CN108183385A - One kind is based on π phase-shifted fiber grating tunable narrow-linewidth lasers - Google Patents
One kind is based on π phase-shifted fiber grating tunable narrow-linewidth lasers Download PDFInfo
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- CN108183385A CN108183385A CN201711302875.7A CN201711302875A CN108183385A CN 108183385 A CN108183385 A CN 108183385A CN 201711302875 A CN201711302875 A CN 201711302875A CN 108183385 A CN108183385 A CN 108183385A
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- shifted fiber
- high reflection
- fiber gratings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/0675—Resonators including a grating structure, e.g. distributed Bragg reflectors [DBR] or distributed feedback [DFB] fibre lasers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/10053—Phase control
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Abstract
The invention discloses one kind to be based on π phase-shifted fiber grating tunable narrow-linewidth lasers.It is formed including pump laser, wavelength division multiplexer, erbium-doped fiber, isolator, circulator, π phase-shifted fiber gratings, high reflection FBG, piezoelectric ceramics 1, piezoelectric ceramics 2, coupler.The system is influenced, to the movement of long wave direction and π phase-shifted fiber gratings transmission window as narrow band filter feature, to realize the output of tunable narrow-linewidth laser by extraneous stress by the use of the spectrum of π phase-shifted fiber gratings and high reflection FBG.The advantages of invention：Realize tunable narrow-linewidth wavelength output, and method simple possible, it is easy to operate the features such as.
Description
Technical field
The present invention relates to a kind of tunable narrow-linewidth lasers, specially a kind of tunable narrow based on π phase-shifted fiber gratings
Line width laser.
Background technology
The single longitudinal mode laser beam of narrow linewidth is a kind of high-quality laser with extremely low phase noise and overlength coherence length,
It has broad application prospects in the fields such as Fibre Optical Sensor, fiber optic communication, laser radar, distributed petroleum pipeline detection.π phase shifts
Fiber grating refer to the variations in refractive index of fibre core in certain positions there are the SPA sudden phase anomalies that size is π, so as to change point of spectrum
Cloth forms extremely narrow transmission window, and the transmission window of phase-shifted grating can be moved with the change of extraneous stress.It is based on
This, the present invention is proposed realizes tunable narrow-linewidth laser using high reflection FBG and π phase-shifted fiber grating.
Invention content
The present invention relates to a kind of tunable narrow-linewidth laser, using the spectrum of π phase-shifted fiber gratings and high reflection FBG by
To the movement of long wave direction and π phase-shifted fiber gratings transmission window as narrow band filter feature, realization can for the influence of extraneous stress
Tune the output of narrow-linewidth laser.
The technical solution adopted by the present invention is as follows：A kind of tunable narrow-linewidth laser, it is characterised in that detailed process is:
(1) light of pump laser output enters wavelength division multiplexer, subsequently into erbium-doped fiber, is come out from erbium-doped fiber
Light enters isolator, subsequently into 1 port of circulator, then enters 3 port of circulator by the reflected light of high reflection FBG,
The light come out from 3 port of circulator enters π phase-shifted fiber gratings；
(2) by the use of the transmission window of π phase-shifted fiber gratings as narrow band filter, when the FBG reflection bandwidths of high reflection are small
In π phase-shifted fiber gratings transmission bandwidth and cover π phase-shifted fiber gratings transmission window when (refer to attached drawing 2 and attached drawing 3), it is defeated
The centre wavelength for going out laser is just the centre wavelength of π phase-shifted fiber grating transmission windows；
(3) while piezoelectric ceramics 1 and piezoelectric ceramics 2 are adjusted, it is identical micro- to π phase-shifted fiber gratings and high reflection FBG generations
Strain makes π phase-shifted fiber gratings and high reflection FBG transmission windows that corresponding movement occur；Assuming that π phase-shifted fiber gratings strain
Coefficient is a1, the high reflection FBG coefficients of strain are a2, then to ensure a1p1=a2p2Moment is equal, wherein p1To be added in π phase shift optical fibers
The voltage of piezoelectric ceramics, p are corresponded on grating2The voltage of piezoelectric ceramics is corresponded on high reflection FBG to be added in, it is possible to which output is different
The light of wavelength；
(4) light transmitted from π phase-shifted fiber gratings enters coupler, the light exported from coupler Single port, again
Into wavelength division multiplexer, a cycle is completed；
(5) it repeats the above process, when gain is more than loss, the laser of acquisition swashs from coupler another mouth output
Light, so as to fulfill the output of tunable narrow-linewidth laser.
