CN108565667A - A kind of feedback-enhanced erbium-doped nonlinear fiber grating accidental laser - Google Patents
A kind of feedback-enhanced erbium-doped nonlinear fiber grating accidental laser Download PDFInfo
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- CN108565667A CN108565667A CN201810257611.2A CN201810257611A CN108565667A CN 108565667 A CN108565667 A CN 108565667A CN 201810257611 A CN201810257611 A CN 201810257611A CN 108565667 A CN108565667 A CN 108565667A
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- fiber grating
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- erbium
- reflection
- high reflection
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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
-
- 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
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06716—Fibre compositions or doping with active elements
-
- 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
- H01S3/30—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects
- H01S3/302—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects in an optical fibre
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
The invention discloses a kind of feedback-enhanced erbium-doped nonlinear fiber grating accidental laser, including pump laser, wavelength division multiplexer, high reflection fiber grating, weak reflection erbium-doped nonlinear fiber grating strings.Optical fiber laser of the present invention has many advantages, such as that Low threshold, high conversion efficiency belong to field of laser device technology.The present invention provides weak distributed feed-back using weak reflection fiber grating string is inscribed on Er-doped fiber.The present invention increases intracavitary using two high reflection fiber gratings and feeds back, and improves laser-conversion efficiency and output power.Optical fiber laser of the present invention has huge application potential in fields such as optic communications.
Description
Technical field
The invention belongs to field of laser device technology, and in particular to a kind of feedback-enhanced erbium-doped nonlinear fiber grating Random Laser
Device.
Background technology
Random fiber laser is that a kind of scattering light based in Disordered Media is constantly amplified by gain in transmission process
Novel no cavity configuration laser, it has, and stability is good, compact structure is simple（Without hysteroscope）And spatial independence is excellent
Point, these features make it have vast potential for future development in many application aspects, such as long-distance optical fiber communication, photonic crystal light
Source, biomedical imaging, remote sensing etc..
2010, experiment confirmed the faint backward Rayleigh scattering light in full utilization optical fiber as the random of feedback mechanism
Distributed feedback optical fiber laser can obtain accumulation and quilt although backscattering coefficient very little in extra long distance optical fiber
Lasting amplification will form Random Laser output when gain is more than loss.Therefore the new side of optical fiber laser research is opened
To having driven lasting exploitation and application study.Its special optics mechanism makes it have great advantage in many fields, shows
Show very strong competitiveness, becomes the mainstream of current research and development.But very weak etc. originals of the Rayleigh scattering caused by optical fiber
Cause results in the deficiencies of this kind of optical fiber laser is with high threshold, low output power and low power conversion efficiency.
Fiber grating is to form the periodically variable optical fiber device of permanent refractive index in fiber core by certain method
Part.Due to having the characteristics that selective reflecting, can be used in optical fiber laser.Such laser have it is at low cost, be convenient for and
The advantages that fiber coupling, stability are high, wavelength easily tunes.With deepening continuously for scientific research, there is scientific research personnel to propose optical fiber light
Grid are inscribed in special optical fiber and are used in optical fiber laser, and the chamber that not only can shorten optical fiber laser is long, with more drop
The advantages that Low threshold.
The present invention on the basis of above-mentioned, inscribed on Er-doped fiber weak reflection fiber grating string and with two high reflection light
Fine grating is combined, and proposes the stable random fiber laser of a kind of structure novel, high conversion efficiency, output.
Invention content
In view of the deficiencies of the prior art, the present invention proposes a kind of feedback-enhanced erbium-doped nonlinear fiber grating accidental laser,
Weak distributed feed-back is provided by inscribing weak reflection fiber grating string on Er-doped fiber, is increased using two high reflection fiber gratings
Intracavitary is fed back, and laser-conversion efficiency and output power are improved.
The technical solution adopted for solving the technical problem of the present invention is as follows：
A kind of feedback-enhanced erbium-doped nonlinear fiber grating accidental laser, it is characterised in that by pump laser 1, wavelength division multiplexer 2,
First high reflection fiber grating 3, weak reflection erbium-doped nonlinear fiber grating string 4, the second high reflection fiber grating 5 composition；Pump laser 1
It is connected with the input terminal of wavelength division multiplexer 2, output one end of wavelength division multiplexer 2 connects the first high reflection fiber grating 3, and wavelength-division is multiple
It is sequentially connected weak reflection erbium-doped nonlinear fiber grating string 4 and the second high reflection fiber grating 5 with the output other end of device 2, second is high anti-
Penetrate the other end output laser of fiber grating 5；Wherein, the holding of the first high reflection fiber grating 3 and 1 homonymy of pump laser, or
It keeps homonymy with weak reflection erbium-doped nonlinear fiber grating string 4, the second high reflection fiber grating 5.
