CN111162437A - Random laser - Google Patents
Random laser Download PDFInfo
- Publication number
- CN111162437A CN111162437A CN202010094967.6A CN202010094967A CN111162437A CN 111162437 A CN111162437 A CN 111162437A CN 202010094967 A CN202010094967 A CN 202010094967A CN 111162437 A CN111162437 A CN 111162437A
- Authority
- CN
- China
- Prior art keywords
- layer
- random
- laser
- refractive index
- optical fibers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010410 layer Substances 0.000 claims abstract description 30
- 238000005253 cladding Methods 0.000 claims abstract description 27
- 239000012792 core layer Substances 0.000 claims abstract description 20
- 239000013307 optical fiber Substances 0.000 claims abstract description 18
- 239000000835 fiber Substances 0.000 claims abstract description 16
- VYXSBFYARXAAKO-WTKGSRSZSA-N chembl402140 Chemical compound Cl.C1=2C=C(C)C(NCC)=CC=2OC2=C\C(=N/CC)C(C)=CC2=C1C1=CC=CC=C1C(=O)OCC VYXSBFYARXAAKO-WTKGSRSZSA-N 0.000 claims abstract description 8
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims abstract description 7
- 239000004926 polymethyl methacrylate Substances 0.000 claims abstract description 7
- 239000002033 PVDF binder Substances 0.000 claims abstract description 6
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims abstract description 6
- 230000005284 excitation Effects 0.000 claims abstract description 5
- 230000003321 amplification Effects 0.000 claims abstract description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 4
- 238000010041 electrostatic spinning Methods 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 229920005594 polymer fiber Polymers 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001523 electrospinning Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000013308 plastic optical fiber Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- H01S3/05—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
- H01S3/06791—Fibre ring 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
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
The invention discloses a random laser, comprising: a pump source and a fiber network comprised of a random distribution of a plurality of optical fibers, the optical fibers comprising: the core layer is a PMMA layer (polymethyl methacrylate layer) doped with rhodamine 6G, the cladding layer is a PVDF layer (polyvinylidene fluoride layer), the refractive index of the cladding layer is greater than that of air, and the refractive index of the core layer is greater than that of the cladding layer; the pump source pumps in an oblique incidence mode, light is effectively coupled at the intersection point between the optical fibers in the fiber network through evanescent waves to form a random ring-shaped resonant cavity, and the light radiated by excitation is subjected to selective gain amplification in the random ring-shaped resonant cavity to form laser. The invention can effectively improve the condition of multiple transverse modes when the core diameter is large while ensuring that the random laser realizes directional output.
Description
Technical Field
The invention belongs to the technical field of laser, and particularly relates to a random laser.
Background
The random laser is a new type of laser, and has been receiving much attention from researchers since the early stage of development due to its special light-emitting mechanism and light-emitting characteristics. The random laser based on the high polymer material fiber also draws attention in recent years, and the electrostatic spinning is a good way for preparing the high polymer fiber, and the prepared high polymer fiber restrains light in the fiber in a waveguide mode to be transmitted and amplified, and finally excites the random laser.
In 2014, Sarah
Et al report cavity lasing based on random distribution in polymer optical fiber networks. The rhodamine 6G doped PMMA fiber network is prepared through electrostatic spinning, light is effectively coupled among polymer fibers, so that the formation of a ring-shaped resonant cavity is promoted, random laser is generated through laser excitation of 532nm, and the generation of the random laser is well explained through the theory of the ring-shaped resonant cavity (Sarah)
et al.,Adv.Mater.2014,26:8096-8100.)。
At present, the random laser based on electrostatic spinning is only based on a common waveguide structure, namely, air is used as a cladding structure, and the condition of multiple transverse modes generated when the core diameter is increased cannot be overcome.
Disclosure of Invention
The invention aims to overcome the condition of multiple transverse modes when the core diameter is increased, and provides a random laser.
The purpose of the invention can be realized by the following technical scheme.
A random laser, comprising: a pump source and a fiber network comprised of a random distribution of a plurality of optical fibers, the optical fibers comprising: the core layer is a PMMA layer (polymethyl methacrylate layer) doped with rhodamine 6G, the cladding layer is a PVDF layer (polyvinylidene fluoride layer), the refractive index of the cladding layer is greater than that of air, and the refractive index of the core layer is greater than that of the cladding layer; the pump source pumps in an oblique incidence mode, light is effectively coupled at the intersection point between the optical fibers in the fiber network through evanescent waves to form a random ring-shaped resonant cavity, and the light radiated by excitation is subjected to selective gain amplification in the random ring-shaped resonant cavity to form laser.
Preferably, the diameter of the core layer is 0.5 to 2 μm, and the diameter of the cladding layer is 0.2 to 0.5 μm.
Preferably, the pump source is incident to the pump through an angle of 30-60 degrees with the fiber film, the pump light is coupled into the cladding, the refractive index of the cladding is larger than that of air, the pump light forms total reflection in the cladding and repeatedly passes through the core layer to provide energy for the gain medium rhodamine 6G, and the refractive index of the core layer is larger than that of the cladding, so that the light radiated by excitation is totally reflected in the core layer.
