CN101132103A - Single longitudinal mode optical fiber laser based on Fabry-Perot resonant cavity - Google Patents
Single longitudinal mode optical fiber laser based on Fabry-Perot resonant cavity Download PDFInfo
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- CN101132103A CN101132103A CNA2007100451773A CN200710045177A CN101132103A CN 101132103 A CN101132103 A CN 101132103A CN A2007100451773 A CNA2007100451773 A CN A2007100451773A CN 200710045177 A CN200710045177 A CN 200710045177A CN 101132103 A CN101132103 A CN 101132103A
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Abstract
Single-longitudinal mode optical fiber laser comprises: a laser amplifier, a single direction isolator, 30/70 coupler polarization controller, erbium-doped optical fiber, optical fiber ring and Brag optical grating. The connections are: the output end of the laser amplifier, via the 70% port of the 30/70 coupler, is connected with one end of the polarization controller, the other end of which controller, via erbium-doped optical fiber, is connected with one end of the optical fiber ring; the other end of the ring is connected with the wave-length selection Brag optical grating; the wave-coupling end of the 30/70 coupler is connected with the input end of the single direction isolator; the output end of the isolator is connected with the input end of the amplifier. This inventive device output power is 867 mV, wave length is 1.565 um single longitudinal laser, its SNR is over 40 dB, pumping rate is more than 17.6%.
Description
Technical field
What the present invention relates to is the laser in a kind of optical communication technology field, is specifically related to a kind of single-longitudinal-mode fiber laser based on Fabry-Perot resonant cavity.
Background technology
Rapid growth along with optical communication and fiber optic sensor technology, single longitudinal mode laser, particularly the demand of the high-power single-longitudinal-mode fiber laser of power more than 100mW is increasing, in the coherent optical communication field, public wireless television system, interferometry transducer and field of video transmission, high-power single-longitudinal-mode fiber laser has obtained application more and more widely.Though the fiber laser of kilowatt magnitude also appears in the newspapers, these lasers often operate under the state of many longitudinal modes, and the development of high-power single-longitudinal-mode fiber laser is not rapid.Simultaneously, the power output of single-longitudinal-mode fiber laser has also run into bottleneck.In general, the power output of single-longitudinal-mode fiber laser can reach 100mW at most.
Find through literature search prior art, " the high power fiber laser power output surpasses 1.2kW " that Zhao Hong etc. delivered on the 1359th page of " Chinese laser " 2006 the 10th phase, proposing to carry out high-precision rubbing down by two end faces to optical fiber in this article handles, the Fresnel reflection that utilizes fiber end face is as the output cavity mirror, by the laser of dichroic mirror coupling output up to 1.2KW.The high power laser deficiency of above structure is: laser operation is under the state of many longitudinal modes, and complex structure.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, a kind of single-longitudinal-mode fiber laser based on Fabry-Perot resonant cavity is provided, make it can widen the interval of longitudinal mode in the resonant cavity, reduce the longitudinal mode number of resonance, play the purpose that suppresses longitudinal mode, and use the Er-doped fiber of no pumping to do saturated absorption, with the realization of bonding longitudinal mode.
The present invention is achieved by the following technical solutions, the present invention includes: laser amplifier, one-way isolator, 30/70 coupler, Polarization Controller (PC), Er-doped fiber (EDF), fiber optic loop, Bragg grating (FBG), annexation is: the output of laser amplifier links to each other with Polarization Controller one end through 70% port of 30/70 coupler, the Polarization Controller other end is connected to fiber optic loop one end by Er-doped fiber, the fiber optic loop other end selects Bragg grating to link to each other with wavelength, the ripple end that closes of 30/70 coupler links to each other with the one-way isolator input, and the one-way isolator output links to each other with the laser amplifier input.
Described laser amplifier, comprise: double clad erbium/ytterbium codope optical fiber, the diode laser of longitudinal mode more than first, the diode laser of longitudinal mode more than second, first wavelength division multiplexer, second wavelength division multiplexer, the diode laser of longitudinal mode more than first links to each other with double clad erbium/ytterbium codope optical fiber with second wavelength division multiplexer by first wavelength division multiplexer respectively with the diode laser of longitudinal mode more than second.