A kind of feedback-enhanced erbium-doped nonlinear fiber grating accidental laser according to claim 1, which is characterized in that institute
State each fiber grating spacing random distribution in 1-100mm in weak reflection erbium-doped nonlinear fiber grating string 4；The first high reflection light
Fine grating 3, the second high reflection fiber grating 5 are consistent with the centre wavelength of weak reflection erbium-doped nonlinear fiber grating string 4 and bandwidth.
The operation principle of the present invention is that：
Pump laser 1 is opened, pump light is coupled into linear cavity by wavelength division multiplexer 2, in weak reflection erbium-doped nonlinear fiber grating
In string 4, after Er3+ absorbs pump energy, from ground state transition to high level state, and metastable state energy is transitted in a manner of radiationless
Grade, Er3+ constantly absorbs pump energy to be assembled in upper energy level, and final population inversion between realizing energy level is excited spoke to generate
It penetrates, gain of light amplification is carried out to the light of C-band.Simultaneously as the Anderson localization in weak reflection erbium-doped nonlinear fiber grating string 4 is existing
As so that multiple weak reflection occurs in weak reflection erbium-doped nonlinear fiber grating string 4 for light, generates the closed annular similar to resonant cavity
Chamber, light are constantly amplified by gain in weak reflection string.Wherein, backward and forward direction light goes out from weak reflection erbium-doped nonlinear fiber grating string 4
The first high reflection fiber grating 3 and the second high reflection fiber grating 5 are respectively enterd after penetrating, and are reflected into weak reflection respectively and are mixed
Gain is amplified again in erbium fiber grating string 4.Therefore, when the gain of intracavitary is more than loss, laser is generated.
The present invention has the advantages that following innovation：
Fiber grating string that the present invention uses is inscribed on Er-doped fiber and providing weak distributed feed-back, is dissipated using Rayleigh with traditional
It penetrates offer distributed feed-back to compare, the use length of optical fiber is greatly reduced, reduces the threshold value of laser.The present invention uses two
High reflection fiber grating can increase intracavitary feedback, greatly improve the transfer efficiency and output power of laser.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of feedback-enhanced erbium-doped nonlinear fiber grating accidental laser.
Specific implementation mode
Present invention is further described in detail with reference to the accompanying drawings and detailed description, but not limited to this.
A kind of feedback-enhanced erbium-doped nonlinear fiber grating accidental laser, structural schematic diagram including pumping as shown in Figure 1, swash
Light device 1, wavelength division multiplexer 2, the first high reflection fiber grating 3, weak reflection erbium-doped nonlinear fiber grating string 4, the second high reflection optical fiber light
Grid 5；Pump laser 1 is connected with the input terminal of wavelength division multiplexer 2, and output one end of wavelength division multiplexer 2 connects the first high reflection
The output other end of fiber grating 3, wavelength division multiplexer 2 is sequentially connected weak reflection erbium-doped nonlinear fiber grating string 4 and the second high reflection light
The other end of fine grating 5, the second high reflection fiber grating 5 exports laser；Wherein, the first high reflection fiber grating 3 keeps and pumps
1 homonymy of Pu laser or itself and weak reflection erbium-doped nonlinear fiber grating string 4, the second high reflection fiber grating 5 keep homonymy.In laser
Output end is separately connected spectrometer and light power meter, to detect the output characteristics of laser spectrum and power.
Weak reflection erbium-doped nonlinear fiber grating string 4 of the present invention is weak anti-by continuously inscribing Er-doped fiber under laser
Penetrate fiber grating completion, each weak reflection fiber grating spacing random distribution and centre wavelength is consistent in 1-100mm；Described first
High reflection fiber grating 3 and the second high reflection fiber grating 5 are that completion and middle cardiac wave are inscribed on single mode optical fiber using laser
It is long consistent.
