CN201263040Y - Multi-wavelength and multipath single wavelength laser based on AWG and optical fiber grating - Google Patents
Multi-wavelength and multipath single wavelength laser based on AWG and optical fiber grating Download PDFInfo
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- CN201263040Y CN201263040Y CNU2008201084790U CN200820108479U CN201263040Y CN 201263040 Y CN201263040 Y CN 201263040Y CN U2008201084790 U CNU2008201084790 U CN U2008201084790U CN 200820108479 U CN200820108479 U CN 200820108479U CN 201263040 Y CN201263040 Y CN 201263040Y
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Abstract
The utility model relates to the fields of microwave photonics and optical fiber communication and discloses a multi-wavelength and multipath single-wavelength laser based on AWG and optical fiber gratings. Each end of 1 multiplied by N AWG (60) is connected with doped active optical fibers (20-2N), optical fiber gratings (10-1N) and WDMs (30-3N) in sequence. Pump lights (40-4N) are coupled with a branch end to the doped active optical fibers (20-2N) through WDMs (30-3N) from the one character end of AWG (60). N separate resonant cavities are formed by optical fiber gratings (11-1N) at the branch end and the optical fiber grating 10 at the one character end. The optical fiber grating (10) at the one character end is a sampling optical fiber grating or cascaded with a plurality of optical fiber gratings or wide broadband optical fiber gratings. N optical fiber gratings (11-1N) at the branch end are ordinary or polarization maintaining optical fibre gratings. Laser with N wavelengths is output from the one character end (50) and/or N-path single-wavelength laser is output from the branch ends (51-5N).
Description
Technical field
The present invention relates to optical fiber communication, microwave photon, Fibre Optical Sensor and fiber laser technology field, is a kind of multi-wavelength and multichannel single wavelength laser based on AWG and fiber grating specifically.
Background technology
Fiber-grating laser is a kind of up-and-coming light source in the optical fiber telecommunications system, its advantage is mainly reflected in: the wavelength of (1) semiconductor laser difficulty meets wavelength division multiplexing (WDM) standard of wavelength that International Telecommunications Union (ITU-T) advises, and cost is very high, and the rare-earth doped optical fibre grating laser utilizes the wavelength selectivity of fiber grating etc. can determine wavelength very exactly, and cost is very low.(2) as the rare-earth doped optical fibre manufacture craft comparative maturity of gain, rare earth ion doped process is simple, and fibre loss is little.(3) adopt the high pumping of dexterous compact efficient to become possibility.(4) fiber-grating laser has the waveguide type optical fiber structure, can produce higher power density at fiber core layer.Optical fiber structure has higher area-volume ratio, thereby radiating effect is better.Compatible good with standard traffic optical fiber can be adopted multiple fiber optic components such as fiber grating, coupler, reduces the demand of block optical element and the trouble of light path mechanical adjustment, greatly simplifies the design and the making of fiber-grating laser.(5) broadband is one of main development trend of optical fiber communication, and fiber-grating laser can be realized laser output by mixing different rare earth ions in the broadband range of 380～3900nm, and it is easy and tunable that wavelength is selected.(6) little, the anti-electromagnetic interference of the frequency chirp effect under the high frequency modulated, temperature expansion coefficient are little etc. than semiconductor laser.
Summary of the invention
Purpose of the present invention just is based on the multi-wavelength and the multichannel single wavelength laser of AWG and fiber grating, and it can overcome the deficiency of existing multi-wavelength optical fiber grating laser, realizes the stable practical multi-wavelength and the fiber laser of multi-path laser output.
The present invention proposes a kind of multi-wavelength and multichannel single wavelength laser based on AWG and fiber grating, comprising: the Waveguide array optical fiber (AWG) of a 1 * N, fiber grating are sampling optical-fiber grating or cascade fiber grating or band optical fiber grating, a N polarization-maintaining fiber grating or ordinary optic fibre grating, long doping Active Optical Fiber, a N+1 wavelength division multiplexer (WDM), the N+1 pump light of N+1 section 0.5～30m; Connection between them:
Connect one section doping Active Optical Fiber, sampling optical-fiber grating or cascade fiber grating or band optical fiber grating, WDM successively at the word end of AWG;
Divergent ends at AWG connects N section doping Active Optical Fiber, a N polarization-maintaining fiber grating or ordinary optic fibre grating, a N WDM successively;
Pump light is coupled in the doping Active Optical Fiber, and the fiber grating of divergent ends constitutes N independently resonant cavity with the fiber grating of the word end of AWG respectively, produces laser; N 〉=1.
The doping Active Optical Fiber is er-doped, mix ytterbium, mix holmium, thorium is mixed, mixed to the ytterbium erbium altogether, mix praseodymium or neodymium-doped fiber.
