CN202405608U - Multi-wavelength optical fiber laser based on fusible cone gratings of optical fiber coupler - Google Patents
Multi-wavelength optical fiber laser based on fusible cone gratings of optical fiber coupler Download PDFInfo
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- CN202405608U CN202405608U CN2012200069963U CN201220006996U CN202405608U CN 202405608 U CN202405608 U CN 202405608U CN 2012200069963 U CN2012200069963 U CN 2012200069963U CN 201220006996 U CN201220006996 U CN 201220006996U CN 202405608 U CN202405608 U CN 202405608U
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Abstract
The utility model relates to a multi-wavelength optical fiber laser based on fusible cone gratings of an optical fiber coupler, relating to an optical fiber laser, which is suitable for the field of optical fiber communication and solves the problems of low stability of a laser structure and difficult control of the quantity of wavelengths of output laser in the conventional multi-wavelength optical fiber laser. A first pumping source (51) in the laser is connected with a first port (411) of a first wavelength division multiplexer, a second port (412) of the first wavelength division multiplexer is connected with a first port (21) of a coupler; a third port (413) of the first wavelength division multiplexer is connected with one end of first active monomode optical fiber (11), and the other end of the first active monomode optical fiber (11) is connected with a third port (23) of the coupler; and the center wavelengths of a first optical fiber grating to an Nth optical fiber grating (31, 32,......, 3 M, 3 (M + 1), 3 (M + 2),......, 3 N) are not consistent, the optical fiber gratings are Bragg optical fiber gratings, and reflection bandwidths are not overlapped, wherein N is between 2 and 50, M is more than or equal to 0 and is less than or equal to N, and M and N are all positive integers.
Description
Technical field
The utility model relates to a kind of fiber laser, is applicable to fiber optic communication field.
Background technology
Human discovery also utilizes light source can trace back to the primitive tribe's age with the fire illumination; All light sources before laser produces all can't have the raising of matter in directivity and brightness; No matter add how much equipment output light is regulated, the problem that the angle of divergence is big, energy is not concentrated can't effectively solve all the time.This returns its reason to be that it is not coherent source that laser produces all light sources in the past, and the angle of divergence is big, and brightness is low to be its intrinsic disadvantage.Up to the early sixties in last century; The appearance of first ruby laser has just thoroughly solved this problem, and along with the continuous maturation of laser technique, the application of laser also further expands; At present, laser has developed into and has comprised semiconductor laser, fiber laser, CO
2The different huge laser system of multiple base reason such as laser, free electron laser.Take all factors into consideration the pluses and minuses of all kinds of lasers; Fiber laser is with its good beam quality; Compact conformation, the heat efficiency are low, light-characteristics such as light conversion efficiency height obtain the favor of vast researcher, and show its huge economic benefit and social benefit in the base application field.
At present, attracted people's extensive concern with characteristics such as its good beam quality, conversion efficiency height and compact conformations based on the fiber laser of covering pumping technology.The single fiber power output of fiber laser in 2004 reaches a kilowatt magnitude, and IPG company reports in 2009 have been realized the single-mode laser output of single fiber myriawatt.But along with the increase of power, various nonlinear effects such as SBS, SRS and FWM make beam quality seriously reduce, and become the huge obstacle of further increase laser power.The proposition of big mode field area LMA optical fiber becomes a kind of feasible method, increases fiber radius and can effectively increase the luminous power that optical fiber can carry under the constant situation of optical power density keeping, for the preparation of high power fiber laser provides necessary precondition.But because the fiber radius increasing degree is limited, excessive fiber radius makes the complicacy that the mould field becomes, beam quality can not get guaranteeing, so this method problem that can solve receives the restriction of fiber size.Another kind method is MOPA MOPA, and this method can effectively increase laser power, and exports being of high quality of laser, but receives the restriction of simple optical fiber luminous power bearing capacity equally.
Fiber laser is being brought into play irreplaceable effect in the communications field; Multi-wavelength; The fiber laser of narrow linewidth all is the target that pursue the communications field all the time, and fiber laser can be realized multi-wavelength, the output of narrow-linewidth laser at present; The efficient of conversion is high, and considerable effect has been played in the progress that promotes optical communication.But the most comb filter structures that adopt of existing multiple-wavelength laser are specially M-Z interferometer that sampled-grating, two three-dB couplers constitute, F-P etalon etc., poor stability.And be difficult to the quantity of wavelength is control effectively.
