CN103208725A - Two-way reciprocal single longitudinal mode fiber ring cavity laser - Google Patents
Two-way reciprocal single longitudinal mode fiber ring cavity laser Download PDFInfo
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- CN103208725A CN103208725A CN2012100094245A CN201210009424A CN103208725A CN 103208725 A CN103208725 A CN 103208725A CN 2012100094245 A CN2012100094245 A CN 2012100094245A CN 201210009424 A CN201210009424 A CN 201210009424A CN 103208725 A CN103208725 A CN 103208725A
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Abstract
The invention discloses a two-way reciprocal single longitudinal mode fiber ring cavity laser. The two-way reciprocal single longitudinal mode fiber ring cavity laser comprises a rare-earth-doped fiber (101) which is subjected to torsion processing, a first polarization controller (102), a first polarization converter (103), a narrow-band filter (104), an output coupler (105), a two-way line polarizer (110), a fine filter (112), a wavelength division multiplexer (113), a second polarization converter (114), a second polarization controller (115), a pump laser (111), a first isolator (106), a second isolator (109), a third polarization controller (107) and a fourth polarization controller (108). The two-way reciprocal single longitudinal mode fiber ring cavity laser can effectively eliminate the spatial hole-burning effect, reduce the usage of circularly-polarized light, reduce the systematic research and development risk, and reduce the influence of polarization state disturbance caused by environmental changes on the system stability, thereby improving the performance of the two-way reciprocal single longitudinal mode fiber ring cavity laser.
Description
Technical field
The present invention relates to technical field of optical fiber communication, relate in particular to a kind of two-way reciprocity single-longitudinal mode optical fiber ring cavity laser.
Background technology
At present, advantages such as in technical field of optical fiber communication, that doped fiber ring laser has is with low cost, compact conformation, anti-electromagnetic interference have widely at Fibre Optical Sensor, remote sensing and fiber optic communication field and to use.When the two-beam of transmission forms standing wave in opposite directions in the gain fibre, effects of spatial can take place, this effect can form gain grating in gain fibre, and the two-beam that causes propagating in opposite directions is coupled, and then causes effects such as many longitudinal modes, mode competition.So, if will obtain two-way single longitudinal mode laser, then must suppress effects of spatial.
In the prior art scheme, the two-way single-longitudinal mode erbium doping optical fibre annular cavity laser of linear polarization and the two-way single-longitudinal mode erbium doping optical fibre annular cavity laser of circular polarization have been realized respectively.For the two-way single-longitudinal mode erbium doping optical fibre annular cavity laser of linear polarization, owing to use nonreciprocal device to produce mutually orthogonal linearly polarized light, the light path difference that suitable last two orhtogonal linear polarizaiton light are counterclockwise passed by, therefore laser is along the eigenfrequency difference on the counterclockwise both direction, there is frequency offset, (as variations in temperature) can cause the frequency offset fluctuation when external environment changes like this, and then influences frequency stability and the range of application of laser.
And for the two-way single-longitudinal mode erbium doping optical fibre annular cavity laser of circular polarization, generally need reverse processing to the tail optical fiber of all devices, protect inclined to one side ability to obtain certain circle, immaturely caused that the circular polarization of light attitude can not well keep in the annular chamber and optical fiber circle is protected inclined to one side technology and device, be subject to Effect of Environmental such as vibrations, temperature, and then influence the stability of system.
Summary of the invention
The purpose of this invention is to provide a kind of two-way reciprocity single-longitudinal mode optical fiber ring cavity laser, can effectively suppress effects of spatial, reduce the use of circularly polarized light, reduce the system research and development risk, and reduce polarization state disturbance that environmental change causes to the influence of the stability of a system, improved the performance of doped fiber ring laser.
