CN2453579Y - Semiconductor pump laser structure - Google Patents
Semiconductor pump laser structure Download PDFInfo
- Publication number
- CN2453579Y CN2453579Y CN 00241197 CN00241197U CN2453579Y CN 2453579 Y CN2453579 Y CN 2453579Y CN 00241197 CN00241197 CN 00241197 CN 00241197 U CN00241197 U CN 00241197U CN 2453579 Y CN2453579 Y CN 2453579Y
- Authority
- CN
- China
- Prior art keywords
- laser
- light
- optical fiber
- pump
- pump light
- 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.)
- Expired - Lifetime
Links
- 239000004065 semiconductor Substances 0.000 title claims abstract description 11
- 230000010287 polarization Effects 0.000 claims abstract description 29
- 239000013078 crystal Substances 0.000 claims abstract description 23
- 239000013307 optical fiber Substances 0.000 claims abstract description 22
- 230000010355 oscillation Effects 0.000 claims abstract description 10
- 238000005086 pumping Methods 0.000 claims description 12
- 238000007598 dipping method Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 239000000835 fiber Substances 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 241000931526 Acer campestre Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
Images
Abstract
The utility model relates to a semiconductor pump laser structure which is composed of an LD laser, a laser oscillation cavity and a coupled system composed of an optical fibre collimator, birefringent crystal, 1/2 wave plate and a self-focusing lens. The microlaser of the utility model has the advantages that various laser media which comprise isotropic and anisotropic laser gain media can be used, the problem of the fluctuation of anisotropic laser gain laser power randomly caused by the output polarization state of single-mode optical fiber is successfully solved, and simultaneously optical fiber output pump light is kept to isolate the LD laser to be used as a heat source. Owing to the small size of the utility model, the power is easily stabilized, and the utility model has major application in measurement, instrument indication, etc.
Description
This novel a kind of semiconductor pump laser structure, particularly a kind of microminiaturized semiconductor pump laser structure of utilizing optical fiber coupling pump light of relating to.
Semiconductor pumped laser microization is one of people's interest emphasis always.Adopt optical fiber coupling pump light to become a kind of technology of practicability.People have adopted and have utilized optical fiber to go out luminous point pump-coupling microchip laser, referring to: Microchip Lasers create light insmall spaces (J.J.Zay how ski, " Laser Focus world April ", 1996, P73), this structure is mainly used height and is oozed assorted Nd:YAG laser.Adopt monomode fiber end face pump-coupling that obvious advantage is arranged, optical fiber goes out the only several μ m of luminous point, it is as directly entering the laser gain medium, its numerical aperture is little, height is oozed assorted laser medium the depth as shallow point of absorption characteristics, and then pumping point is fully in the laser cavity fundamental mode volume, and optical fiber is exported pump light, and the field strictness of pumping optical mode is symmetrically and evenly in laser medium, avoid other inhomogeneous shortcoming in coupled modes troublesome pumping mould field, single-mode laser output is stablized in so easy generation; Owing to adopted optical fiber output pumping that generation pump light LD laser is separated with laser cavity, can reduce the laser volume so on the one hand simultaneously; The most important thing is that having eliminated the LD laser at microminiaturized laser heats up to the whole laser of miniature laser and the defeated determining cause element of generation laser output as largest heat source.Even to the miniature laser integrally cooling, exist wherein as the LD laser, must strengthen cooling power, increase the fin volume and make the miniature laser volume be difficult to the real required microminiaturization that realizes.
As implied above, the present this respect work of people only is used for the Nd:YAG laser.In continuous pump laser, the best laser medium of microminiaturized laser is highly doped Nd:YVO
4, because its absorption coefficient is big and absorptive pumping light temperature influence is little, its temperature range is much bigger in other words.
