CN201392988Y - Single-longitudinal-mode output laser - Google Patents
Single-longitudinal-mode output laser Download PDFInfo
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- CN201392988Y CN201392988Y CN200920137816U CN200920137816U CN201392988Y CN 201392988 Y CN201392988 Y CN 201392988Y CN 200920137816 U CN200920137816 U CN 200920137816U CN 200920137816 U CN200920137816 U CN 200920137816U CN 201392988 Y CN201392988 Y CN 201392988Y
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- laser
- longitudinal mode
- optical
- single longitudinal
- mode output
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Abstract
The utility model relates to the laser field, in particular to the field of single-longitudinal-mode output laser. The laser comprises a laser, an optical dispersion element, an optical reflection element, an optical inversion element and a movable diaphragm. The light beam output by the laser splits the output laser with larger longitudinal mode interval in the space through the optical dispersion element, leads the light beam to return to the optical dispersion element through the optical reflection element, turns the light beam through the optical inversion element, then filters the lights departing from the central wavelength, and outputs. Further, an optical beam compression element is arranged between the optical dispersion element and the optical reflection element to compress the output lights. By adopting the technical scheme, the laser structure has a simple and reasonable structure and larger power, and can realize single-longitudinal-mode output.
Description
Technical field
The utility model relates to field of lasers, relates in particular to single longitudinal mode output laser field.
Background technology
Single longitudinal mode laser has characteristics such as monochromaticjty is good, coherence length is long, has been widely used in fields such as scientific research, optics, communication.Common realization single longitudinal mode method of operation has: the combination of short distance absorption process, FP standard general laws, Compound Cavity method, ring cavity method and said method etc.These methods respectively have limitation, and common single longitudinal mode laser is a baroque optical system, adopt ring cavity structure or wavelength choice structure more, and its volume is big, complex structure; And micro-slice laser, particularly intracavity frequency doubling micro-chip laser device, because the resonant cavity of laser is long very short, the longitudinal mode number is less, and bigger at interval, obtain single longitudinal mode easily, but its power is lower, uses wideless.
The utility model content
At above problem, the utility model proposes a kind of novel single longitudinal mode laser structure, adopt the optical element combination of high chromatic dispersion that each longitudinal mode is spatially separated at the bigger output laser of longitudinal mode spacing, thereby obtain single longitudinal mode or the output of serial single longitudinal mode.Concrete technical scheme of the present utility model is:
Single longitudinal mode output laser of the present utility model comprises: laser, optical dispersion element, optical reflection element, optical inversion element and removable diaphragm, described Laser Output Beam is spatially separated through the described optical dispersion element output laser that longitudinal mode spacing is bigger, and make light beam return light learn dispersion element by described optical reflection element, via the optical inversion element light beam is turned to again, at last again by exporting after the described removable diaphragm elimination off-center wavelength light.
Further, also being provided with the optics bundle element that contracts between described optical dispersion element and the described optical reflection element compresses the output light of optical dispersion element.
Further, described optical dispersion element is that prism beam expander or prism beam expander are right.Described optics contracts that the bundle element is made of two dispersing prisms or is made of or by the telescope that two convergent lenses the constitute beam system that contracts two prisms.
Further, described optical reflection element is speculum or reflecting grating.Described optical inversion element is refracting prisms or plane mirror or convex reflecting mirror.The bigger laser of described laser output longitudinal mode spacing.Especially, described laser is short cavity laser or micro-slice laser.
The utility model adopts as above technical scheme, be a kind of simple and reasonable, power is bigger, realize the laser structure of single longitudinal mode output.
Description of drawings
Fig. 1 is a structural principle schematic diagram of the present utility model;
Fig. 2 be optical dispersion element of the present utility model and optics contract the bundle element execution mode one schematic diagram;
Fig. 3 be optical dispersion element of the present utility model and optics contract the bundle element execution mode two schematic diagrames.
Embodiment
Now with embodiment the utility model is further specified in conjunction with the accompanying drawings.
Single longitudinal mode output laser of the present utility model comprises: laser, optical dispersion element, optical reflection element, optical inversion element and removable diaphragm, described Laser Output Beam is spatially separated through the described optical dispersion element output laser that longitudinal mode spacing is bigger, and make light beam return light learn dispersion element by described optical reflection element, via the optical inversion element light beam is turned to again, at last again by exporting after the described removable diaphragm elimination off-center wavelength light.
Consult shown in Figure 1, the laser that enforcement structure of the present utility model is adopts the bigger laser 101 of output longitudinal mode spacing, the optical dispersion element adopts change beam prism or prism group 102 to be made up of first prism 1021 and second prism 1022, optical reflection element adopts speculum or grating 103, the optical inversion element adopts changes beam steering mirror or prism 104, and removable diaphragm 105.
The laser beam that laser 101 produces is become, and 102 expansions of beam prism group are restrainted, chromatic dispersion is reflected mirror again or grating 103 reflects, and different longitudinal modes will by separating certain angle in the space behind certain stroke, can be selected required wavelength by diaphragm 105 by chromatic dispersion.Because the utility model adopts the bigger laser of output longitudinal mode spacing to produce laser, thereby adopts right quantity prism group each longitudinal mode spatially can be separated, thereby obtains single longitudinal mode output.
For a plurality of prism groups, its one way dispersion equation is:
M wherein
jBe the expansion bundle rate of j prism, dn
i/ d λ is an i prism dispersive power, M in the formula
jFollow the example of for: as i the relative prism j of prism, if get even number with the orientation, odd number is got in different orientation, A
iBe the drift angle angle of i prism, so-called one way chromatic dispersion be meant incident light by after prism beam-expanded again by flat mirror reflects, the chromatic dispersion when Yan Yuanlu returns.