The objective of the invention is to be achieved through the following technical solutions:
A kind of two-way reciprocity single-longitudinal mode optical fiber ring cavity laser, described doped fiber ring laser comprises the rare-earth doped optical fibre of handling through reversing (101), first Polarization Controller (102), first polarization converter (103), narrow band filter (104), output coupler (105), the bidirectional lines polarizer (110), meticulous filter (112), wavelength division multiplexer (113), second polarization converter (114), second Polarization Controller (115), pump laser (111), first isolator (106), second isolator (109), the 3rd Polarization Controller (107) and the 4th Polarization Controller (108), wherein:
In described rare-earth doped optical fibre (101) in opposite directions transmission be two bundle same frequencys, with the circularly polarized light of polarization state, in described rare-earth doped optical fibre (101) part in addition, in opposite directions transmission be two bundle same frequencys, with the linearly polarized light of polarization state;
One end of described first Polarization Controller (102) links to each other with an end of described rare-earth doped optical fibre (101), is used for the circular polarization state of the described rare-earth doped optical fibre of meticulous adjusting (101);
One end of described first polarization converter (103) links to each other with the other end of described first Polarization Controller (102), is used for the mutual conversion between realization linear polarization and the circular polarization state;
One end of described narrow band filter (104) links to each other with the other end of described first polarization converter (103), is used for realizing the single peak narrowband filter function;
Described output coupler (105) comprises four ports, and wherein two ports are as input, and two other port is as output, and this output coupler (105) links to each other with the other end of described narrow band filter (104) as a port of input;
One end of the described bidirectional lines polarizer (110) links to each other with described output coupler (105) another port as input, is used for realizing that the bidirectional lines polarization state rises partially;
One end of described meticulous filter (112) links to each other with the other end of the described bidirectional lines polarizer (110), described narrow band filter (104) and described meticulous filter (112) are as composite filter, be used for the common optical frequency utmost point narrow-band filtering of realizing, obtain single longitudinal mode laser;
One end of described wavelength division multiplexer (113) links to each other with the other end of described meticulous filter (112), is used for pumping laser is coupled into optic fiber ring-shaped cavity;
One end of described second polarization converter (114) links to each other with the other end of described wavelength division multiplexer (113), is used for the mutual conversion between realization linear polarization and the circular polarization state;
One end of described second Polarization Controller (115) links to each other with the other end of described second polarization converter (114), the other end of described second Polarization Controller (115) links to each other with the other end of described rare-earth doped optical fibre (101), is used for the circular polarization state of the described rare-earth doped optical fibre of meticulous adjusting (101);
Described pump laser (111) links to each other with the pumping input of described wavelength division multiplexer (113), for generation of pumping laser;
One end of described first isolator (106) links to each other with the port of described output coupler (105) as output, is used for isolating the reverberation of this output outgoing;
One end of described second isolator (109) links to each other with described output coupler (105) another port as output, is used for isolating the reverberation of this another output outgoing;
One end of described the 3rd Polarization Controller (107) links to each other with the other end of described first isolator (106), is used for regulating described first isolator (106) output polarization state of light, and what the other end of the 3rd Polarization Controller (107) was exported is clockwise laser;
One end of described the 4th Polarization Controller (108) links to each other with the other end of described second isolator (109), is used for regulating described second isolator (109) output polarization state of light, and what the other end of the 4th Polarization Controller (107) was exported is counterclockwise laser.
The annular chamber of described doped fiber ring laser is made of reciprocal device, and is identical along the laser eigenfrequency of counterclockwise both direction.
Described rare-earth doped optical fibre (101) is Er-doped fiber or erbium-ytterbium co-doped fiber, and uses line to protect the linear polarization that inclined to one side device keeps transmission light.
Described narrow band filter (104), output coupler (105), the bidirectional lines polarizer (110), meticulous filter (112) and wavelength division multiplexer (113) are line and protect inclined to one side device, and tail optical fiber is the line polarization maintaining optical fibre.
Described first polarization converter (103) is general single mode fiber with described second polarization converter (114) with the tail optical fiber that described rare-earth doped optical fibre (101) links to each other, and it is reversed processing, and other end tail optical fiber is single mode line polarization maintaining optical fibre.
Described narrow band filter (104) is the unimodal filter of transmission-type, two-way reciprocity work.
Described meticulous filter (112) is comb filter, constituted by first three-dB coupler (201) and second three-dB coupler (202), specifically comprise: optical fiber mach-Ceng Deer Mach-Zehnder comb filter, fiber annular cavity filter or optical fibre Fabry-perot Fabry-Perot cavity filter.
Described pump laser (111) adopts 980 nanometer nm pump laser diodes or 1480nm pump laser diode.