But the monomode fiber polarization state very easily is subjected to external disturbance and changes.Guarantee that surely the polarization direction fixes even polarization maintaining optical fibre also differs, especially be applied in mobilizable place at microlaser, crooked or the like deformation produces the polarization state that pressure also may change polarization maintaining optical fibre, and is well-known, to Nd:YVO
4This class birefringece crystal laser medium, it absorbs with the polarization direction of pump light different and different, in other words, when optical fiber is subjected to disturbance, its pump light polarization state will change, and laser medium absorbs also and changes thereupon, thereby makes semiconductor pumped laser output power be in labile state.
This novel purpose is: be applied to design in the birefringece crystal class laser medium a kind of new laser structure for solving monomode fiber output pump light.
To achieve these goals, the following structure of this novel employing, by optical fiber collimator, birefringece crystal, 1/2 wave plate, GRIN Lens constitutes coupled system, the optical fiber collimator that wherein pump light can be collimated into directional light is positioned at the end that sends of laser generator, can make the directional light pumping be split into that two bundles are parallel to each other and birefringece crystal that polarization state mutually vertically can the space be separated o light and e light is positioned at the bright dipping end of optical fiber collimator, can make and establish the orthogonal pump light of crystal from two-fold and become be parallel to each other 1/2 wave plate of pump light of same polarization direction and be positioned at birefringece crystal bright dipping end, and only can receive a branch of light of birefringece crystal, GRIN Lens is positioned at and can makes the parallel pump light of same polarization direction two bundles poly-again to the position of same focus.Laser oscillation cavity can adopt average chamber, flat-concave cavity or other laser cavity.
This is novel because pump light is adopted same polarization manipulation, then its pumping pump light polarization direction to the laser medium is unique, so no matter how pumping source optical fiber is by disturbance continuously, how its polarization state changes, but at pump light polarization on laser medium is unique, like this object Nd:YVO
4This class birefringece crystal laser medium, laser medium can not produce very high-power jump because of the pump light polarization changes to the pump light absorbed power; Even the such uniform dielectric laser of object Nd:YAG increases the matter crystal, because pump light polarization state on its pumping point is single, also can produce the output of single polarisation based, not export different polarization light and can not change with the pump light polarization, this is also extremely important in some special purpose lasers for this.
It is little that this novel microlaser has a volume, can adopt various laser mediums, comprises isotropism and different in nature separately gain medium, and successfully solve monomode fiber output polarization attitude and bring anisotropy laser gain generation laser power with the fluctuating predicament at random; Kept optical fiber output pump light to isolate the LD laser simultaneously as the thermal source advantage.This structure easily produces single-frequency output laser.Because its volume is little, is easy to power stability, to measure, others such as instrument indication are expected to bigger application.
Illustrate below in conjunction with example:
Fig. 1 is this novel index path
Fig. 2 is laser cavity structure figure commonly used
Fig. 3 is laser cavity structure figure commonly used
Fig. 4 is laser cavity structure figure commonly used
Fig. 5 is laser cavity structure figure commonly used
Fig. 6 is this new structure figure
This patent index path as shown in Figure 1,101 is single mode fiber collimator, the 106 LD lasers for the optical fiber coupling output of band isolator; It is birefringece crystal that laser enters collimater 101,102 from optical fiber 107, and its effect is that the directional light from the random polarization of collimater 101 outputs is split into O light and the e light that two fixed-directions are parallel to each other.And O light separates with e light implementation space, and polarization state is vertical mutually.103 is that relative pump light wavelength is 1/2 wave plate, its optical axis is relative with the e light polarization direction to be 45 °, make e light rotate 90 °, produce light beam with the identical polarization direction of O light, or direct addition draws revolving fragment rotatory polarization direction 90, finally makes to establish the orthogonal pump light of crystal from two-fold and become the same polarization direction pump light that is parallel to each other.104 is lens, and it is restrainted the identical polarisation optical pumping focusing that is parallel to each other with two and is focused at same focus, and it is focused on out in the laser medium.105 is little formula laser vibration chamber.Can enter the laser oscillation cavity gain medium by burnt light from 104.