30% port of described 30/70 coupler is the output of whole system.
Described fiber optic loop is made up of 10% end welding of two 10/90 couplers, as Fabry-Perot resonant cavity, widens the interval of longitudinal mode in the chamber, obtains the output of single longitudinal mode laser with the Er-doped fiber of saturated absorbing body.
Described Bragg grating is used for selecting the suitable wavelengths of spontaneous emission light, and spontaneous emission light is through the reflection of Bragg grating, and resonant cavity is set up in transmission in the other direction.
The above all connection medium is optical fiber.
When the present invention works, the diode laser of longitudinal mode more than first is sent in double clad erbium/ytterbium codope optical fiber through first wavelength division multiplexer and second wavelength division multiplexer that links to each other with them respectively with the pump light that the diode laser of longitudinal mode more than second sends, make erbium/ytterbium ion induced transition to high level, thereby generation spontaneous emission light, spontaneous emission light transmits to 30/70 coupler, by 30/70 coupler, 70% port input polarization controller, Polarization Controller is selected polarization state, then spontaneous emission light transfers to Er-doped fiber, the Er-doped fiber of pumping is not as the light intensity of other longitudinal modes beyond the saturated absorption bulk absorption zero-frequency, produce the output of single longitudinal mode, output to fiber optic loop; Fiber optic loop is used for widening the interval of longitudinal mode in the chamber, reduce the longitudinal mode number of chamber interior resonance, spontaneous emission light outputs to Bragg grating afterwards, Bragg grating is used for selecting the suitable wavelengths of spontaneous emission light, and utilize its emission mechanism, set up resonant cavity, because Bragg grating is to the spontaneous radiation reflection of light, spontaneous emission light is to reverse transfer, the ripple end that closes by 30/70 coupler is transferred to one-way isolator, by the buffer action of one-way isolator, the light one-way transmission in the resonant cavity is got back to the input of laser amplifier.Total forms loop configuration, and light ceaselessly amplifies in laser amplifier, finally obtains powerful output.All spontaneous emission lights that are exaggerated are all from the 30% port output of 30/70 coupler of system at last.
Compared with prior art, the present invention adds fiber optic loop in high power laser, plays the effect of " Fabry-Perot " resonant cavity, thereby obtains the output of the very high single longitudinal mode laser of power under the assistance of saturated absorbing body.The present invention obtains the laser that output wavelength is 1565nm at last, and high workload is in the power output of 867mW, and pumping efficiency has surpassed 17.6%, and the present invention is simple in structure and with low cost, satisfies the requirement of long-distance optical communication engineering and coherent laser radar.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the structural representation of fiber optic loop of the present invention;
Fig. 3 the present invention is in the power output and combination pumping energy relationship figure (a) and spectrogram (b) of the test of 1565nm place;
The single longitudinal mode ideograph that Fig. 4 the present invention records under the test of radio frequency analyzer.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated: present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed execution mode and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, present embodiment comprises: laser amplifier 1, one-way isolator 7,30/70 coupler 8, Polarization Controller (PC) 9, Er-doped fiber (EDF) 10, fiber optic loop 11, Bragg grating (FBG) 12, annexation is: the output of laser amplifier 1 links to each other with Polarization Controller 9 one ends through 70% port of 30/70 coupler 8, Polarization Controller 9 other ends are connected to fiber optic loop 11 1 ends by Er-doped fiber 10, fiber optic loop 11 other ends link to each other with Bragg grating 12, the ripple end that closes of 30/70 coupler 8 links to each other with one-way isolator 7 inputs, and one-way isolator 7 outputs link to each other with laser amplifier 1 input.
Described laser amplifier 1, comprise: double clad erbium/ytterbium codope optical fiber 2, the diode laser of longitudinal mode more than first 3, the diode laser of longitudinal mode more than second 4, first wavelength division multiplexer 5, second wavelength division multiplexer longitudinal mode more than 6, the first diode laser 3 and the diode laser of longitudinal mode more than second 4 link to each other with double clad erbium/ytterbium codope optical fiber 2 with second wavelength division multiplexer 6 by first wavelength division multiplexer 5 respectively.