Described output coupler (105) is 90/10 coupler or 80/20 coupler.
As seen from the above technical solution provided by the invention, described doped fiber ring laser comprises the rare-earth doped optical fibre of handling through reversing (101), first Polarization Controller (102), first polarization converter (103), narrow band filter (104), output coupler (105), the bidirectional lines polarizer (110), meticulous filter (112), wavelength division multiplexer (113), second polarization converter (114), second Polarization Controller (115), pump laser (111), first isolator (106), second isolator (109), the 3rd Polarization Controller (107) and the 4th Polarization Controller (108).This doped fiber ring laser can effectively suppress effects of spatial, reduces the use of circularly polarized light, reduces the system research and development risk, and reduces polarization state disturbance that environmental change causes to the influence of the stability of a system, has improved the performance of doped fiber ring laser.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite of not paying creative work, can also obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 provides the structural representation of two-way reciprocity single-longitudinal mode optical fiber ring cavity laser for the embodiment of the invention;
Fig. 2 is along the change curve schematic diagram of counterclockwise power output with pump power during the embodiment of the invention gives an actual example;
Fig. 3 is the spectrum schematic diagram of clockwise output during the embodiment of the invention gives an actual example;
Fig. 4 is the spectrum schematic diagram of counterclockwise output during the embodiment of the invention gives an actual example;
Fig. 5 is used for verifying operating state and the suitable apparatus structure sketch of laser frequency counterclockwise during the embodiment of the invention gives an actual example;
Fig. 6 is the time domain sweep waveform schematic diagram of clockwise output during the embodiment of the invention gives an actual example;
Fig. 7 is the time domain sweep waveform schematic diagram of counterclockwise output during the embodiment of the invention gives an actual example;
Fig. 8 closes the time domain sweep waveform schematic diagram of restrainting after handling along exporting earlier counterclockwise by a three-dB coupler during the embodiment of the invention gives an actual example.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on embodiments of the invention, those of ordinary skills belong to protection scope of the present invention not making the every other embodiment that obtains under the creative work prerequisite.
The scheme that the linearly polarized light that the embodiment of the invention provides and circularly polarized light combine, can overcome the frequency offset fluctuation problem in the original linear polarization system, reduced the use of circularly polarized light, reduced the system research and development risk, reduced circular polarization state disturbance that environmental change causes to the influence of systematic function, below in conjunction with accompanying drawing the embodiment of the invention is described in further detail, each parts of present embodiment are shown in the drawings, wherein identical or similar label is represented identical or similar elements or the element with identical or similar functions from start to finish, and be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the present invention, and can not be interpreted as limitation of the present invention, being illustrated in figure 1 as the embodiment of the invention provides the structural representation of two-way reciprocity single-longitudinal mode optical fiber ring cavity laser, doped fiber ring laser among Fig. 1 comprises the rare-earth doped optical fibre of handling through reversing (101), first Polarization Controller (102), first polarization converter (103), narrow band filter (104), output coupler (105), the bidirectional lines polarizer (110), meticulous filter (112), wavelength division multiplexer (113), second polarization converter (114), second Polarization Controller (115), pump laser (111), first isolator (106), second isolator (109), the 3rd Polarization Controller (107) and the 4th Polarization Controller (108), wherein:
In described rare-earth doped optical fibre (101) in opposite directions the transmission be two the bundle same frequencys, with the circularly polarized light of polarization state, this two-beam can not interfere, and then can overcome the effects of spatial in the rare-earth doped optical fibre (101); In described rare-earth doped optical fibre (101) part in addition, in opposite directions transmission be two bundle same frequencys, with the linearly polarized light of polarization state, use line to protect the linear polarization that inclined to one side device keeps transmission light, can reduce polarization state disturbance that environmental change causes to the influence of the stability of a system.
In the specific implementation process, described rare-earth doped optical fibre (101) can be Er-doped fiber or erbium-ytterbium co-doped fiber etc., and reverses processing, to reduce environmental change to the wherein influence of the circularly polarized light polarization state of transmission.For example this rare-earth doped optical fibre (101) can be the long Liekki Er30-4/125 Er-doped fiber of 50cm, and has carried out reversing processing, and the rate of reversing is every meter 70 circle.