Preferably, the optical fiber is a disordered optical fiber having a waveguide structure formed by coaxial needle spinning and manufactured by an electrospinning technique.
The invention has the following beneficial effects:
(1) compared with a waveguide structure formed by a core layer and air, the waveguide structure of the optical fiber reduces the refractive index difference between the core layer and the cladding layer, thereby reducing the occurrence of the condition of multiple transverse modes when the core diameter is larger, even avoiding the occurrence of the condition of multiple transverse modes, and realizing directional output of random laser.
(2) The core cladding structure with the gain medium is prepared by directly adopting electrostatic spinning, and is simpler and more convenient compared with the core cladding structure with the gain medium prepared by wire drawing.
(3) The random laser of the invention can be applied to novel integrated photonic devices.
Drawings
FIG. 1 is a schematic illustration of a waveguide structure of an optical fiber of the present invention;
FIG. 2 is a schematic diagram of the random ring resonator of the present invention.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the examples and the accompanying drawings. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
As shown in fig. 1, a pumping source is obtained by frequency doubling of an Nd: YAG laser, pumping is performed in an oblique incidence mode (i.e., incidence at an angle of 30-60 degrees with a fiber film), pumping light is coupled into a cladding layer 2, and since the refractive index of the cladding layer 2 is larger than that of air, the pumping light forms total reflection in the cladding layer and repeatedly passes through a core layer to provide energy for a gain medium rhodamine 6G, and the refractive index of the core layer 1 is larger than that of the cladding layer 2, so that light of stimulated radiation is totally reflected in the core layer.
A random ring resonator is formed by a fiber network formed by randomly distributing a plurality of optical fibers, and as shown in FIG. 2, 5 nodes (namely intersection points between the optical fibers, at which light is coupled by evanescent waves) are shown in the figure, wherein ①②③④⑤ are respectively formed, and a random ring resonator is formed by optical coupling at the nodes, ① → ② → ③ → ④ → ⑤, laser is formed by selective gain amplification in the random ring resonator, the emitting direction of the laser is illustrated in FIG. 2, the emitting directions of other ring cavities are similar to those of the random ring resonator, the random ring resonator provides a random cavity for emitting the laser and provides gain through rhodamine 6G doped in a core layer, and a waveguide structure of the optical fibers ensures that the random laser is output from the same plane.
The optical fiber has a waveguide structure of the core cladding, so that the transverse mode of the waveguide structure can be transmitted in the core layer, and the quality of light beams is improved. It can be derived from fig. 1 and 2 that the random ring resonator can be formed approximately parallel to the plane of the fiber film, while the individual optical fibers are substantially parallel to the fiber film, and the laser emission direction thereof is also parallel to the plane of the fiber film, so that the random laser realizes the directional output.
Finally, the method of the present invention is only a preferred embodiment and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A random laser, comprising: a pump source and a fiber network comprised of a random distribution of a plurality of optical fibers, the optical fibers comprising: the core layer is a PMMA layer (polymethyl methacrylate layer) doped with rhodamine 6G, the cladding layer is a PVDF layer (polyvinylidene fluoride layer), the refractive index of the cladding layer is greater than that of air, and the refractive index of the core layer is greater than that of the cladding layer; the pump source pumps in an oblique incidence mode, light is effectively coupled at the intersection point between the optical fibers in the fiber network through evanescent waves to form a random ring-shaped resonant cavity, and the light radiated by excitation is subjected to selective gain amplification in the random ring-shaped resonant cavity to form laser.
2. The random laser of claim 1, wherein the pump source is pumped by incidence at an angle of 30-60 ° to the fiber film, the pump light is coupled into the cladding layer, the cladding layer has a refractive index greater than that of air, the pump light is totally reflected therein and repeatedly passes through the core layer to provide energy to the gain medium rhodamine 6G, and the core layer has a refractive index greater than that of the cladding layer, thereby totally reflecting the stimulated emission of light in the core layer.