105 laser oscillation cavity has Fig. 2 usually, Fig. 3, several versions of Fig. 4, Fig. 5.Because the laser resonance structure is not a this patent emphasis is not discussed, is just simply described here, Fig. 2 is a micro-slice laser, S
1Face and S
2Epiphase is parallel mutually, S
1The surface is plated in the pump light high antireflection film, the optical maser wavelength high reflection film that laser cavity is produced simultaneously, and S
2In the face of laser oscillation wavelength partial reflection, part transmission, 201 itself then is gain medium.This is for putting down cavity laser.
Among Fig. 3,301 for light increases the matter medium, and 302 are letter frequency crystal, S
1∥ S
2S
3∥ S
4, the face formation laser oscillation cavity that is parallel to each other, S
1Face face of pumped light, it is high anti-to laser oscillation wavelength, S
4In the face of fundamental frequency light is anti-high, but anti-reflection to frequency doubled light, S
2, S
3All two anti-reflection frequent to fundamental frequency light and frequency doubled light, Fig. 3 is average cavity laser.
Among Fig. 4,401 is concave mirror, S
1Face is anti-reflection to pump light, and first-harmonic is grown tall instead, and 402 is gain medium, and 403 when being ordinary optical glass, S
2To the transmission of fundamental wavelength part, constitute flat-concave cavity fundamental wavelength laser; When 403 are a frequency-doubling crystal, S
2Then high anti-to first-harmonic, anti-reflection to frequency doubled light, then whole laser cavity produces frequency doubled light.Among Fig. 5,501 is gain medium, S
1Face of pumped light is anti-reflection, and high anti-to first-harmonic, 503 is the plano-concave speculum, when 502 are frequency-doubling crystal, and S
2In the face of first-harmonic is anti-high, anti-reflection to frequency doubled light, thus constitute the vibration of flat-concave cavity double-frequency laser; S when 502 do not exist
2Then to the transmission of first-harmonic part, thereby constitute the first-harmonic resonance chamber.
Also have other kind micro resonant cavities, this patent is no longer narrated.
Fig. 6 is this novel mechanical structure chart, with different laser oscillation cavities difference is arranged slightly.Here only introduce a kind of average chamber frequency double laser structure of simple semiconductor pumping, as shown in Figure 6.
Among Fig. 6,601 is collimater, and 602 is metal base, and 603 is birefringece crystal, 604 is wave plate, 605 is the metal base of fixed lens, and 608 are lens (can directly adopt 0.25 GRIN Lens, lens surface is contacted with the gain media front end face), 606 increase the matter medium for laser, 607 is frequency-doubling crystal, and 606 and 607 constitute Ping-Ping chamber micro-slice intracavity frequency-doubling laser cavity, and the crystal optics part all directly pastes knot on metal base 602.Can constitute semiconductor pumped intracavity frequency doubling laser like this.This microlaser reduced size can be controlled in 3
*3
*About 30.Fig. 6 structure can also can add one deck overcoat at whole laser cavity separately as a device.But size is all very little.
Claims (2)
1. semiconductor pump laser structure, it is characterized in that: be by the LD laser, laser oscillation cavity, and by optical fiber collimator, birefringece crystal, 1/2 wave plate, the coupled system that GRIN Lens constitutes is formed, the optical fiber collimator that wherein pump light can be collimated into directional light is positioned at the end that sends of laser generator, can make the directional light pumping be split into that two bundles are parallel to each other and birefringece crystal that polarization state mutually vertically can the space be separated o light and e light is positioned at the bright dipping end of optical fiber collimator, can make and establish the orthogonal pump light of crystal from two-fold and become be parallel to each other 1/2 wave plate of pump light of same polarization direction and be positioned at birefringece crystal bright dipping end, and only can receive a branch of light of birefringece crystal, GRIN Lens is positioned at and can makes the parallel pump light of same polarization direction two bundles poly-again to the position of same focus.