One end of described first Polarization Controller (102) links to each other with an end of described rare-earth doped optical fibre (101), is used for the circular polarization state of the described rare-earth doped optical fibre of meticulous adjusting (101).
One end of described first polarization converter (103) links to each other with the other end of described first Polarization Controller (102), is used for the mutual conversion between realization linear polarization and the circular polarization state.
One end of described narrow band filter (104) links to each other with the other end of described first polarization converter (103), be used for realizing the single peak narrowband filter function, specifically: described narrow band filter (104) can be the unimodal filter of transmission-type, two-way reciprocity work, for example this narrow band filter (104) can adopt the unimodal filter of transmission-type, its centre wavelength is 1550nm, and halfwidth is 0.2nm.
Described output coupler (105) comprises four ports, and wherein two ports are as input, and two other port is as output, and this output coupler (105) links to each other with the other end of described narrow band filter (104) as a port of input; In the specific implementation, this output coupler (105) can be 90/10 coupler or 80/20 coupler, and for example this output coupler (105) can be 90/10 coupler, and wherein 10% port is as two outputs.
One end of the described bidirectional lines polarizer (110) links to each other with described output coupler (105) another port as input, is used for realizing that the bidirectional lines polarization state rises partially.
One end of described meticulous filter (112) links to each other with the other end of the described bidirectional lines polarizer (110), described narrow band filter (104) and described meticulous filter (112) are as composite filter, be used for the common optical frequency utmost point narrow-band filtering of realizing, obtain single longitudinal mode laser; In specific implementation: described meticulous filter (112) can be comb filter, constituted by first three-dB coupler (201) and second three-dB coupler (202), for example can be by optical fiber mach-Ceng Deer Mach-Zehnder comb filter, fiber annular cavity filter or optical fibre Fabry-perot Fabry-Perot cavity filter are realized, specifically can constitute the meticulous filter of optical fiber Mach-Zehnder pectination (112) by first three-dB coupler (201) and second three-dB coupler (202), its arm length difference is 20cm, its free spectrum width is about 1GHz, and the three dB bandwidth of each passband is about 333MHz.
One end of described wavelength division multiplexer (113) links to each other with the other end of described meticulous filter (112), is used for pumping laser is coupled into optic fiber ring-shaped cavity.
One end of described second polarization converter (114) links to each other with the other end of described wavelength division multiplexer (113), is used for the mutual conversion between realization linear polarization and the circular polarization state.
One end of described second Polarization Controller (115) links to each other with the other end of described second polarization converter (114), the other end of described second Polarization Controller (115) links to each other with the other end of described rare-earth doped optical fibre (101), is used for the circular polarization state of the described rare-earth doped optical fibre of meticulous adjusting (101).
Described pump laser (111) links to each other with the pumping input of described wavelength division multiplexer (113), for generation of pumping laser; In the specific implementation, this pump laser (111) can be 980nm pump laser diode or 1480nm pump laser diode, its pumping input is 980nm input or 1480nm input, for example, if described wavelength division multiplexer (113) is the 980nm/1550nm wavelength division multiplexer, then pump laser (111) is the 980nm pump laser diode.
One end of described first isolator (106) links to each other with the port of described output coupler (105) as output, is used for isolating the reverberation of this output outgoing.
One end of described second isolator (109) links to each other with described output coupler (105) another port as output, is used for isolating the reverberation of this another output outgoing.
One end of described the 3rd Polarization Controller (107) links to each other with the other end of described first isolator (106), is used for regulating described first isolator (106) output polarization state of light, and what the other end of the 3rd Polarization Controller (107) was exported is clockwise laser.
One end of described the 4th Polarization Controller (108) links to each other with the other end of described second isolator (109), is used for regulating described second isolator (109) output polarization state of light, and what the other end of the 4th Polarization Controller (107) was exported is counterclockwise laser.
In addition, the annular chamber of whole doped fiber ring laser is made of reciprocal device, and is identical along the laser eigenfrequency of counterclockwise both direction, thereby overcomes the frequency offset fluctuation problem.Here, described reciprocal device refers to when excitation port and echo port transposition, the characteristic that response does not change to some extent because of this exchange.For two port devices, it is identical to the transmission characteristic of left port with right output port to the transmission characteristic of right output port to show as left port.