Therefore, the problem that present multi-wavelength optical fiber laser faces is: the poor stability of laser structure, output Wavelength of Laser quantity is difficult to control.
The utility model content
The utility model technical problem to be solved is: the poor stability of laser structure, output Wavelength of Laser quantity is difficult to control.
The technical scheme of the utility model is:
Based on the multi-wavelength optical fiber laser of fiber coupler pyrometric cone grating, this laser comprises the first active monomode fiber, coupler; Be scribed at coupler pyrometric cone district first to the N fiber grating; First pumping source, first wavelength division multiplexer, the connected mode of each device is:
First pumping source connects first port of first wavelength division multiplexer; Second port of first wavelength division multiplexer connects first port of coupler; The 3rd port of first wavelength division multiplexer connects an end of the first active monomode fiber, the 3rd port of another termination coupler of the first active monomode fiber;
Laser signal from second port of coupler or/and the output of the 4th port;
Be scribed at the first all inconsistent to the centre wavelength of N fiber grating of coupler pyrometric cone district, be bragg grating, reflection bandwidth does not all have lap;
First is scribed on wherein optical fiber in coupler pyrometric cone district to the M fiber grating, and M+1 to the N fiber grating is scribed on another root optical fiber in coupler pyrometric cone district;
N=2～50,0≤M≤N, M and N are nonnegative integer.
The utility model is compared the beneficial effect that is had with prior art:
Comb filter in traditional multi-wavelength optical fiber laser rely on the frequency-selecting effect of sampled-grating that light signal is selected, but the manufacture difficulty of sampled-grating is higher; And precision is difficult to meet the demands; Can't reach the requirement the same with Theoretical Calculation to the selection of light signal, in the described multiple-wavelength laser structure of the utility model, each grating pair is answered the laser signal of a wavelength; Manufacture difficulty is low, and precision is high; The tradition multiple-wavelength laser is difficult to number of wavelengths is controlled; Wavelength is crossed the laser signal power that can make each output wavelength at most and is descended; And output wavelength is crossed and can't be met the demands at least; The utility model is owing to adopt a plurality of gratings to be series at the method in coupler pyrometric cone district, and the quantity of grating is the quantity of output wavelength, and controllability is strong.
Description of drawings
Fig. 1 is the multi-wavelength optical fiber laser based on fiber coupler pyrometric cone grating of N wavelength of output.
Fig. 2 is the multi-wavelength optical fiber laser based on fiber coupler pyrometric cone grating of 50 wavelength of output.
Fig. 3 is the multi-wavelength optical fiber laser based on fiber coupler pyrometric cone grating of U wavelength of output.
Fig. 4 is the multi-wavelength optical fiber laser based on fiber coupler pyrometric cone grating of two wavelength of output.
Fig. 5 is the multi-wavelength optical fiber laser based on fiber coupler pyrometric cone grating of five wavelength of output.
Fig. 6 is the multi-wavelength optical fiber laser based on fiber coupler pyrometric cone grating of 3 * 3 couplers.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
Execution mode one
Multi-wavelength optical fiber laser based on fiber coupler pyrometric cone grating; Like Fig. 1, this laser comprises the first active monomode fiber 11, coupler; Be scribed at coupler pyrometric cone district 2 first to N fiber grating 31,32 ..., 3M, 3 (M+1), 3 (M+2) ..., 3N; First pumping source, 51, the first wavelength division multiplexers, the connected mode of each device is:
Laser signal from second port 22 of coupler or/and 24 outputs of the 4th port.
Be scribed at coupler pyrometric cone district 2 first to N fiber grating 31,32 ..., 3M, 3 (M+1), 3 (M+2) ..., 3N centre wavelength all inconsistent, be bragg grating, reflection bandwidth does not all have lap.
First to M fiber grating 31,32 ..., 3M is scribed on wherein optical fiber in coupler pyrometric cone district 2, M+1 to the N fiber grating 3 (M+1), 3 (M+2) ..., 3N is scribed on another root optical fiber in coupler pyrometric cone district 2.
N=2～50,0≤M≤N, M and N are nonnegative integer.
Execution mode two
Multi-wavelength optical fiber laser based on fiber coupler pyrometric cone grating; Like Fig. 2, this laser comprises the first active monomode fiber 11, coupler; Be scribed at coupler pyrometric cone district 2 the first to the 50 fiber grating 31,32 ..., 350; First pumping source, 51, the first wavelength division multiplexers, the connected mode of each device is:
Laser signal from second port 22 of coupler or/and 24 outputs of the 4th port.