30% port of described 30/70 coupler 8 is the output of whole system.
Described fiber optic loop 11 is made up of 10% end welding of two 10/90 couplers, as Fabry-Perot resonant cavity, widens the interval of chamber longitudinal mode, obtains the output of single longitudinal mode laser with the Er-doped fiber 10 of saturated absorbing body.
Described Bragg grating 12 is used for selecting the suitable wavelengths of spontaneous emission light, and spontaneous emission light is through the reflection of Bragg grating 12, and resonant cavity is set up in transmission in the other direction.
The above all connection medium is optical fiber.
Described Er-doped fiber 10 is the Er-doped fiber of no pumping, and erbium ion concentration is 240-ppm.
Described Er-doped fiber 10, its length are 3 meters.
During present embodiment work, the diode laser of longitudinal mode more than first 3 is sent in double clad erbium/ytterbium codope optical fiber 2 through first wavelength division multiplexer 5 and second wavelength division multiplexer 6 that links to each other with them respectively with the pump light that the diode laser of longitudinal mode more than second 4 sends, make erbium/ytterbium ion induced transition to high level, thereby produce spontaneous radiation.Spontaneous emission light transmits to 30/70 coupler, by its 70% port, and input polarization controller 9, suitable polarization state is selected in acting as of this Polarization Controller 9; Then optical transmission to length is that 3 meters, the erbium ion concentration of not pumping are the Er-doped fiber 10 of 240-ppm, and the Er-doped fiber 10 of no pumping is as the light intensity of saturated absorption bulk absorption zero-frequency other longitudinal modes in addition, the output of generation single longitudinal mode; Ensuing fiber optic loop 11 is used for widening the interval of longitudinal mode in the chamber, reduces the longitudinal mode number of chamber interior resonance; Bragg grating 12 afterwards is used for selecting suitable wavelengths, and utilizes its emission mechanism, sets up resonant cavity; Buffer action by one-way isolator 7 at last, the light one-way transmission in the optical cavity is got back to the input of laser amplifier.Total forms loop configuration, and light ceaselessly amplifies in laser amplifier, finally obtains powerful output.All spontaneous emission lights that are exaggerated are all from the 30% port output of 30/70 coupler 7 of system at last.
As shown in Figure 2, be the structural representation of the fiber optic loop 11 of present embodiment.Fiber optic loop 11 is that two 10/90 coupler cascades form, port a is an input, and port b is an output, port c, d is 90% end of coupler, keep not welding of original state, 10% end of two 10/90 couplers is welded together, in addition with input port a, b is welded together at the port of the same side, fiber optic loop 11 has played the effect of " Fabry-Perot " resonant cavity, has widened longitudinal mode spacing in the chamber, reduces longitudinal mode density.
As shown in Figure 3, figure (a) is the power output and combination pumping energy relationship figure that present embodiment records under the power meter test; The spectrum of the ring laser that figure (b) records under the spectroanalysis instrument test.When pumping reached 4500mA, output intensity had surpassed 867mW, the sexual intercourse of output intensity retention wire, and pumping efficiency has surpassed 17.6%.The centre wavelength of laser is the reflection peak place of used Bragg grating 12 at the 1565nm place, meets the wavelength of International Telecommunications Union's C-band, has obtained surpassing the output of the signal to noise ratio of 40dB.
As shown in Figure 4, be the single longitudinal mode ideograph that present embodiment records at the radio frequency analyzer, the single longitudinal mode running is confirmed by spectrum analyzer.
According to above-mentioned condition, present embodiment gained test result is shown in Fig. 3,4.Test result shows, the present invention guarantees the least possible longitudinal mode number by use fiber optic loop 11 in annular chamber, adds the selection of 12 pairs of wavelength of Bragg grating, and saturated absorbing body, also have the use of laser amplifier 1, designed the full optical fiber ring laser of a kind of single longitudinal mode high power.The high workload of this laser and obtains surpassing the signal to noise ratio of 40dB on the power output of 867mW, pumping efficiency has surpassed 17.6%.