In addition, in the specific implementation process:
Above-mentioned narrow band filter (104), output coupler (105), the bidirectional lines polarizer (110), meticulous filter (112), wavelength division multiplexer (113) are line and protect inclined to one side device, and tail optical fiber is the line polarization maintaining optical fibre.
Above-mentioned first polarization converter (103) is general single mode fiber with second polarization converter (114) with the tail optical fiber that rare-earth doped optical fibre (101) links to each other, and it is reversed processing, other end tail optical fiber is single mode line polarization maintaining optical fibre, specifically can adopt full optical fiber quarter wave plate or the online quarter wave plate of discrete device to realize.
Come power output and the performance of above-mentioned two-way reciprocity single-longitudinal mode optical fiber ring cavity laser are described with instantiation below:
Be illustrated in figure 2 as the embodiment of the invention give an actual example in along counterclockwise power output with the change curve schematic diagram of pump power, from Fig. 2, find, pumping threshold along counterclockwise both direction is 7.3mW, because output is backward pump output clockwise, under the identical pump power, the power output of output is bigger than the power output of counterclockwise output clockwise.
When pump power is 33.1mW, careful first Polarization Controller (103) and second Polarization Controller (115) adjusted, can be so that along power output is suitable counterclockwise, record the spectrum of exporting along counterclockwise this moment, be illustrated in figure 3 as the spectrum schematic diagram of clockwise output, among Fig. 3: laser center wavelength is 1549.927nm, and the 3dB spectrum width is 0.014nm, and peak power is-25.2dBm; Be illustrated in figure 4 as the spectrum schematic diagram of counterclockwise output, among Fig. 4: laser center wavelength is 1549.922nm, and the 3dB spectrum width is 0.015nm, and peak power is-24.8dBm.
The two-way reciprocity single-longitudinal mode optical fiber ring cavity laser that further embodiment of the invention the is provided operating state that whether is in two-way single longitudinal mode is verified below, be illustrated in figure 5 as to verify operating state and the suitable apparatus structure sketch of laser frequency counterclockwise, adopt the scanning annular chamber (301) among Fig. 5 that suitable counterclockwise two outputs shown in Fig. 1 are scanned respectively, after the laser of scanning annular chamber (301) output passes through photodetector (302), waveform is presented on the oscilloscope (303), the free spectrum width of wherein said scanning annular chamber (301) is about 100MHz, and sweep limits (half scan period) is about 230MHz.
In the present embodiment given example, the chamber, full annular chamber of this two-way reciprocity single-longitudinal mode optical fiber ring cavity laser is long to be 4.4m, the annular chamber longitudinal mode spacing is 45MHz, and whole system is made of reciprocal device, consider the long 4.4m of being in chamber of whole laser annular chamber like this, laser annular chamber longitudinal mode spacing is 45MHz, if system works is at the single longitudinal mode state, then oscilloscope (303) go up per half scan period just should corresponding two absworption peaks, verify as foundation whether this doped fiber ring laser is in the operating state of two-way single longitudinal mode with this.
As Fig. 6 for the embodiment of the invention give an actual example in the clockwise time domain sweep waveform schematic diagram of output, among Fig. 6: per half scan period of correspondence, two absworption peaks are arranged on the sweep waveform; As Fig. 7 for the embodiment of the invention give an actual example in the counterclockwise time domain sweep waveform schematic diagram of output, among Fig. 7: per half scan period of correspondence, two absworption peaks are arranged on the sweep waveform.So seen from the above description, the two-way reciprocity single-longitudinal mode optical fiber ring cavity laser that provides of the embodiment of the invention is operated in two-way single longitudinal mode state really.
The two-way reciprocity single-longitudinal mode optical fiber ring cavity laser that further embodiment of the invention is provided again along identical checking the whether of laser frequency counterclockwise below, be illustrated in figure 8 as along exporting earlier counterclockwise and close the time domain sweep waveform schematic diagram of restrainting after handling by a three-dB coupler, the demo plant that adopts still as shown in Figure 5, just the input signal among Fig. 5 this moment become among Fig. 1 clockwise output and counterclockwise output close bundle by a three-dB coupler earlier, pass through the signal after the photodetector again, adjust the 3rd Polarization Controller (107) then and the 4th Polarization Controller (108) just can obtain time domain sweep waveform shown in Figure 8.From Fig. 8, can find, corresponding per half scan period, two absworption peaks are arranged on the sweep waveform, this means that along counterclockwise laser frequency be identical.