One kind including pump laser, wavelength division multiplexer, is mixed based on π phase-shifted fiber grating tunable narrow-linewidth lasers
Bait optical fiber, isolator, circulator, π phase-shifted fiber gratings, high reflection FBG, piezoelectric ceramics 1, piezoelectric ceramics 2, coupler；It is high anti-
The reflectance spectrum for penetrating FBG is corresponding with the phase shift peak of π phase-shifted fiber gratings, and the FBG reflection bandwidths of high reflection are less than π phase shift light
The transmission bandwidth of fine grating and the transmission window (referring to attached drawing 2 and attached drawing 3) for covering π phase-shifted fiber gratings；Ensure π phase shift light
Fine grating and high reflection FBG spectral lines are equal with extraneous microstrain movement speed.Design π phase-shifted fiber gratings and high reflection
The coefficient of strain of FBG is added in voltage on π phase-shifted fiber gratings and high reflection FBG on piezoelectric ceramics when adjusting respectively, ensures it
It is equal to long wave direction movement speed.
It is an advantage of the invention that：Realize the output of tunable narrow-linewidth laser, and the spies such as method simple possible, easy to operate
Point.
Description of the drawings
Fig. 1 is present system structure drawing of device.
Fig. 2 is the transmission spectrum of π phase-shifted fiber gratings of the present invention.
Fig. 3 is the reflection spectrogram of high reflection FBG of the present invention.
Shown in Fig. 1：1 pump laser, 2 wavelength division multiplexers, 3 Er-doped fibers, 4 isolators, 5 circulators, 6 high reflection FBG,
7 piezoelectric ceramics, 1,8 π phase-shifted fiber gratings, 9 piezoelectric ceramics, 2,10 coupler.
Specific embodiment
The present invention is such to work and implementation, and embodiment is as shown in Figure 1:The detailed process of the above method is:Pump
The light of Pu laser (1) output enters wavelength division multiplexer (2), subsequently into erbium-doped fiber (3), is come out from erbium-doped fiber (3)
Light enters isolator (4), and subsequently into (5) 1 port of circulator, the light returned by high reflection FBG reflections (6) enters circulator
(5) 3 ports, the light come out from (5) 3 port of circulator enter π phase-shifted fiber gratings (8).Utilize π phase-shifted fiber gratings (8)
Transmission window is as narrow band filter.When FBG (6) reflection bandwidth of high reflection is less than the transmission bandwidth of π phase-shifted fiber gratings (8)
And during the transmission window of covering π phase-shifted fiber gratings (8), the centre wavelength for exporting laser is just transmitted for π phase-shifted fiber gratings (8)
The centre wavelength of window, while piezoelectric ceramics 1 (7) and piezoelectric ceramics 2 (9) are adjusted, to π phase-shifted fiber gratings (8) and high reflection
FBG (6) generates identical microstrain, makes π phase-shifted fiber gratings (8) and high reflection FBG (6) transmission window that corresponding shifting occur
It is dynamic, it is assumed that π phase-shifted fiber gratings (8) coefficient of strain is a1, high reflection FBG (6) coefficient of strain is a2, then to ensure a1p1=a2p2
Moment is equal, wherein p1The voltage of piezoelectric ceramics 2 (9), p are corresponded on π phase-shifted fiber gratings (8) to be added in2To be added in high reflection
The voltage of piezoelectric ceramics 1 (7) is corresponded on FBG (6) can export the light of different wave length, be transmitted from π phase-shifted fiber gratings (8)
The light come enters coupler (10), and then the light exported from coupler (10) Single port is again introduced into wavelength division multiplexer (2), complete
It into a cycle, repeats the above process, when gain is more than loss, the laser of acquisition is defeated from another mouthful of coupler (10)
Go out laser, so as to fulfill the output of tunable narrow-linewidth laser.
One kind is based on π phase-shifted fiber grating tunable narrow-linewidth lasers.Including pump laser, wavelength division multiplexer, mix
Bait optical fiber, isolator, circulator, π phase-shifted fiber gratings, high reflection FBG, piezoelectric ceramics 1, piezoelectric ceramics 2, coupler.