Claims (7)
1. single-longitudinal-mode fiber laser based on Fabry-Perot resonant cavity, comprise: one-way isolator, Polarization Controller, fiber optic loop, laser amplifier, it is characterized in that, also comprise: 30/70 coupler, Er-doped fiber, Bragg grating, the output of laser amplifier links to each other with Polarization Controller one end through 70% port of 30/70 coupler, the Polarization Controller other end is connected to fiber optic loop one end by Er-doped fiber, the fiber optic loop other end selects Bragg grating to link to each other with wavelength, the ripple end that closes of 30/70 coupler links to each other with the one-way isolator input, and the one-way isolator output links to each other with the laser amplifier input.
2. the single-longitudinal-mode fiber laser based on Fabry-Perot resonant cavity according to claim 1, it is characterized in that, described fiber optic loop, 10% end welding by two 10/90 couplers is formed, as Fabry-Perot resonant cavity, widen the interval of longitudinal mode in the chamber, obtain the output of single longitudinal mode laser with Er-doped fiber as saturated absorbing body.
3. the single-longitudinal-mode fiber laser based on Fabry-Perot resonant cavity according to claim 1 is characterized in that, described Bragg grating, be used for selecting the spontaneous radiation light wavelength, spontaneous emission light is through the reflection of Bragg grating, and resonant cavity is set up in transmission in the other direction.
4. the single-longitudinal-mode fiber laser based on Fabry-Perot resonant cavity according to claim 1, it is characterized in that, described laser amplifier, comprise: double clad erbium/ytterbium codope optical fiber, the diode laser of longitudinal mode more than first, the diode laser of longitudinal mode more than second, first wavelength division multiplexer, second wavelength division multiplexer, the diode laser of longitudinal mode more than first links to each other with double clad erbium/ytterbium codope optical fiber with second wavelength division multiplexer by first wavelength division multiplexer respectively with the diode laser of longitudinal mode more than second.
5. the single-longitudinal-mode fiber laser based on Fabry-Perot resonant cavity according to claim 1 is characterized in that, described Er-doped fiber is the Er-doped fiber of no pumping, and erbium ion concentration is 240-ppm.
6. the single-longitudinal-mode fiber laser based on Fabry-Perot resonant cavity according to claim 1 is characterized in that, 30% port of described 30/70 coupler is the output of whole device.
7. the single-longitudinal-mode fiber laser based on Fabry-Perot resonant cavity according to claim 1 is characterized in that, all connect medium and are optical fiber.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007100451773A CN101132103A (en) | 2007-08-23 | 2007-08-23 | Single longitudinal mode optical fiber laser based on Fabry-Perot resonant cavity |
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| CNA2007100451773A CN101132103A (en) | 2007-08-23 | 2007-08-23 | Single longitudinal mode optical fiber laser based on Fabry-Perot resonant cavity |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800392A (en) * | 2010-03-10 | 2010-08-11 | 奇瑞汽车股份有限公司 | Nanosecond pulse optical fiber laser and control method thereof |
| CN102074880A (en) * | 2010-12-20 | 2011-05-25 | 北京交通大学 | Single-mode fiber laser with mini resonance cavity structure |
| CN101771234B (en) * | 2010-01-26 | 2011-09-21 | 奇瑞汽车股份有限公司 | Nanosecond pulse optical fiber laser and control method thereof |
| CN102231008A (en) * | 2011-06-20 | 2011-11-02 | 哈尔滨工程大学 | Tunable fiber integrated optical frequency comb |
