CN102055129A - Self-stimulated Raman sum frequency laser wavelength conversion device with compact structure - Google Patents
Self-stimulated Raman sum frequency laser wavelength conversion device with compact structure Download PDFInfo
- Publication number
- CN102055129A CN102055129A CN 201010549465 CN201010549465A CN102055129A CN 102055129 A CN102055129 A CN 102055129A CN 201010549465 CN201010549465 CN 201010549465 CN 201010549465 A CN201010549465 A CN 201010549465A CN 102055129 A CN102055129 A CN 102055129A
- Authority
- CN
- China
- Prior art keywords
- self
- sum frequency
- wavelength
- conversion device
- wavelength conversion
- 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
- 238000001069 Raman spectroscopy Methods 0.000 title claims abstract description 52
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 20
- 239000013078 crystal Substances 0.000 claims abstract description 37
- 230000008878 coupling Effects 0.000 claims abstract description 12
- 238000010168 coupling process Methods 0.000 claims abstract description 12
- 238000005859 coupling reaction Methods 0.000 claims abstract description 12
- 239000012528 membrane Substances 0.000 claims 1
- 230000007704 transition Effects 0.000 description 13
- 238000005516 engineering process Methods 0.000 description 9
- 230000003287 optical effect Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 5
- 238000002310 reflectometry Methods 0.000 description 4
- 230000003993 interaction Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000001902 propagating effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000013598 vector Substances 0.000 description 1
Images
Landscapes
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The invention discloses a self-stimulated Raman sum frequency laser wavelength conversion device with a compact structure. The device comprises a public resonant cavity which comprises a common resonant cavity mirror and a common output coupling mirror, wherein a self-stimulated Raman scattering medium and a nonlinear sum frequency crystal are arranged between the common resonant cavity mirror and the common output coupling mirror in turn. The self-stimulated Raman sum frequency laser wavelength conversion device with the compact structure can effectively increase the number of available single-spectral line laser wavelengths.
Description
Technical Field
The invention relates to a laser wavelength conversion device, in particular to a stimulated Raman sum frequency laser wavelength conversion device with a compact structure.
Background
Generally, the output laser wavelength of the solid laser comes from the energy level transition of the laser material, the number of solid laser materials which can be practically used is not large, and each solid laser material only has a few available laser transition spectral lines, so that the practical single spectral line wavelength cannot meet the increasing demand.
With the research and development of nonlinear optical frequency conversion technology and corresponding nonlinear optical crystal, the nonlinear optical frequency conversion technology can convert the wavelength from the energy level transition of the laser crystal into a new laser wavelength, and the technologies are respectively called nonlinear optical frequency doubling, sum frequency, difference frequency, optical parametric conversion and the like. In nonlinear optics and sum frequency technology, the most common laser light of two different wavelengths participating in sum frequency is from energy level transition of laser material, for example, the two sub-resonators of U.S. patent No.5.345.457 generate two fundamental frequency light of 1064nm and 1318nm, respectively, through energy level transition of two laser crystals, and the two fundamental frequency light beams generate 589nm wavelength output through the sum frequency crystal at the common coincidence part of the resonator. Similar domestic technology has issued patent application number 200410010917.6 which proposes a folded cavity structure with sum frequency inside the cavity. There are also U.S. patent nos.: US20040125834a1, which is a technique in which two different wavelengths of fundamental light, referred to as sum frequencies, are obtained from a quasi-three level transition of a solid laser material, and the other from a four level transition of the solid laser material.
Another method of laser frequency conversion is a stimulated raman scattering technique, which converts fundamental frequency light incident on and passing through a raman scattering medium into laser light of a new wavelength by frequency shift caused by stimulated raman scattering of the raman scattering medium. The laser with the new wavelength can be converted into laser with another wavelength by the nonlinear optical frequency doubling technology. Chinese patent applications for such frequency doubling technology of raman laser are 200810138022.9 and 200720029555.4, respectively.
Disclosure of Invention
The invention aims to provide a stimulated Raman sum frequency laser wavelength conversion device with a compact structure by combining the background technology, and further broadens the number of available single-spectral-line laser wavelengths.
In order to solve the technical problems and achieve the purpose, the invention is realized by the following technical scheme:
a self-stimulated Raman scattering medium and a nonlinear sum frequency crystal are sequentially arranged between the common resonant cavity mirror and the common output coupling mirror.
Preferably, a new self-excited raman scattering medium is formed by preparing the related film system sharing the resonator cavity mirror on the input surface of the self-excited raman scattering medium, so as to eliminate a separate lens, wherein the surface of the new self-excited raman scattering medium can be a concave surface, a plane surface or a convex surface.