3. The random laser of claim 2 wherein said core diameter is 0.5 to 2 μm and said cladding diameter is 0.2 to 0.5 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010094967.6A CN111162437A (en) | 2020-02-17 | 2020-02-17 | Random laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010094967.6A CN111162437A (en) | 2020-02-17 | 2020-02-17 | Random laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111162437A true CN111162437A (en) | 2020-05-15 |
Family
ID=70565647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010094967.6A Pending CN111162437A (en) | 2020-02-17 | 2020-02-17 | Random laser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111162437A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113363793A (en) * | 2021-05-17 | 2021-09-07 | 电子科技大学 | Random laser generation, spectrum synchronization and code sharing method |
| CN115966987A (en) * | 2023-03-16 | 2023-04-14 | 安徽科创中光科技股份有限公司 | Multi-wavelength laser capable of being screened |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1938618A (en) * | 2004-03-31 | 2007-03-28 | 富士胶片株式会社 | Plastic optical fiber and method for manufacturing the same |
| CN102801091A (en) * | 2012-09-06 | 2012-11-28 | 北京化工大学 | Random fiber laser |
| CN103326229A (en) * | 2013-06-18 | 2013-09-25 | 东南大学 | Random laser emitting device with thermo-optic switching characteristic |
| WO2017051031A1 (en) * | 2015-09-25 | 2017-03-30 | Consejo Superior De Investigaciones Cientificas (Csic) | Random laser |
| CN206401705U (en) * | 2017-01-19 | 2017-08-11 | 中国人民解放军国防科学技术大学 | A kind of high-power random fiber laser based on load hydrogen optical fiber |
| US20180341120A1 (en) * | 2018-01-30 | 2018-11-29 | University Of Electronic Science And Technology Of China | Speckle-free imaging light source based on random fiber laser using strong-coupling multi-core optical fiber |
| CN212033415U (en) * | 2020-02-17 | 2020-11-27 | 北京工业大学 | Random laser |
-
2020
- 2020-02-17 CN CN202010094967.6A patent/CN111162437A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1938618A (en) * | 2004-03-31 | 2007-03-28 | 富士胶片株式会社 | Plastic optical fiber and method for manufacturing the same |
| CN102801091A (en) * | 2012-09-06 | 2012-11-28 | 北京化工大学 | Random fiber laser |
| CN103326229A (en) * | 2013-06-18 | 2013-09-25 | 东南大学 | Random laser emitting device with thermo-optic switching characteristic |
| WO2017051031A1 (en) * | 2015-09-25 | 2017-03-30 | Consejo Superior De Investigaciones Cientificas (Csic) | Random laser |
| CN206401705U (en) * | 2017-01-19 | 2017-08-11 | 中国人民解放军国防科学技术大学 | A kind of high-power random fiber laser based on load hydrogen optical fiber |
| US20180341120A1 (en) * | 2018-01-30 | 2018-11-29 | University Of Electronic Science And Technology Of China | Speckle-free imaging light source based on random fiber laser using strong-coupling multi-core optical fiber |
| CN212033415U (en) * | 2020-02-17 | 2020-11-27 | 北京工业大学 | Random laser |
Non-Patent Citations (1)
| Title |
|---|
| MICHELE GAIO等: "A nanophotonic laser on a graph", NATURE, vol. 10, no. 226, 15 January 2019 (2019-01-15), pages 2 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113363793A (en) * | 2021-05-17 | 2021-09-07 | 电子科技大学 | Random laser generation, spectrum synchronization and code sharing method |
| CN115966987A (en) * | 2023-03-16 | 2023-04-14 | 安徽科创中光科技股份有限公司 | Multi-wavelength laser capable of being screened |
| CN115966987B (en) * | 2023-03-16 | 2023-06-06 | 安徽科创中光科技股份有限公司 | Multi-wavelength laser capable of being screened |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105140763B (en) | A kind of all -fiber high-capacity optical fiber laser | |
| CN111162437A (en) | Random laser | |
| CN102967981A (en) | Super-continuous spectrum light source based on multicore photonic crystal fiber | |
| CN101320109A (en) | Rare earth ion annular doping double-cladding optical fiber | |
| CN108879303A (en) | Full-optical-fiber oscillator based on total-reflection and partial-reflection bidirectional optical fiber end cap | |
| US6975792B1 (en) | Method and apparatus for coupling light into a waveguide using a slit | |
| CN212033415U (en) | Random laser | |
| CN102520474A (en) | Side-pumped all-fiber laser and amplifier based on all-fiber | |
| CN101764342A (en) | Multi-fiber core double-cladding active optical fiber, and pumping laser output device and method thereof | |
| CN208571217U (en) | Full-optical-fiber oscillator based on total-reflection and partial-reflection bidirectional optical fiber end cap | |
| CN106711747B (en) | Composite cavity structure optical fiber oscillator based on same-band pumping technology | |
| CN101540470A (en) | Laser | |
| CN103794973A (en) | Fiber laser, gain fiber, method for manufacturing gain fiber, and beam shaping system | |
| US9020007B2 (en) | Laser device | |
| CN106785830A (en) | A kind of the cascaded pump module and laser of resonator altogether | |
| CN110581431A (en) | Erbium-doped fluoride fiber laser and laser generation method | |
| EP1586145B1 (en) | Side-pumped fiber laser | |
| CN206422379U (en) | It is a kind of based on the Compound Cavity structured optical fiber oscillator with pump technology | |
| CN212517877U (en) | High-efficiency short-gain fiber laser | |
| CN213717242U (en) | Novel fiber laser | |
| CN201323376Y (en) | Inner cavity frequency doubling blue light fiber laser | |
| CN210465749U (en) | Large-mode-field photonic crystal fiber based on fiber laser | |
| CN110690639B (en) | High efficiency injection locked fiber taper laser | |
| CN203180303U (en) | Heat-inhibiting fiber laser | |
| CN107749563B (en) | Single-slice integrated semiconductor accidental laser based on directional scatter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |