler 3 successively; Light pumping semiconductor laser 7 incoming fiber optic wavelength division multiplexers 5.
Semiconductor laser 1 is the DFB narrow linewidth semiconductor laser of coupling fiber output, and the output linewidth of this laser is very narrow, is less than 100kHz.
The current waveform that export in semiconductor laser drive current source 2 is triangular wave, as shown in Figure 2.For dfb semiconductor laser, Injection Current and output frequency have linear relationship, injection triangular current as shown in Figure 2 just can make the laser of dfb semiconductor laser 1 output frequency continuous sweep, and laser scanning speed is microsecond magnitude, and the frequency bandwidth of laser can be greater than 1THz.Because the power output of Injection Current and semiconductor laser is linear, the power output of therefore injecting the semiconductor laser of triangular current is also triangular waveform.
Fiber coupler 3 is 2 × 2 fiber couplers, 2 input ports are connected with semiconductor laser 1, gain fibre 6,2 output ports are connected with fibre optic isolater 4 with output end connector 8 respectively, the laser of input port input is by after fiber coupler 3, and luminous power can be assigned to output port according to the splitting ratio of coupler.
Fibre optic isolater 4, is connected with fiber coupler 3, for isolating the laser oppositely passing through, makes laser unidirectional operation.
The input of optical fibre wavelength division multiplexer 5 is connected with light pumping semiconductor laser 7 with fibre optic isolater 4, the laser of the different wave length of exporting from fibre optic isolater 4 and light pumping semiconductor laser 7 closes ripple by optical fibre wavelength division multiplexer 5, exports gain fibre 6 to by the output of optical fibre wavelength division multiplexer 5.
Gain fibre 6, is the clad doped optical fiber of single mode list, and the emission spectra of doped chemical and absorption spectra will be mated with the output wavelength of light pumping semiconductor laser 7 with semiconductor laser 1.For example, when semiconductor laser 1 is 1064nm, when light pumping semiconductor laser 7 is 976nm or 915nm, gain fibre 6 is Yb dosed optical fiber; When semiconductor laser 1 is 1550nm, when light pumping semiconductor laser 7 is 976nm or 1480nm, gain fibre 6 is Er-doped fiber.The laser of exporting through gain fibre 6 is by after fiber coupler 3, from the output output of fiber coupler 3.
The output wavelength of light pumping semiconductor laser 7 is mated with the absorption spectra of gain fibre 6.
Output end connector 8 can adopt FC-APC joint or FC-PC joint.
Operation principle of the present utility model is:
Fiber coupler 3, fibre optic isolater 4, gain fibre 6 sequentially connect to form loop, by fiber coupler 3 light splitting Output of lasers, form annular chamber full-optical-fiber laser.The utility model adopts triangular pulse current drives DFB narrow linewidth semiconductor laser to realize the high-velocity scanning output of laser frequency, now the laser power of output is that triangular wave distributes, and the triangular wave sweeping laser of generation is injected into and in all optical fiber ring cavity laser, carries out frequency injection locking.The frequency of the DFB narrow linewidth semiconductor laser of the frequency of whole system Output of laser and injection is consistent, the power of Output of laser is determined by the parameter of all optical fiber ring cavity laser, power output is highly stable, and the power of DFB narrow linewidth semiconductor laser distributes irrelevant.The final high speed sweeping laser output that obtains stable output power.
Claims (9)
1. a high-speed wideband narrow linewidth frequency sweep full-optical-fiber laser, is characterized in that: described high-speed wideband narrow linewidth frequency sweep full-optical-fiber laser comprises semiconductor laser, semiconductor laser drive current source, fiber coupler, fibre optic isolater, optical fibre wavelength division multiplexer, gain fibre, light pumping semiconductor laser and output end connector; Described semiconductor laser drive current source is connected with semiconductor laser, described semiconductor laser incoming fiber optic coupler; Described fiber coupler is successively by fibre optic isolater, optical fibre wavelength division multiplexer, gain fibre and fiber coupler access output end connector; Described light pumping semiconductor laser incoming fiber optic wavelength division multiplexer.