The compact-structure stimulated Raman sum frequency laser wavelength conversion device has the following working principle:
when the self-excited Raman scattering medium in the common resonant cavity is pumped by the pump light emitted by the external light source, transition wavelengths λ are respectively generated at different energy levels of the self-excited Raman scattering medium0And the second wavelength is lambda2Laser energy level transition laser. Wherein the wavelength is λ0Is oscillated in a common resonant cavity, and the second wavelength is lambda2Also propagating oscillation within the common resonant cavity. The wavelength is lambda0When the laser beam passes through the self-stimulated Raman scattering medium, the wavelength is lambda due to the stimulated Raman scattering effect0Produces a first wavelength lambda1And still propagating the oscillation within the common resonator. When the first wavelength is lambda1The stimulated Raman shift laser beam and the second wavelength are lambda2When laser beams are simultaneously incident and pass through the nonlinear sum frequency crystal, a difference is generated between the first and second laser beams due to nonlinear sum frequency interactionA wavelength of λ1And the second wavelength is lambda2Of a new third wavelength of3And output by a common output coupling mirror.
Wherein, said λ1、λ2And λ3Should satisfy the sum frequency relation 1/lambda3＝1/λ2+1/λ1. The nonlinear sum frequency crystal needs to be at the lambda1And λ2Is cut in a phase matching direction of the nonlinear sum frequency interaction such that said λ2、λ3And λ1Satisfy the phase matching relation when propagating in the nonlinear sum frequency crystalWherein,
and
are all vectors and are respectively said wavelength λ1Stimulated Raman shift laser of wavelength lambda2Laser energy level transition laser and wavelength of lambda3The sum frequency laser light has a refractive index as it propagates in the nonlinear sum frequency crystal.
By applying the technology, the stimulated Raman sum frequency laser wavelength conversion device with the compact structure can effectively broaden the number of available single-spectral-line laser wavelengths.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and embodiments.
Fig. 1 is a schematic structural diagram of an embodiment of the compact-structure stimulated raman and sum frequency laser wavelength conversion device of the present invention.
Fig. 2 is a schematic diagram of a further improved structure of the embodiment disclosed in fig. 1.
The reference numbers in the figures illustrate: 1. the self-excited Raman scattering medium comprises a shared resonant cavity mirror, 2 self-excited Raman scattering medium, 3 nonlinear sum frequency crystal, 4 shared output coupling mirror and 5 novel self-excited Raman scattering medium.
Detailed Description
Example 1:
referring to fig. 1, a stimulated raman sum frequency laser wavelength conversion device with a compact structure includes a common resonant cavity, where the common resonant cavity includes a common resonant cavity mirror 1 and a common output coupling mirror 4, and a self-stimulated raman scattering medium 2 and a nonlinear sum frequency crystal 3 are sequentially disposed between the common resonant cavity mirror 1 and the common output coupling mirror 4.
Preferably, referring to fig. 2, a new self-excited raman scattering medium 5 is formed by preparing the relevant film system of the common resonator cavity mirror 1 on the input surface of the self-excited raman scattering medium 2, thereby eliminating a separate lens, wherein the surface of the new self-excited raman scattering medium 5 can be a concave surface, a plane surface or a convex surface.
The invention is described in further detail below in the preferred embodiments:
GdVO4 self-excited Raman crystal, the surface of which opposite to the nonlinear sum frequency crystal 3 can be a plane or a curved surface, is adopted by the novel self-excited Raman scattering medium 5, the reflectivity of light beams with the wavelengths of 1064nm, 1342nm and 1175nm is more than 99.5%, the transmittance of light beams with the wavelengths of 808nm is more than 90%, and an antireflection film with the transmittance of light beams with the wavelengths of 1064nm, 1342nm and 1175nm is more than 99% is prepared on the other side.
Furthermore, the nonlinear sum frequency crystal 3 adopts a nonlinear sum frequency crystal such as LBO, BiBO, KTP or KTA and the like, cutting is carried out according to the phase matching direction of the wavelength of 1342nm and the wavelength of 1175nm sum frequency generation 626nm, and antireflection films for light beams with four wavelengths such as 1064nm, 1342nm, 1175nm and 626nm are prepared on two light passing surfaces of the nonlinear sum frequency crystal 3.
Furthermore, the surface film system close to the nonlinear sum frequency crystal 3 of the common output coupling mirror 4 is a multilayer dielectric film which is required to have the reflectivity of more than 99.5% for light beams with the wavelengths of 1064nm, 1342nm and 1175nm, an antireflection film with the transmissivity of more than 90% for the light beam with the wavelength of 626nm, and an antireflection film with the transmissivity of more than 99% for the light beam with the wavelength of 626nm is prepared on the other surface.
