CN101359145A - Optical structure with stable laser output light spot - Google Patents
Optical structure with stable laser output light spot Download PDFInfo
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- CN101359145A CN101359145A CNA2008100986157A CN200810098615A CN101359145A CN 101359145 A CN101359145 A CN 101359145A CN A2008100986157 A CNA2008100986157 A CN A2008100986157A CN 200810098615 A CN200810098615 A CN 200810098615A CN 101359145 A CN101359145 A CN 101359145A
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Abstract
An optical structure which can output stable laser spots comprises a pumping source, as well as an optical coupling lens, working substances, a focusing optical component, an optical filter and a collimating optical component which are arranged in sequence along the direction of the pumping source; wherein, the optical filter is a single-mode fiber segment. The single-mode fiber in the optical structure is equivalent to a spatial filter or an orifice diaphragm; when the pumping current inputted into a semiconductor laser or the ambient temperature changes, the position of the spot outputted by the laser changes at the same time; some of the laser light can not enter the single-fiber optical fiber core and is thereby wasted; only the light intensity of the light coupled into the single-mode fiber changes, the output spot position at the single-mode fiber exit end face does not change, so as to ensure that the entire laser system output spots no longer change to form a laser system with stable output spot height. The optical structure can be widely used in the optical measurement system, and has simple structure and low cost.
Description
Technical field
The present invention relates to a kind of optical texture, refer to be applied to make in the laser measurement system the stable optical texture of output laser spot especially.
Background technology
In semiconductor pump laser, when the pumping current variation of importing pumping source or variation of ambient temperature, laser instrument output light spot position also often changes simultaneously, and semiconductor pumped micro-slice laser changes especially obvious.In laser therapy, laser hologram in the optical measuring systems such as delicate metering, especially requires the laser spot of output stable.This has limited the particularly semiconductor pumped micro-slice laser of semiconductor pump laser to a great extent and has used in optical measuring system.
One document number is that the invention of CN2754113Y proposes the device that a kind of noise spectra of semiconductor lasers output laser carries out shaping, it comprises LD, collimation lens set, focus lens group, collimation lens and optical filter, wherein optical filter is made of kapillary, single-mode fiber and the film that is in the light, single-mode fiber is located in the kapillary, end face capillaceous is coated with the film that is in the light, the center membrane that is in the light is provided with the printing opacity circular hole, and its diameter equals the core diameter of single-mode fiber greatly.The described single-mode fiber of this semiconductor laser device beam shaping device need be located in the kapillary, also need the film that is in the light at end face plating band printing opacity circular hole capillaceous, and the aperture of printing opacity circular hole must not be less than the core diameter of single-mode fiber, coating process is required high, its structure is complicated slightly in a word, cost is higher, is not suitable for the particularly semiconductor pumped micro-slice laser of semiconductor pump laser.
Summary of the invention
The technical problem to be solved in the present invention is: according to the requirement of optical measuring system to the particularly semiconductor pumped micro-slice laser of semiconductor pump laser, a kind of stable optical texture of semiconductor pump laser output laser spot that makes is provided, and it is simple in structure, cost is low.
Technical scheme of the present invention is: a kind of optical texture of stable laser output light spot, it comprises pumping source, along optical coupling lens, operation material, focusing optical element, optical fiber filter, collimation optics that the pumping direction sets gradually, wherein said optical fiber filter is the single-mode fiber section.
As preferably, pumping source of the present invention is a semiconductor laser.
As preferably, the microplate of operation material of the present invention for constituting by gain medium gummed nonlinear crystal.
As preferably, single-mode fiber section of the present invention is a polarization-maintaining single-mode fiber.
As preferably, single-mode fiber section of the present invention be arranged in the ceramic capillary and both ends of the surface through optical polish.
As preferably, single-mode fiber section both ends of the surface of the present invention are coated with anti-reflection film.
The invention has the beneficial effects as follows: the single-mode fiber equivalence is a spatial filter or smallcolumn diaphragm in the above-mentioned optical texture, when the pumping current of importing semiconductor laser or variation of ambient temperature, it is that the laser beam center produces minor shifts that laser instrument output light spot position changes simultaneously, part laser can not enter the single fiber fiber core and be depleted, the light intensity that just is coupled in the single-mode fiber changes, and single-mode fiber outgoing end face output light spot position does not change, guarantee that promptly whole Optical Maser System output luminous point no longer changes, thereby form the high stability laser system of output luminous point.The present invention adopts the effective light beam of a bit of single-mode fiber as laser instrument output, thereby guarantee the stable of output laser spot position, it is little to take up room simultaneously, thereby can be widely used in semiconductor pumped laser instrument, particularly semiconductor pumped micro-slice laser, and make semiconductor pump laser can be widely used in optical measuring system, have characteristics such as simple in structure, that cost is low.