Beneficial effect of the present invention is specific as follows:
The doping Active Optical Fiber that existing dual wavelength fibre laser needs is inclined to one side for protecting, coupler also will be protected inclined to one side, and add the output that Polarization Detection guarantees dual wavelength single polarization fiber laser, perhaps need under low temperature such as liquid nitrogen, eliminate mode competition, produce dual wavelength; Generation to multi-wavelength is difficult more, and reliability is low, the cost height, and control is complicated, is difficult to practicality.
And the present invention adopts than protecting the much lower common Active Optical Fiber of inclined to one side Active Optical Fiber price as gain media, only needs polarization-maintaining fiber grating or/and the ordinary optic fibre grating guarantees that each laserresonator is independently.Because each laserresonator is independently, can eliminate conventional active ordinary optic fibre and produce the problem of the mode competition of dual wavelength, the stochastic model coupling can not appear.The present invention also can adopt Polarization Control to control polarization state, can obtain better laser quality.Because an end of fiber laser resonant cavity adopts sampling optical-fiber grating or cascade fiber grating or band optical fiber grating, make it easier to quasi-resonance with the reflection peak of resonant cavity other end fiber grating, reduced requirement to grating, than the easier realization of common multiple-wavelength laser, export multiwavelength laser more stable, that have higher cost performance.The parts that the present invention adopts can for protect inclined to one side or part inclined to one side for protecting, the present invention also has little, compact conformation affected by environment, characteristics such as easy to implement.
Description of drawings
Fig. 1 is that respectively there is one section doping Active Optical Fiber the both sides of AWG based on the multi-wavelength of AWG and fiber grating and multichannel single wavelength laser schematic diagram, and is two directional pump.
Fig. 2 is based on the multi-wavelength of AWG and fiber grating and multichannel single wavelength laser schematic diagram, and divergent ends one side of AWG has one section doping Active Optical Fiber, and in the unidirectional pumping of the divergent ends of AWG.
Fig. 3 is based on the multi-wavelength of AWG and fiber grating and multichannel single wavelength laser schematic diagram, and the word end of AWG has one section doping Active Optical Fiber, in the unidirectional pumping of a word end of AWG.
Among the figure: fiber grating 10, fiber grating 11-1N, doping Active Optical Fiber 20-2N, WDM30-3N, pump light 40-4N, AWG one word end 50, AWG divergent ends 51-5N, AWG60.
Embodiment
Below in conjunction with accompanying drawing multi-wavelength and multichannel single wavelength laser based on AWG and fiber grating are further described.
Embodiment one
As Fig. 1, based on the multi-wavelength and the multichannel single wavelength laser of AWG and fiber grating, the connection between the device of its formation:
Select the AWG 60 of a 1 * N, N=16.
Select the doping Active Optical Fiber 20 of 0.5m and the doping Active Optical Fiber 21～216 of 1.0m, doping Active Optical Fiber 20～216 is an Er-doped fiber.
Word end at AWG 60 connects doping Active Optical Fiber 20, fiber grating 10, WDM 30 successively.
Divergent ends at AWG 60 connects doping Active Optical Fiber 21～216, fiber grating 11～116, WDM31～316 successively.
16 independently the laser that produces of resonant cavity at AWG 60 1 word ends 16 wavelength lasers of 50 outputs or/and at divergent ends 51～516 outputs 16 tunnel single wavelength lasers.
Embodiment two
As Fig. 2, based on the multi-wavelength and the multichannel single wavelength laser of AWG and fiber grating, the connection between the device of its formation:
Select the AWG 60 of a 1 * N, N=32.
Select the doping Active Optical Fiber 21～232 of 1.5m, doping Active Optical Fiber 21～232 is a Yb dosed optical fiber.
Word end at AWG 60 connects fiber grating 10.
Divergent ends at AWG 60 connects doping Active Optical Fiber 21～232, fiber grating 11～132, WDM31～332 successively.
32 independently the laser that produces of resonant cavity at AWG 60 1 word ends 32 wavelength lasers of 50 outputs or/and at divergent ends 51～532 outputs 32 tunnel single wavelength lasers.
Embodiment three
As Fig. 3, based on the multi-wavelength and the multichannel single wavelength laser of AWG and fiber grating, the connection between the device of its formation:
Select the AWG 60 of a 1 * N, N=1000.
Select the doping Active Optical Fiber 20 of 15m, doping Active Optical Fiber 20 is for mixing holmium optical fiber.
Word end at AWG 60 connects doping Active Optical Fiber 20, fiber grating 10, WDM30 successively.
Divergent ends at AWG 60 connects fiber grating 11～11000 respectively.
1000 independently the laser that produces of resonant cavity at AWG 60 1 word ends 1000 wavelength lasers of 50 outputs or/and at divergent ends 51～51000 outputs 1000 tunnel single wavelength lasers.