For the micro-slice laser that produces 1.064 mum wavelength laser, be the Nd:YVO4 crystal of thickness 0.5mm as its gain medium, its longitudinal mode spacing Δ v=C/2L is 300GHZ, then Δ λ ≈ 1nm.If the launching spot diameter is 0.5mm, if two groups of M of employing are 10 prism, prism adopts ZF11 glass to make, and then the one way chromatic dispersion of prism group is 1.95 °/nm, and then spatially by after the 29.4mm distance, each frequencies of light could be separated; Form by gain media Nd:YVO4 crystal (thickness 0.5mm) and frequency-doubling crystal KTP (thickness 2mm) as microplate, the longitudinal mode spacing of 532nm is 0.1nm, at this moment adopt the prism group of two groups of M=10, its one way chromatic dispersion still is 1.95 °/nm, and this moment then need be by could spatially separating adjacent two longitudinal modes of 532nm behind the 147mm; For the low noise microplate of forming by gain medium Nd:YVO4 (thickness 0.5mm), frequency-doubling crystal KTP (thickness 2mm) and wave plate (0.578mm), total chamber is long to be 11.598mm, the 532nm longitudinal mode spacing is 0.04nm, adopt the prism of the ZF11 glass making of 2 M=20, then the prism group is 7 °/nm in the one way chromatic dispersion of this wavelength, minimum longitudinal mode spacing is 0.3HZ, still can be with two longitudinal modes separately.
Structure of the present utility model is applicable to all short cavity lasers, particularly micro-slice laser, also is applicable to that certain selection longitudinal mode element makes the bigger laser output laser of laser output longitudinal mode spacing.
Multilongitudianl-mode laser of the present utility model also can adopt other modes to compress the light beam that expands after restrainting after prism becomes bundle, realizes the chromatic dispersion function, obtains single longitudinal mode output.About this optics contract the bundle element the structure patent applied in, repeat no more in this.
Consult shown in Figure 2ly, laser expands bundle by the prism beam expander that is made of prism 1021 and prism 1022 to 102, again by by the cylindrical mirror of assembling 1061 with converge to first kind of optics that cylindrical mirror 1062 constitutes bundle element 106 bundle that contracts that contracts, the chromatic dispersion of acquisition laser.
Consult shown in Figure 3, laser expands bundle by the prism beam expander that is made of prism 1021 and prism 1022 to 102, the second kind of optics that constitutes by two prisms of placing with prism 1021 and prism 1022 symmetries 1071 and prism 1072 bundle element 107 bundle that contracts that contracts again, the chromatic dispersion of acquisition laser.
Because it is low that optical glass is made the prism cost, so the utility model can be made low-cost single longitudinal mode output laser.
Although specifically show and introduced the utility model in conjunction with preferred embodiment; but the those skilled in the art should be understood that; in the spirit and scope of the present utility model that do not break away from appended claims and limited; can make various variations to the utility model in the form and details, be protection range of the present utility model.
Claims (8)
1. single longitudinal mode output laser, it is characterized in that: comprise laser, optical dispersion element, optical reflection element, optical inversion element and removable diaphragm, described Laser Output Beam is spatially separated through the described optical dispersion element output laser that longitudinal mode spacing is bigger, and make light beam return light learn dispersion element by described optical reflection element, via the optical inversion element light beam is turned to again, at last again by exporting after the described removable diaphragm elimination off-center wavelength light.
2. single longitudinal mode output laser according to claim 1 is characterized in that: also be provided with the optics bundle element that contracts between described optical dispersion element and the described optical reflection element output light of optical dispersion element is compressed.
3. single longitudinal mode output laser according to claim 1 and 2 is characterized in that: described optical dispersion element is that prism beam expander or prism beam expander are right.
4. single longitudinal mode output laser according to claim 2 is characterized in that: described optics contract the bundle element constitute by two prisms or constitute by two convergent lenses.
5. single longitudinal mode output laser according to claim 1 is characterized in that: described optical reflection element is speculum or reflecting grating.
6. single longitudinal mode output laser according to claim 1 is characterized in that: described optical inversion element is refracting prisms or plane mirror or convex reflecting mirror.
7. single longitudinal mode output laser according to claim 1 is characterized in that: the bigger laser of described laser output longitudinal mode spacing.
8. single longitudinal mode output laser according to claim 7 is characterized in that: described laser is short cavity laser or micro-slice laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920137816U CN201392988Y (en) | 2009-04-20 | 2009-04-20 | Single-longitudinal-mode output laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920137816U CN201392988Y (en) | 2009-04-20 | 2009-04-20 | Single-longitudinal-mode output laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201392988Y true CN201392988Y (en) | 2010-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200920137816U Expired - Fee Related CN201392988Y (en) | 2009-04-20 | 2009-04-20 | Single-longitudinal-mode output laser |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109491073A (en) * | 2019-01-25 | 2019-03-19 | 程春丽 | A kind of optical filter |
-
2009
- 2009-04-20 CN CN200920137816U patent/CN201392988Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109491073A (en) * | 2019-01-25 | 2019-03-19 | 程春丽 | A kind of optical filter |
| CN109491073B (en) * | 2019-01-25 | 2021-06-15 | 深圳市捷迅光电有限公司 | Optical filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100127 Termination date: 20170420 |
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| CF01 | Termination of patent right due to non-payment of annual fee |