In sum, the embodiment of the invention can effectively suppress effects of spatial, reduce the use of circularly polarized light, reduce the system research and development risk, and reduce polarization state disturbance that environmental change causes to the influence of the stability of a system, can overcome simultaneously the frequency offset fluctuation problem in the original linear polarization system, improve the performance of doped fiber ring laser.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (9)
1. two-way reciprocity single-longitudinal mode optical fiber ring cavity laser, it is characterized in that, described doped fiber ring laser comprises the rare-earth doped optical fibre of handling through reversing (101), first Polarization Controller (102), first polarization converter (103), narrow band filter (104), output coupler (105), the bidirectional lines polarizer (110), meticulous filter (112), wavelength division multiplexer (113), second polarization converter (114), second Polarization Controller (115), pump laser (111), first isolator (106), second isolator (109), the 3rd Polarization Controller (107) and the 4th Polarization Controller (108), wherein:
In described rare-earth doped optical fibre (101) in opposite directions transmission be two bundle same frequencys, with the circularly polarized light of polarization state, in described rare-earth doped optical fibre (101) part in addition, in opposite directions transmission be two bundle same frequencys, with the linearly polarized light of polarization state;
One end of described first Polarization Controller (102) links to each other with an end of described rare-earth doped optical fibre (101), is used for the circular polarization state of the described rare-earth doped optical fibre of meticulous adjusting (101);
One end of described first polarization converter (103) links to each other with the other end of described first Polarization Controller (102), is used for the mutual conversion between realization linear polarization and the circular polarization state;
One end of described narrow band filter (104) links to each other with the other end of described first polarization converter (103), is used for realizing the single peak narrowband filter function;
Described output coupler (105) comprises four ports, and wherein two ports are as input, and two other port is as output, and this output coupler (105) links to each other with the other end of described narrow band filter (104) as a port of input;
One end of the described bidirectional lines polarizer (110) links to each other with described output coupler (105) another port as input, is used for realizing that the bidirectional lines polarization state rises partially;
One end of described meticulous filter (112) links to each other with the other end of the described bidirectional lines polarizer (110), described narrow band filter (104) and described meticulous filter (112) are as composite filter, be used for the common optical frequency utmost point narrow-band filtering of realizing, obtain single longitudinal mode laser;
One end of described wavelength division multiplexer (113) links to each other with the other end of described meticulous filter (112), is used for pumping laser is coupled into optic fiber ring-shaped cavity;
One end of described second polarization converter (114) links to each other with the other end of described wavelength division multiplexer (113), is used for the mutual conversion between realization linear polarization and the circular polarization state;
One end of described second Polarization Controller (115) links to each other with the other end of described second polarization converter (114), the other end of described second Polarization Controller (115) links to each other with the other end of described rare-earth doped optical fibre (101), is used for the circular polarization state of the described rare-earth doped optical fibre of meticulous adjusting (101);
Described pump laser (111) links to each other with the pumping input of described wavelength division multiplexer (113), for generation of pumping laser;
One end of described first isolator (106) links to each other with the port of described output coupler (105) as output, is used for isolating the reverberation of this output outgoing;
One end of described second isolator (109) links to each other with described output coupler (105) another port as output, is used for isolating the reverberation of this another output outgoing;
One end of described the 3rd Polarization Controller (107) links to each other with the other end of described first isolator (106), is used for regulating described first isolator (106) output polarization state of light, and what the other end of the 3rd Polarization Controller (107) was exported is clockwise laser;
One end of described the 4th Polarization Controller (108) links to each other with the other end of described second isolator (109), is used for regulating described second isolator (109) output polarization state of light, and what the other end of the 4th Polarization Controller (107) was exported is counterclockwise laser.
2. two-way reciprocity single-longitudinal mode optical fiber ring cavity laser as claimed in claim 1 is characterized in that the annular chamber of described doped fiber ring laser is made of reciprocal device, and is identical along the laser eigenfrequency of counterclockwise both direction.