2. high-speed wideband narrow linewidth frequency sweep full-optical-fiber laser according to claim 1, is characterized in that: described fiber coupler is 2 × 2 fiber couplers.
3. high-speed wideband narrow linewidth frequency sweep full-optical-fiber laser according to claim 2, is characterized in that: described 2 × 2 fiber couplers comprise two input ports and two output ports; Described semiconductor laser and gain fibre access respectively two input ports of 2 × 2 fiber couplers; Two output ports of described 2 × 2 fiber couplers access respectively output end connector and fibre optic isolater.
4. according to the high-speed wideband narrow linewidth frequency sweep full-optical-fiber laser described in claim 1 or 2 or 3, it is characterized in that: described gain fibre is the clad doped optical fiber of single mode list.
5. high-speed wideband narrow linewidth frequency sweep full-optical-fiber laser according to claim 4, is characterized in that: the absorption spectra of the clad doped optical fiber of described single mode list and the output wavelength of light pumping semiconductor laser match.
6. high-speed wideband narrow linewidth frequency sweep full-optical-fiber laser according to claim 5, is characterized in that: the emission spectra of the clad doped optical fiber of described single mode list and the output wavelength of semiconductor laser match.
7. high-speed wideband narrow linewidth frequency sweep full-optical-fiber laser according to claim 4, is characterized in that: described semiconductor laser is DFB narrow linewidth semiconductor laser.
8. high-speed wideband narrow linewidth frequency sweep full-optical-fiber laser according to claim 7, is characterized in that: described semiconductor laser is the DFB narrow linewidth semiconductor laser of coupling fiber output.
9. high-speed wideband narrow linewidth frequency sweep full-optical-fiber laser according to claim 4, is characterized in that: described output end connector is FC-APC joint or FC-PC joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320784023.7U CN203690693U (en) | 2013-11-29 | 2013-11-29 | High-speed broadband narrow linewidth swept all fiber laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320784023.7U CN203690693U (en) | 2013-11-29 | 2013-11-29 | High-speed broadband narrow linewidth swept all fiber laser |
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| CN203690693U true CN203690693U (en) | 2014-07-02 |
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| CN201320784023.7U Expired - Lifetime CN203690693U (en) | 2013-11-29 | 2013-11-29 | High-speed broadband narrow linewidth swept all fiber laser |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730820A (en) * | 2013-11-29 | 2014-04-16 | 中国科学院西安光学精密机械研究所 | High-speed-broadband narrow-line-width frequency-sweeping full-fiber laser |
| CN104300358A (en) * | 2014-09-22 | 2015-01-21 | 江苏骏龙电力科技股份有限公司 | Narrow linewidth laser light source for wide-range phase continuous frequency sweeping |
| US11901699B2 (en) | 2020-11-20 | 2024-02-13 | Suzhou Institute Of Nano-Tech And Nano-Bionics (Sinano) , Chinese Academy Of Sciences | Narrow linewidth laser |
-
2013
- 2013-11-29 CN CN201320784023.7U patent/CN203690693U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730820A (en) * | 2013-11-29 | 2014-04-16 | 中国科学院西安光学精密机械研究所 | High-speed-broadband narrow-line-width frequency-sweeping full-fiber laser |
| CN104300358A (en) * | 2014-09-22 | 2015-01-21 | 江苏骏龙电力科技股份有限公司 | Narrow linewidth laser light source for wide-range phase continuous frequency sweeping |
| US11901699B2 (en) | 2020-11-20 | 2024-02-13 | Suzhou Institute Of Nano-Tech And Nano-Bionics (Sinano) , Chinese Academy Of Sciences | Narrow linewidth laser |
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| C14 | Grant of patent or utility model | ||
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