Claims (1)
1. a kind of tunable narrow-linewidth laser, it is characterised in that detailed process is:
(1) light of pump laser output enters wavelength division multiplexer, subsequently into erbium-doped fiber, from the light that erbium-doped fiber comes out into
Enter isolator, subsequently into 1 port of circulator, 3 port of circulator is then entered by the reflected light of high reflection FBG, from ring
The light that 3 port of shape device comes out enters π phase-shifted fiber gratings；
(2) by the use of the transmission window of π phase-shifted fiber gratings as narrow band filter, when the FBG reflection bandwidths of high reflection are less than π phases
When the transmission bandwidth and the transmission window of covering π phase-shifted fiber gratings of shifting fiber grating, the centre wavelength for exporting laser is just π phases
The centre wavelength of shifting fiber grating transmission window；
(3) while piezoelectric ceramics 1 and piezoelectric ceramics 2 are adjusted, identical microstrain are generated to π phase-shifted fiber gratings and high reflection FBG,
Make π phase-shifted fiber gratings and high reflection FBG transmission windows that corresponding movement occur；Assuming that the π phase-shifted fiber grating coefficients of strain
For a1, the high reflection FBG coefficients of strain are a2, then to ensure a1p1=a2p2Moment is equal, wherein p1To be added in π phase-shifted fiber gratings
The voltage of upper corresponding piezoelectric ceramics, p2The voltage of piezoelectric ceramics is corresponded on high reflection FBG to be added in, it is possible to export different wave length
Light；
(4) light transmitted from π phase-shifted fiber gratings enters coupler, and the light exported from coupler Single port is again introduced into
Wavelength division multiplexer completes a cycle；
(5) it repeating the above process, when gain is more than loss, from coupler, another mouth exports laser to the laser of acquisition,
So as to fulfill the output of tunable narrow-linewidth laser.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711302875.7A CN108183385A (en) | 2017-12-08 | 2017-12-08 | One kind is based on π phase-shifted fiber grating tunable narrow-linewidth lasers |
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| CN201711302875.7A CN108183385A (en) | 2017-12-08 | 2017-12-08 | One kind is based on π phase-shifted fiber grating tunable narrow-linewidth lasers |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110838671A (en) * | 2019-12-12 | 2020-02-25 | 上海瀚宇光纤通信技术有限公司 | Single-frequency optical fiber laser |
| CN111129923A (en) * | 2019-12-20 | 2020-05-08 | 江苏师范大学 | Single-frequency and single-polarization optical fiber distributed feedback laser |
| CN111342329A (en) * | 2020-03-04 | 2020-06-26 | 厦门大学 | Continuous millimeter wave signal generating device and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101212115A (en) * | 2006-12-28 | 2008-07-02 | 中国科学院半导体研究所 | Tunable erbium-doped optical fiber annular chamber laser |
| CN101728752A (en) * | 2008-10-22 | 2010-06-09 | 中国科学院半导体研究所 | Wavelength tunable fiber laser |
| CN104733987A (en) * | 2013-12-19 | 2015-06-24 | 李国玉 | Linear automatic tunable annular cavity fiber laser |
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2017
- 2017-12-08 CN CN201711302875.7A patent/CN108183385A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101212115A (en) * | 2006-12-28 | 2008-07-02 | 中国科学院半导体研究所 | Tunable erbium-doped optical fiber annular chamber laser |
| CN101728752A (en) * | 2008-10-22 | 2010-06-09 | 中国科学院半导体研究所 | Wavelength tunable fiber laser |
| CN104733987A (en) * | 2013-12-19 | 2015-06-24 | 李国玉 | Linear automatic tunable annular cavity fiber laser |
Non-Patent Citations (2)
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| 孙俊杰 等: ""基于π相移光纤布拉格光栅的窄线宽掺铒光纤激光器"", 《激光与光电子学进展》 * |
| 李国玉 等: ""基于压电陶瓷闭环控制的线性可调谐环形腔光纤激光器"", 《光学学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110838671A (en) * | 2019-12-12 | 2020-02-25 | 上海瀚宇光纤通信技术有限公司 | Single-frequency optical fiber laser |
| CN111129923A (en) * | 2019-12-20 | 2020-05-08 | 江苏师范大学 | Single-frequency and single-polarization optical fiber distributed feedback laser |
| CN111129923B (en) * | 2019-12-20 | 2022-02-25 | 江苏师范大学 | Single-frequency and single-polarization optical fiber distributed feedback laser |
| CN111342329A (en) * | 2020-03-04 | 2020-06-26 | 厦门大学 | Continuous millimeter wave signal generating device and method |
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Application publication date: 20180619 |