3. two-way reciprocity single-longitudinal mode optical fiber ring cavity laser as claimed in claim 1 is characterized in that described rare-earth doped optical fibre (101) is Er-doped fiber or erbium-ytterbium co-doped fiber, and uses line to protect the linear polarization that inclined to one side device keeps transmission light.
4. two-way reciprocity single-longitudinal mode optical fiber ring cavity laser as claimed in claim 1, it is characterized in that, described narrow band filter (104), output coupler (105), the bidirectional lines polarizer (110), meticulous filter (112) and wavelength division multiplexer (113) are line and protect inclined to one side device, and tail optical fiber is the line polarization maintaining optical fibre.
5. two-way reciprocity single-longitudinal mode optical fiber ring cavity laser as claimed in claim 1, it is characterized in that, described first polarization converter (103) is general single mode fiber with described second polarization converter (114) with the tail optical fiber that described rare-earth doped optical fibre (101) links to each other, and it is reversed processing, and other end tail optical fiber is single mode line polarization maintaining optical fibre.
6. two-way reciprocity single-longitudinal mode optical fiber ring cavity laser as claimed in claim 1 is characterized in that, described narrow band filter (104) is the unimodal filter of transmission-type, two-way reciprocity work.
7. two-way reciprocity single-longitudinal mode optical fiber ring cavity laser as claimed in claim 1, it is characterized in that, described meticulous filter (112) is comb filter, constituted by first three-dB coupler (201) and second three-dB coupler (202), specifically comprise: optical fiber mach-Ceng Deer Mach-Zehnder comb filter, fiber annular cavity filter or optical fibre Fabry-perot Fabry-Perot cavity filter.
8. two-way reciprocity single-longitudinal mode optical fiber ring cavity laser as claimed in claim 1 is characterized in that, described pump laser (111) adopts 980 nanometer nm pump laser diodes or 1480nm pump laser diode.
9. two-way reciprocity single-longitudinal mode optical fiber ring cavity laser as claimed in claim 1 is characterized in that, described output coupler (105) is 90/10 coupler or 80/20 coupler.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106207724A (en) * | 2016-08-31 | 2016-12-07 | 暨南大学 | A kind of tunable single-frequency optical fiber laser and its implementation |
| CN110048303A (en) * | 2019-03-18 | 2019-07-23 | 深圳市速腾聚创科技有限公司 | A kind of laser and Optical Maser System |
| CN112202039A (en) * | 2020-09-15 | 2021-01-08 | 暨南大学 | Single-mode fiber ring laser and working method and system thereof |
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|---|---|---|---|---|
| US5420684A (en) * | 1989-12-22 | 1995-05-30 | The Charles Stark Draper Laboratory, Inc. | Resonant interferometer fiber optic gyroscope |
| CN101132103A (en) * | 2007-08-23 | 2008-02-27 | 上海交通大学 | Single longitudinal mode optical fiber laser based on Fabry-Perot resonant cavity |
-
2012
- 2012-01-12 CN CN201210009424.5A patent/CN103208725B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5420684A (en) * | 1989-12-22 | 1995-05-30 | The Charles Stark Draper Laboratory, Inc. | Resonant interferometer fiber optic gyroscope |
| CN101132103A (en) * | 2007-08-23 | 2008-02-27 | 上海交通大学 | Single longitudinal mode optical fiber laser based on Fabry-Perot resonant cavity |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106207724A (en) * | 2016-08-31 | 2016-12-07 | 暨南大学 | A kind of tunable single-frequency optical fiber laser and its implementation |
| CN106207724B (en) * | 2016-08-31 | 2018-10-09 | 暨南大学 | A kind of tunable single-frequency optical fiber laser and its implementation |
| CN110048303A (en) * | 2019-03-18 | 2019-07-23 | 深圳市速腾聚创科技有限公司 | A kind of laser and Optical Maser System |
| CN112202039A (en) * | 2020-09-15 | 2021-01-08 | 暨南大学 | Single-mode fiber ring laser and working method and system thereof |
| CN112202039B (en) * | 2020-09-15 | 2021-10-26 | 暨南大学 | Single-mode fiber ring laser, working method thereof and laser system |
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| CN103208725B (en) | 2015-06-24 |
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