Claims (2)
1. a kind of feedback-enhanced erbium-doped nonlinear fiber grating accidental laser, it is characterised in that by pump laser 1, wavelength division multiplexer
2, the first high reflection fiber grating 3, weak reflection erbium-doped nonlinear fiber grating string 4, the second high reflection fiber grating 5 composition；Pumping laser
Device 1 is connected with the input terminal of wavelength division multiplexer 2, and output one end of wavelength division multiplexer 2 connects the first high reflection fiber grating 3, wave
The output other end of division multiplexer 2 is sequentially connected weak reflection erbium-doped nonlinear fiber grating string 4 and the second high reflection fiber grating 5, and second
The other end of high reflection fiber grating 5 exports laser；Wherein, the first high reflection fiber grating 3 keeps same with pump laser 1
Side or itself and weak reflection erbium-doped nonlinear fiber grating string 4, the second high reflection fiber grating 5 keep homonymy.
2. a kind of feedback-enhanced erbium-doped nonlinear fiber grating accidental laser according to claim 1, which is characterized in that described
Each fiber grating spacing random distribution in 1-100mm in weak reflection erbium-doped nonlinear fiber grating string 4；The first high reflection optical fiber
Grating 3, the second high reflection fiber grating 5 are consistent with the centre wavelength of weak reflection erbium-doped nonlinear fiber grating string 4 and bandwidth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810257611.2A CN108565667A (en) | 2018-03-27 | 2018-03-27 | A kind of feedback-enhanced erbium-doped nonlinear fiber grating accidental laser |
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|---|---|---|---|
| CN201810257611.2A CN108565667A (en) | 2018-03-27 | 2018-03-27 | A kind of feedback-enhanced erbium-doped nonlinear fiber grating accidental laser |
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| CN201810257611.2A Pending CN108565667A (en) | 2018-03-27 | 2018-03-27 | A kind of feedback-enhanced erbium-doped nonlinear fiber grating accidental laser |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111244735A (en) * | 2020-01-16 | 2020-06-05 | 广东工业大学 | Annular narrow-band fiber grating random laser and method for generating random laser |
| CN113346340A (en) * | 2021-05-12 | 2021-09-03 | 华中科技大学 | Single-frequency random DBR fiber laser based on fiber random grating |
| US20220149583A1 (en) * | 2020-11-09 | 2022-05-12 | Sichuan Guangsheng Iot Technology Co., Ltd. | Narrow-band, Low-noise Raman Fiber Laser with A Random Fiber Laser Pump |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872560A (en) * | 2014-03-14 | 2014-06-18 | 中国计量学院 | Single-pumping semi-open cavity randomly-distributed feedback laser based on erbium-doped fiber |
| CN104577678A (en) * | 2015-01-27 | 2015-04-29 | 中国计量学院 | Random fiber laser based on random phase shifting fiber bragg gratings |
| US20150270680A1 (en) * | 2014-03-20 | 2015-09-24 | Tianjin Optera Laser Technology Co., Ltd. | In-band pumping 975-nanomater single-frequency fiber laser with ytterbium-doped silica optical fiber |
| CN205282868U (en) * | 2015-10-27 | 2016-06-01 | 中国计量学院 | Random distribution feedback er -doped fiber laser based on weak reflection fiber grating cluster |
-
2018
- 2018-03-27 CN CN201810257611.2A patent/CN108565667A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872560A (en) * | 2014-03-14 | 2014-06-18 | 中国计量学院 | Single-pumping semi-open cavity randomly-distributed feedback laser based on erbium-doped fiber |
| US20150270680A1 (en) * | 2014-03-20 | 2015-09-24 | Tianjin Optera Laser Technology Co., Ltd. | In-band pumping 975-nanomater single-frequency fiber laser with ytterbium-doped silica optical fiber |
| CN104577678A (en) * | 2015-01-27 | 2015-04-29 | 中国计量学院 | Random fiber laser based on random phase shifting fiber bragg gratings |
| CN205282868U (en) * | 2015-10-27 | 2016-06-01 | 中国计量学院 | Random distribution feedback er -doped fiber laser based on weak reflection fiber grating cluster |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111244735A (en) * | 2020-01-16 | 2020-06-05 | 广东工业大学 | Annular narrow-band fiber grating random laser and method for generating random laser |
| US20220149583A1 (en) * | 2020-11-09 | 2022-05-12 | Sichuan Guangsheng Iot Technology Co., Ltd. | Narrow-band, Low-noise Raman Fiber Laser with A Random Fiber Laser Pump |
| CN113346340A (en) * | 2021-05-12 | 2021-09-03 | 华中科技大学 | Single-frequency random DBR fiber laser based on fiber random grating |
| CN113346340B (en) * | 2021-05-12 | 2022-05-20 | 华中科技大学 | Single-frequency random DBR fiber laser based on fiber random grating |
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