2. a kind of semiconductor pump laser structure according to claim 1 is characterized in that laser oscillation cavity can adopt average chamber, flat-concave cavity or other laser cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00241197 CN2453579Y (en) | 2000-11-27 | 2000-11-27 | Semiconductor pump laser structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00241197 CN2453579Y (en) | 2000-11-27 | 2000-11-27 | Semiconductor pump laser structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2453579Y true CN2453579Y (en) | 2001-10-10 |
Family
ID=33601716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00241197 Expired - Lifetime CN2453579Y (en) | 2000-11-27 | 2000-11-27 | Semiconductor pump laser structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2453579Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101242070A (en) * | 2008-02-15 | 2008-08-13 | 福州高意通讯有限公司 | Solid laser of semiconductor pumping |
| CN101320883B (en) * | 2008-07-21 | 2011-06-29 | 福州高意通讯有限公司 | Single longitudinal mode laser |
| CN110455270A (en) * | 2019-08-07 | 2019-11-15 | 湖南航天机电设备与特种材料研究所 | A kind of singly polarization wide-spectrum optical fiber light source and optical fibre gyro |
-
2000
- 2000-11-27 CN CN 00241197 patent/CN2453579Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101242070A (en) * | 2008-02-15 | 2008-08-13 | 福州高意通讯有限公司 | Solid laser of semiconductor pumping |
| CN101242070B (en) * | 2008-02-15 | 2013-09-11 | 福州高意通讯有限公司 | Solid laser of semiconductor pumping |
| CN101320883B (en) * | 2008-07-21 | 2011-06-29 | 福州高意通讯有限公司 | Single longitudinal mode laser |
| CN110455270A (en) * | 2019-08-07 | 2019-11-15 | 湖南航天机电设备与特种材料研究所 | A kind of singly polarization wide-spectrum optical fiber light source and optical fibre gyro |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108899755B (en) | Tunable optical microcavity doped laser | |
| CN1722548A (en) | Pulsed laser apparatus and method | |
| CN106654823B (en) | Pass through the mode locked fiber laser system of collimator wavelength switching | |
| CN101388521B (en) | Method for realizing adjustment of laser frequency difference and laser thereof | |
| CN101859974A (en) | Narrow linewidth thulium-doped fiber laser | |
| US20040086005A1 (en) | Ultrashort pulsed laser and optical head using the same | |
| CN1295822C (en) | Convertible dual-wavelength doping optical fiber laser | |
| CN101483317A (en) | Pump mode for semiconductor laser | |
| KR100280821B1 (en) | Tunable Fiber Laser | |
| CN2453579Y (en) | Semiconductor pump laser structure | |
| CN100495835C (en) | Separate linetype cavity wavelength interval tunable single polarization dual wavelength optical fibre grating laser | |
| CN208001073U (en) | A kind of laser of all optical fibre structure tunable wave length | |
| Ju et al. | Diode-pumped tunable single-longitudinal-mode Tm, Ho: YAG twisted-mode laser | |
| CN205790922U (en) | A kind of modelocked fiber device and mode locked fiber laser | |
| CN202906186U (en) | Multi-wavelength erbium-doped photonic crystal fiber laser | |
| CN110895239A (en) | Device and method for measuring excited state absorption heat load in laser gain crystal | |
| CN1133254C (en) | Single-frequency solid laser device with pyramid prism and non-planar unidirectional travelling wave ring cavity | |
| CN113937601A (en) | Single polarization state and single longitudinal mode optical fiber laser | |
| CN2358613Y (en) | Full solidification single-frequency double frequency laser | |
| CN201000999Y (en) | Laser output dual-cladding large mode field photonic crystal fiber laser | |
| CN203250981U (en) | Fiber laser based on sound waves | |
| CN100481657C (en) | Realization method of linetype cavity single polarization dual wavelength optical fiber grating laser | |
| CN100468890C (en) | Single polarization dual wavelength optical fiber grating laser realizing method | |
| CN2454953Y (en) | Micro semiconductor pump laser device | |
| CN201838885U (en) | Titanium jewel photonic crystal fiber laser |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20101127 Granted publication date: 20011010 |