Embodiment four
As Fig. 1, based on the multi-wavelength and the multichannel single wavelength laser of AWG and fiber grating, the connection between the device of its formation:
Select the AWG 60 of a 1 * N.
Select the doping Active Optical Fiber 20 of one section suitable length and the doping Active Optical Fiber 21～2N of suitable length, doping Active Optical Fiber 20～2N can be for er-doped, mix ytterbium, mix holmium, thorium is mixed, mixed to the ytterbium erbium altogether, mix praseodymium or neodymium-doped fiber.
Word end at AWG 60 connects doping Active Optical Fiber 20, fiber grating 10, WDM 30 successively.
Divergent ends at AWG 60 connects doping Active Optical Fiber 21～2N, fiber grating 11～1N, WDM31～3N successively.
The laser that the individual independently resonant cavity of N produces is exported N wavelength lasers or/and at the single wavelength laser in divergent ends 51～5N output N road at AWG 60 1 word ends 50.
Claims (4)
1. based on the multi-wavelength and the multichannel single wavelength laser of AWG and fiber grating, it is characterized in that this laser comprises: the AWG of a 1 * N (60), fiber grating (10-1N), doping Active Optical Fiber (20-2N), WDM (30-3N), pump light (40-4N); Connection between them:
Select the long doping Active Optical Fiber (20～2N) of 0.5～30m;
Fiber grating (10) is sampling optical-fiber grating or cascade fiber grating or band optical fiber grating, and fiber grating (11-1N) is polarization-maintaining fiber grating or ordinary optic fibre grating;
Word end at AWG (60) connects doping Active Optical Fiber (20), fiber grating (10), WDM (30) successively;
The divergent ends of AWG (60) connect successively the doping Active Optical Fiber (21～2N), fiber grating (11～1N), WDM (31～3N);
Pump light (40～4N) by WDM (30～3N) are coupled into the doping Active Optical Fiber, and (in 20～2N), (11～1N) constitute N independently resonant cavity with the fiber grating (10) of the word end of AWG (60) respectively to the fiber grating of divergent ends, produce laser; N 〉=1.
2. multi-wavelength and multichannel single wavelength laser based on AWG and fiber grating according to claim 1 is characterized in that, the doping Active Optical Fiber (20～2N) for er-doped, mix ytterbium, mix holmium, thorium is mixed, mixed to the ytterbium erbium altogether, mix praseodymium or neodymium-doped Active Optical Fiber.
3. multi-wavelength and multichannel single wavelength laser based on AWG and fiber grating according to claim 1, it is characterized in that, word end at AWG (60) connects fiber grating (10), (41～4N) (31～3N) are coupled into the doping Active Optical Fiber (in 21～2N) to pump light by WDM respectively, (11～1N) constitute N independently resonant cavity with the fiber grating (10) of AWG (60) one word ends respectively to the fiber grating of divergent ends, at N wavelength laser of AWG (60) one word ends (50) output or/and at divergent ends (51～5N) output N roads list wavelength lasers.
4. multi-wavelength and multichannel single wavelength laser based on AWG and fiber grating according to claim 1, it is characterized in that, divergent ends at AWG (60) connects fiber grating (11～1N), pump light (40) is coupled in the doping Active Optical Fiber (20) by WDM (30), (11～1N) constitute N independently resonant cavity with the fiber grating (10) of AWG (60) one word ends respectively to the fiber grating of divergent ends, at N wavelength laser of AWG (60) one word ends (50) output or/and at divergent ends (51～5N) output N roads list wavelength lasers.
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| CNU2008201084790U CN201263040Y (en) | 2008-06-06 | 2008-06-06 | Multi-wavelength and multipath single wavelength laser based on AWG and optical fiber grating |
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| CNU2008201084790U CN201263040Y (en) | 2008-06-06 | 2008-06-06 | Multi-wavelength and multipath single wavelength laser based on AWG and optical fiber grating |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570255A (en) * | 2011-12-30 | 2012-07-11 | 北京交通大学 | Multi-wavelength optical fiber laser |
| CN110137797A (en) * | 2019-05-10 | 2019-08-16 | 上海电力学院 | A method of generating ultrahigh frequency pulses |
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2008
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570255A (en) * | 2011-12-30 | 2012-07-11 | 北京交通大学 | Multi-wavelength optical fiber laser |
| CN110137797A (en) * | 2019-05-10 | 2019-08-16 | 上海电力学院 | A method of generating ultrahigh frequency pulses |
| CN110137797B (en) * | 2019-05-10 | 2020-10-09 | 上海电力学院 | Method for generating ultrahigh frequency pulse |
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Granted publication date: 20090624 Termination date: 20120606 |