Description of drawings
Fig. 1 is a principle of the invention structural drawing;
Embodiment
As shown in Figure 1, the optical texture of stable laser output light spot comprises pumping source and the optical coupling lens 102 that sets gradually along the pumping direction, operation material, focusing optical element, optical fiber filter, collimation optics.Wherein pumping source can be arc lamp, flashlamp or laser diode, and it is semiconductor laser 101 that present embodiment adopts laser diode; Optical coupling lens 102 is made of collimation lens and condenser lens; Operation material can be single Nd:YVO4, Nd:YAG or similar laser crystal, it can produce the fundamental frequency light of respective wavelength, can also be the microplate 103 that present embodiment adopted, its can produce frequency doubled light or and light frequently, bonding or gummed nonlinear crystal (as frequency multiplication such as KTP, BBO and crystal frequently) constitutes this microplate by gain medium (as Nd:YVO4, Nd:YAG or similar laser crystal); The focusing optical element is convergent lens 104 or convergent lens group, it can be single lens such as GRIN Lens, can also be a lens combination, become that it can be coupled to the laser beam 107 of micro-slice laser output the A point of single-mode fiber incident end face as assembling lens combination by a beam expanding telescope and; Optical fiber filter is a single-mode fiber section 105, its can for non-guarantor partially or polarization-maintaining single-mode fiber, described single-mode fiber section 105 is arranged in glass or the ceramic capillary and both ends of the surface process optical polish, for the loss that reduces laser beam 107 can plate corresponding anti-reflection film at single-mode fiber incident end face and/or outgoing end face.This single-mode fiber section 105; Collimation optics is a collimation lens 106.
Single-mode fiber 105 equivalences are a spatial filter or smallcolumn diaphragm in the above-mentioned optical texture, when the pumping current of importing semiconductor laser 101 or variation of ambient temperature, it is that laser beam 107 centers produce minor shifts that laser instrument output light spot position changes simultaneously, part laser can not enter the single fiber fiber core and be depleted, the light intensity that just is coupled in the single-mode fiber changes, and single-mode fiber outgoing end face B point output optical position does not change, guarantee that promptly whole Optical Maser System output luminous point no longer changes, thereby form the high stability laser system of output luminous point.
The present invention adopts a bit of single-mode fiber as effective light beam of laser instrument output, thereby guarantee the stable of Output of laser light spot position, it is little to take up room simultaneously, thereby can be widely used in semiconductor pumped laser instrument, semiconductor pumped micro-slice laser particularly, and make semiconductor pump laser can be widely used in optical measuring system, have the characteristics such as simple in structure, that cost is low.
Claims (9)
1, a kind of optical texture of stable laser output light spot, it comprises pumping source, optical coupling lens, operation material, focusing optical element, optical fiber filter, collimation optics along the pumping direction sets gradually is characterized in that: described optical fiber filter is the single-mode fiber section.
2, the optical texture of stable laser output light spot according to claim 1 is characterized in that: described pumping source is a semiconductor laser.
3, the optical texture of stable laser output light spot according to claim 1 and 2 is characterized in that: the microplate of described operation material for being made of gain medium gummed nonlinear crystal.
4, the optical texture of stable laser output light spot according to claim 1 is characterized in that: described single-mode fiber section is a polarization-maintaining single-mode fiber.
5, the optical texture of stable laser output light spot according to claim 3 is characterized in that: described single-mode fiber section is a polarization-maintaining single-mode fiber.
6, according to the optical texture of any one the described stable laser output light spot in the claim 1,2,4 and 5, it is characterized in that: described single-mode fiber section is arranged in the ceramic capillary and both ends of the surface process optical polish.
7, the optical texture of stable laser output light spot according to claim 3 is characterized in that: described single-mode fiber section is arranged in the ceramic capillary and both ends of the surface process optical polish.
8, the optical texture of stable laser output light spot according to claim 6 is characterized in that: described single-mode fiber section both ends of the surface are coated with anti-reflection film.
9, the optical texture of stable laser output light spot according to claim 7 is characterized in that: described single-mode fiber section both ends of the surface are coated with anti-reflection film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100986157A CN101359145A (en) | 2008-05-30 | 2008-05-30 | Optical structure with stable laser output light spot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100986157A CN101359145A (en) | 2008-05-30 | 2008-05-30 | Optical structure with stable laser output light spot |
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| CN101359145A true CN101359145A (en) | 2009-02-04 |
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| CNA2008100986157A Pending CN101359145A (en) | 2008-05-30 | 2008-05-30 | Optical structure with stable laser output light spot |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106769714A (en) * | 2017-02-28 | 2017-05-31 | 珠海真理光学仪器有限公司 | Laser particle analyzer |
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2008
- 2008-05-30 CN CNA2008100986157A patent/CN101359145A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106769714A (en) * | 2017-02-28 | 2017-05-31 | 珠海真理光学仪器有限公司 | Laser particle analyzer |
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Open date: 20090204 |