Be scribed at coupler pyrometric cone district 2 the first to the 50 fiber grating 31,32 ..., 350 centre wavelength is all inconsistent, is bragg grating, reflection bandwidth does not all have lap.
The first to the 50 fiber grating 31,32 ..., 350 be scribed on wherein optical fiber in coupler pyrometric cone district 2.
Execution mode three
Multi-wavelength optical fiber laser based on fiber coupler pyrometric cone grating; Like Fig. 3, this laser comprises first, second active monomode fiber 11,12,3 * 3 couplers; Be scribed at 3 * 3 coupler pyrometric cone districts 2 first to U fiber grating 31,32 ..., 3M, 3 (M+1), 3 (M+2) ..., 3N, 3 (N+1), 3 (N+2) ..., 3U; First, second pumping source 51,52, first, second wavelength division multiplexer, the connected mode of each device is:
Be scribed at 3 * 3 coupler pyrometric cone districts 2 first to U fiber grating 31,32 ..., 3M, 3 (M+1), 3 (M+2) ..., 3N, 3 (N+1), 3 (N+2) ..., 3U centre wavelength all inconsistent; Be bragg grating, reflection bandwidth does not all have lap.
Laser signal from the five-port 25 of 3 * 3 couplers or/and 26 outputs of the 6th port.
First to M fiber grating 31,32 ..., 3M, M+1 to the N fiber grating 3 (M+1), 3 (M+2) ..., 3N and N+1 to the U fiber grating 3 (N+1), 3 (N+2) ..., 3U is scribed at respectively on three different fibers in 3 * 3 coupler pyrometric cone districts 2.
U=2～50,0≤M≤N≤U, the equal nonnegative integer of M, N and U.
Execution mode four
Based on the multi-wavelength optical fiber laser of fiber coupler pyrometric cone grating, like Fig. 4, this laser comprises the first active monomode fiber 11; Coupler is scribed at first, second fiber grating 31,32, the first pumping sources 51 in coupler pyrometric cone district 2; First wavelength division multiplexer, the connected mode of each device is:
Laser signal from second port 22 of coupler or/and 24 outputs of the 4th port.
The centre wavelength of first, second fiber grating 31,32 that is scribed at coupler pyrometric cone district 2 is inconsistent, is bragg grating, and reflection bandwidth does not all have lap.
First, second fiber grating 31,32 is scribed on wherein optical fiber in coupler pyrometric cone district 2.
Execution mode five
Multi-wavelength optical fiber laser based on fiber coupler pyrometric cone grating; Like Fig. 5, this laser comprises the first active monomode fiber 11, coupler; Be scribed at first to the 5th fiber grating 31,32,33,34,35 in coupler pyrometric cone district 2; First pumping source, 51, the first wavelength division multiplexers, the connected mode of each device is:
Laser signal from second port 22 of coupler or/and 24 outputs of the 4th port.
The centre wavelength of first to the 5th fiber grating 31,32,33,34,35 that is scribed at coupler pyrometric cone district 2 is all inconsistent, is bragg grating, and reflection bandwidth does not all have lap.
First, second fiber grating 31,32 is scribed on wherein optical fiber in coupler pyrometric cone district 2, and the 3rd to the 5th fiber grating 33,34,35 is scribed on another root optical fiber in coupler pyrometric cone district 2.
Execution mode six
Multi-wavelength optical fiber laser based on fiber coupler pyrometric cone grating; Like Fig. 6, this laser comprises first, second active monomode fiber 11,12,3 * 3 couplers; Be scribed at 3 * 3 coupler pyrometric cone districts 2 the first to the 50 fiber grating 31,32 ..., 35,36,37 ..., 312,313,314 ..., 350; First, second pumping source 51,52, first, second wavelength division multiplexer, the connected mode of each device is:
Be scribed at 3 * 3 coupler pyrometric cone districts 2 the first to the 50 fiber grating 31,32 ..., 35,36,37 ..., 312,313,314 ..., 350 centre wavelength is all inconsistent; Be bragg grating, reflection bandwidth does not all have lap.
Laser signal from the five-port 25 of 3 * 3 couplers or/and 26 outputs of the 6th port.
First to the 5th fiber grating 31,32 ..., 35, the six to the 12 fiber gratings 36,37 ..., the 312 and the 13 to the 50 fiber grating 313,314 ..., on 350 three different fibers being scribed at respectively in 3 * 3 coupler pyrometric cone districts 2.