| CN103208725A (en) * | 2012-01-12 | 2013-07-17 | 中国科学技术大学 | Two-way reciprocal single longitudinal mode fiber ring cavity laser |
| CN104143756A (en) * | 2014-07-28 | 2014-11-12 | 奉化市宇创产品设计有限公司 | Microchip laser of gain switch |
| CN105359356A (en) * | 2013-06-03 | 2016-02-24 | Ipg光子公司 | Multimode fabry-perot fiber laser |
| CN108512024A (en) * | 2018-06-14 | 2018-09-07 | 苏州诺联芯电子科技有限公司 | Tunable single longitudinal mode optical-fiber laser, gas concentration detection apparatus and method |
| CN109473862A (en) * | 2018-11-13 | 2019-03-15 | 武汉光迅科技股份有限公司 | A kind of L-band fiber amplifier of balanced pumping |
| CN109787074A (en) * | 2019-03-12 | 2019-05-21 | 北京邮电大学 | A kind of single mode narrow linewidth optical fiber laser based on double fiber coupling rings and saturated absorbing body |
| CN112448255A (en) * | 2020-11-23 | 2021-03-05 | 长飞光纤光缆股份有限公司 | High-performance polarization maintaining EDFA (erbium doped fiber amplifier) light path |
| US11484972B2 (en) | 2016-09-23 | 2022-11-01 | Ipg Photonics Corporation | Pre-welding analysis and associated laser welding methods and fiber lasers utilizing pre-selected spectral bandwidths that avoid the spectrum of an electronic transition of a metal/alloy vapor |
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2007
- 2007-08-23 CN CNA2007100451773A patent/CN101132103A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101771234B (en) * | 2010-01-26 | 2011-09-21 | 奇瑞汽车股份有限公司 | Nanosecond pulse optical fiber laser and control method thereof |
| CN101800392A (en) * | 2010-03-10 | 2010-08-11 | 奇瑞汽车股份有限公司 | Nanosecond pulse optical fiber laser and control method thereof |
| CN101800392B (en) * | 2010-03-10 | 2012-06-27 | 奇瑞汽车股份有限公司 | Nanosecond pulse optical fiber laser and control method thereof |
| CN102074880A (en) * | 2010-12-20 | 2011-05-25 | 北京交通大学 | Single-mode fiber laser with mini resonance cavity structure |
| CN102231008A (en) * | 2011-06-20 | 2011-11-02 | 哈尔滨工程大学 | Tunable fiber integrated optical frequency comb |
| CN102231008B (en) * | 2011-06-20 | 2013-02-06 | 哈尔滨工程大学 | Tunable fiber integrated optical frequency comb |
| CN103208725B (en) * | 2012-01-12 | 2015-06-24 | 中国科学技术大学 | Two-way reciprocal single longitudinal mode fiber ring cavity laser |
| CN103208725A (en) * | 2012-01-12 | 2013-07-17 | 中国科学技术大学 | Two-way reciprocal single longitudinal mode fiber ring cavity laser |
| CN105359356A (en) * | 2013-06-03 | 2016-02-24 | Ipg光子公司 | Multimode fabry-perot fiber laser |
| CN105359356B (en) * | 2013-06-03 | 2019-11-15 | Ipg光子公司 | Multimode Fabry-Perot fiber optic laser |
| CN104143756A (en) * | 2014-07-28 | 2014-11-12 | 奉化市宇创产品设计有限公司 | Microchip laser of gain switch |
| US11484972B2 (en) | 2016-09-23 | 2022-11-01 | Ipg Photonics Corporation | Pre-welding analysis and associated laser welding methods and fiber lasers utilizing pre-selected spectral bandwidths that avoid the spectrum of an electronic transition of a metal/alloy vapor |
| CN108512024A (en) * | 2018-06-14 | 2018-09-07 | 苏州诺联芯电子科技有限公司 | Tunable single longitudinal mode optical-fiber laser, gas concentration detection apparatus and method |
| CN109473862A (en) * | 2018-11-13 | 2019-03-15 | 武汉光迅科技股份有限公司 | A kind of L-band fiber amplifier of balanced pumping |
| CN109787074A (en) * | 2019-03-12 | 2019-05-21 | 北京邮电大学 | A kind of single mode narrow linewidth optical fiber laser based on double fiber coupling rings and saturated absorbing body |
| CN112448255A (en) * | 2020-11-23 | 2021-03-05 | 长飞光纤光缆股份有限公司 | High-performance polarization maintaining EDFA (erbium doped fiber amplifier) light path |
| CN112448255B (en) * | 2020-11-23 | 2022-09-30 | 长飞光纤光缆股份有限公司 | High-performance polarization maintaining EDFA (erbium doped fiber amplifier) light path |
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