When the Nd: GdVO4 crystal in the Raman resonant cavity is pumped by an external light source, laser transition with the wavelength of 1064nm and 1342nm is generated, when a laser beam with the wavelength of 1064nm passes through the Nd: GdVO4 crystal, the laser with the wavelength of 1175nm is generated by frequency shifting the laser with the wavelength of 1064nm due to the stimulated Raman scattering effect, and the laser with the wavelength of 1064nm and 1342nm simultaneously propagate and oscillate in the common resonant cavity; since the nonlinear sum frequency crystal 3 is cut in the phase matching direction of 1342nm and 1175nm wavelength sum frequency generation 626nm wavelength, when the laser light with 1342nm and 1175nm wavelength is simultaneously incident and passes through the nonlinear sum frequency crystal 3, the sum frequency laser light with 626nm wavelength is generated due to the nonlinear optical sum frequency interaction and is output by the common output coupling mirror 4.
Example 2:
this embodiment has a structure similar to that of embodiment 1 except that the novel self-excited Raman scattering medium 5 uses laser transition lines of 1064nm and 1084nm wavelengths of Nd: GdVO4 self-excited Raman crystal as the wavelengths lambda0And a second wavelength lambda2The surface of the crystal opposite to the nonlinear sum frequency crystal 3 can be a plane or a curved surface, and the preparation method is characterized in thatThe reflectivity of the multilayer dielectric film to light beams with the wavelengths of 1064nm, 1084nm and 1175nm is more than 99.5%, the transmissivity of the multilayer dielectric film to light beams with the wavelengths of 808nm is more than 90%, and the transmissivity of the antireflection film to light beams with the wavelengths of 1064nm, 1084nm and 1175nm is more than 99%.
Furthermore, the nonlinear sum frequency crystal 3 adopts a nonlinear sum frequency crystal such as LBO, BiBO, KTP or KTA and the like, cutting is carried out according to the phase matching direction of the wavelength of 1084nm and the wavelength of 1175nm sum frequency generation wavelength of 564nm, and antireflection films for light beams with four wavelengths such as 1064nm, 1084nm, 1175nm and 564nm are prepared on two light passing surfaces of the nonlinear sum frequency crystal 3.
Furthermore, the surface film system of the common output coupling mirror 4 close to the nonlinear sum frequency crystal 3 is a multilayer dielectric film which is required to have the reflectivity of more than 99.5% for light beams with the wavelengths of 1064nm, 1084nm and 1175nm, an antireflection film with the transmissivity of more than 90% for the light beam with the wavelength of 564nm, and an antireflection film with the transmissivity of more than 99% for the light beam with the wavelength of 564nm is prepared on the other surface.
When the Nd: GdVO4 crystal in the Raman resonant cavity is pumped by an external light source, laser transition with the wavelength of 1064nm and 1084nm is generated, when a laser beam with the wavelength of 1064nm passes through the Nd: GdVO4 crystal, the laser with the wavelength of 1175nm is generated by frequency shifting the laser with the wavelength of 1064nm due to the stimulated Raman scattering effect, and the laser with the wavelength of 1064nm and 1084nm simultaneously propagate and oscillate in the common resonant cavity; since the nonlinear sum frequency crystal 3 is cut in the direction of matching the phase of 1084nm and 1175nm wavelength sum frequency generation 564nm wavelength, when the 1084nm and 1175nm wavelength laser light is simultaneously incident and passes through the nonlinear sum frequency crystal 3, due to the nonlinear optical sum frequency interaction, the sum frequency laser light with the wavelength of 564nm is generated and output by the common output coupling mirror 4.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (5)
1. A compact self-stimulated raman sum frequency laser wavelength conversion device comprising a common resonator including a common resonator mirror (1) and a common output coupler mirror (4), characterized in that: and a self-excited Raman scattering medium (2) and a nonlinear sum frequency crystal (3) are sequentially arranged between the common resonant cavity mirror (1) and the common output coupling mirror (4).
2. The compact self-stimulated raman and sum frequency laser wavelength conversion device of claim 1, wherein: and the related membrane system of the shared resonant cavity mirror (1) is prepared on the surface of the input end of the self-excited Raman scattering medium (2) to form a new self-excited Raman scattering medium (5).
3. The compact self-stimulated raman and sum frequency laser wavelength conversion device of claim 2, wherein: the new self-excited Raman scattering medium (5) surface can be any one of a concave surface, a plane surface or a convex surface.
4. The compact self-excited raman and sum frequency laser wavelength conversion device according to any one of claims 1 to 3, wherein: the nonlinear sum frequency crystal (3) is any one of LBO, BiBO, KTP or KTA nonlinear sum frequency crystal.