Claims (1)
1. based on the multi-wavelength optical fiber laser of fiber coupler pyrometric cone grating; It is characterized in that: this laser comprises the first active monomode fiber (11); Coupler, be scribed at coupler pyrometric cone district (2) first to the N fiber grating (31,32 ..., 3M, 3 (M+1), 3 (M+2) ..., 3N), first pumping source (51); First wavelength division multiplexer, the connected mode of each device is:
First pumping source (51) connects first port (411) of first wavelength division multiplexer; Second port (412) of first wavelength division multiplexer connects first port (21) of coupler; The 3rd port (413) of first wavelength division multiplexer connects an end of the first active monomode fiber (11), the 3rd port (23) of another termination coupler of the first active monomode fiber (11);
Laser signal from second port (22) of coupler or/and the 4th port (24) output;
Be scribed at coupler pyrometric cone district (2) first to the N fiber grating (31,32 ..., 3M, 3 (M+1), 3 (M+2) ..., 3N) centre wavelength all inconsistent, be bragg grating, reflection bandwidth does not all have lap;
First to the M fiber grating (31,32 ..., 3M) be scribed on wherein optical fiber in coupler pyrometric cone district (2), M+1 to the N fiber grating (3 (M+1), 3 (M+2) ..., 3N) be scribed on another root optical fiber in coupler pyrometric cone district (2);
N=2～50,0≤M≤N, M and N are nonnegative integer.
2. the multi-wavelength optical fiber laser based on fiber coupler pyrometric cone grating according to claim 1 is characterized in that:
Described coupler is 3 * 3 couplers;
First port (21) of 3 * 3 couplers connects second port (412) of first wavelength division multiplexer; First port (411) of first wavelength division multiplexer connects first pumping source (51); The 3rd port (413) of first wavelength division multiplexer connects an end of the first active monomode fiber (11), the 3rd port (23) of another termination 3 * 3 couplers of the first active monomode fiber (11);
Second port (22) of 3 * 3 couplers connects second port (422) of second wavelength division multiplexer; First port (421) of second wavelength division multiplexer connects second pumping source (52); The 3rd port (423) of second wavelength division multiplexer connects an end of the second active monomode fiber (12), the 4th port (24) of another termination 3 * 3 couplers of the second active monomode fiber (12);
Be scribed at 3 * 3 coupler pyrometric cone districts (2) first to the U fiber grating (31,32 ..., 3M, 3 (M+1), 3 (M+2) ..., 3N, 3 (N+1), 3 (N+2) ..., 3U) centre wavelength all inconsistent; Be bragg grating, reflection bandwidth does not all have lap;
Laser signal from the five-port (25) of 3 * 3 couplers or/and the 6th port (26) output;
First to the M fiber grating (31,32 ..., 3M), M+1 to the N fiber grating (3 (M+1), 3 (M+2) ..., 3N) and N+1 to the U fiber grating (3 (N+1), 3 (N+2) ..., 3U) be scribed at respectively on three different fibers in 3 * 3 coupler pyrometric cone districts (2);
U=2～50,0≤M≤N≤U, M, N and U are nonnegative integer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012200069963U CN202405608U (en) | 2012-01-09 | 2012-01-09 | Multi-wavelength optical fiber laser based on fusible cone gratings of optical fiber coupler |
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| CN2012200069963U CN202405608U (en) | 2012-01-09 | 2012-01-09 | Multi-wavelength optical fiber laser based on fusible cone gratings of optical fiber coupler |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113608295A (en) * | 2021-08-04 | 2021-11-05 | 西南交通大学 | Fiber-integrated adjustable optical comb filter, method and optical system |
| WO2022068711A1 (en) * | 2020-09-30 | 2022-04-07 | 华为技术有限公司 | Optical amplification device and multi-port wavelength division multiplexing coupler |
-
2012
- 2012-01-09 CN CN2012200069963U patent/CN202405608U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022068711A1 (en) * | 2020-09-30 | 2022-04-07 | 华为技术有限公司 | Optical amplification device and multi-port wavelength division multiplexing coupler |
| CN113608295A (en) * | 2021-08-04 | 2021-11-05 | 西南交通大学 | Fiber-integrated adjustable optical comb filter, method and optical system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120829 Termination date: 20130109 |
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| CF01 | Termination of patent right due to non-payment of annual fee |