5. The compact structure stimulated raman and frequency laser wavelength conversion device according to claim 2 or 3, characterized in that: the novel self-excited Raman scattering medium (5) adopts a self-excited Raman crystal of Nd: GdVO 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010549465 CN102055129A (en) | 2010-11-18 | 2010-11-18 | Self-stimulated Raman sum frequency laser wavelength conversion device with compact structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010549465 CN102055129A (en) | 2010-11-18 | 2010-11-18 | Self-stimulated Raman sum frequency laser wavelength conversion device with compact structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102055129A true CN102055129A (en) | 2011-05-11 |
Family
ID=43959219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010549465 Pending CN102055129A (en) | 2010-11-18 | 2010-11-18 | Self-stimulated Raman sum frequency laser wavelength conversion device with compact structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102055129A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101499604A (en) * | 2008-01-31 | 2009-08-05 | 中国科学院福建物质结构研究所 | Dual wavelength frequency double laser |
| CN101572384A (en) * | 2009-03-13 | 2009-11-04 | 中国科学院福建物质结构研究所 | Combined continuous full-solid state Raman laser |
| CN201504011U (en) * | 2009-07-29 | 2010-06-09 | 中国科学院福建物质结构研究所 | All-solid-state raman frequency-doubled yellow laser |
| CN101986480A (en) * | 2009-07-29 | 2011-03-16 | 中国科学院福建物质结构研究所 | Composite self-Raman frequency-doubled yellow laser crystal module |
| CN201860030U (en) * | 2010-11-18 | 2011-06-08 | 苏州生物医学工程技术研究所 | Self-stimulated Raman sum frequency laser wavelength converting device with compact structure |
-
2010
- 2010-11-18 CN CN 201010549465 patent/CN102055129A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101499604A (en) * | 2008-01-31 | 2009-08-05 | 中国科学院福建物质结构研究所 | Dual wavelength frequency double laser |
| CN101572384A (en) * | 2009-03-13 | 2009-11-04 | 中国科学院福建物质结构研究所 | Combined continuous full-solid state Raman laser |
| CN201504011U (en) * | 2009-07-29 | 2010-06-09 | 中国科学院福建物质结构研究所 | All-solid-state raman frequency-doubled yellow laser |
| CN101986480A (en) * | 2009-07-29 | 2011-03-16 | 中国科学院福建物质结构研究所 | Composite self-Raman frequency-doubled yellow laser crystal module |
| CN201860030U (en) * | 2010-11-18 | 2011-06-08 | 苏州生物医学工程技术研究所 | Self-stimulated Raman sum frequency laser wavelength converting device with compact structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101499608B (en) | Optically parametric oscillator | |
| JP2000261081A (en) | Laser | |
| JP2008522432A5 (en) | ||
| US20070041409A1 (en) | Injection locked high power laser systems | |
| CN101483317A (en) | Pump mode for semiconductor laser | |
| JP5919740B2 (en) | Light source device and wavelength conversion method | |
| CN100395926C (en) | Cascade optical parameter oscillating laser | |
| KR100863199B1 (en) | Laser Apparatus and Method for Harmonic Beam Generation | |
| CN102044839A (en) | Bi-wavelength transition stimulated Raman sum frequency laser wavelength conversion equipment | |
| WO2006026540A2 (en) | Injection locked high power laser system | |
| JPH06102545A (en) | Wavelength converter | |
| CN209766847U (en) | All-fiber type second-order vortex optical laser | |
| US6147793A (en) | Backconversion-limited optical parametric oscillators | |
| CN102044838A (en) | Stimulated Raman sum frequency laser wavelength conversion device | |
| CN201860030U (en) | Self-stimulated Raman sum frequency laser wavelength converting device with compact structure | |
| JP2000216465A (en) | Laser resonator | |
| CN202042795U (en) | Dual wavelength transition stimulated Raman sum frequency laser wavelength conversion device | |
| CN101247020A (en) | Ultraviolet light outputting micro-piece type laser cavity structure | |
| CN105006734B (en) | A kind of 2 μm of lasers that half Intracavity OPO is formed based on body grating | |
| Jiang et al. | Synchronously pumped femtosecond optical parametric oscillator based on an improved pumping concept | |
| CN102055129A (en) | Self-stimulated Raman sum frequency laser wavelength conversion device with compact structure | |
| CN101710666A (en) | Semiconductor laser pump single longitudinal mould and frequency laser | |
| US20090207876A1 (en) | Laser Source for the Infrared Wavelength Range | |
| JP2003258341A (en) | Linear polarized fiber laser and second harmonic output resonator structure | |
| JPH01312529A (en) | Nonlinear optical element |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110511 |