CN109682763A - Laser multi-wavelength frequency multiplication detection device - Google Patents
Laser multi-wavelength frequency multiplication detection device Download PDFInfo
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- CN109682763A CN109682763A CN201811509835.4A CN201811509835A CN109682763A CN 109682763 A CN109682763 A CN 109682763A CN 201811509835 A CN201811509835 A CN 201811509835A CN 109682763 A CN109682763 A CN 109682763A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
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- 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
- H01S3/0014—Monitoring arrangements not otherwise provided for
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- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
本发明公开了一种激光多波长倍频检测装置。它包括激光(1)光路上的倍频晶体(2)和光接收器(3)，特别是倍频晶体(2)为圆柱形，圆柱形倍频晶体(2)的晶体光轴与激光(1)垂直，且与同轴心的转轴(4)连接，光接收器(3)与圆柱形倍频晶体(2)的间距≥圆柱形倍频晶体(2)的焦距；所述的圆柱形倍频晶体(2)的侧面为抛光面，所述的转轴(4)为步进电机轴。它不仅结构简单、实用，也使用方便，还极大地简化了对晶体的加工难度和大大地降低了检测的成本，更是符合了高通量结构设计中的高通量快速高效的宗旨，使其极易于广泛地商业化应用于对倍频晶体的多波长检测。
The invention discloses a laser multi-wavelength frequency doubling detection device. It includes a frequency doubling crystal (2) and an optical receiver (3) on the optical path of the laser (1), especially the frequency doubling crystal (2) is cylindrical, and the crystal optical axis of the cylindrical frequency doubling crystal (2) is the same as that of the laser (1). ) is vertical, and is connected to the concentric shaft (4), the distance between the optical receiver (3) and the cylindrical frequency-doubling crystal (2) is greater than or equal to the focal length of the cylindrical frequency-doubling crystal (2); the cylindrical frequency doubler The side surface of the frequency crystal (2) is a polished surface, and the rotating shaft (4) is a stepping motor shaft. It is not only simple and practical in structure, but also easy to use. It also greatly simplifies the processing difficulty of crystals and greatly reduces the cost of detection. It is extremely easy to be widely commercialized for multi-wavelength detection of frequency-doubling crystals.
Description
Technical field
The present invention relates to a kind of frequency multiplication detection device, especially a kind of laser multi-wavelength frequency multiplication detection device.
Background technique
Currently, in the optical property verifying of the rare earth optical function material of the special high-throughput structure design of state key, light
Learn crystalline material frequency multiplication qualitative detection be it is very cumbersome, cause be different wavelengths of light incidence angle and the optical axis of crystal folder
Angle is all different.Existing common frequency multiplication detection device is generally the lens being successively equipped on laser optical path, frequency multiplication to be measured
Crystal and optical receiver；When detection, laser is processed into the frequency multiplication to be measured of specific shape through lens focus in the wavelength according to laser
After on crystal, by the result of optical receiver detection frequency multiplication.Though this frequency multiplication detection device can detect the overtones band of crystal, Que Yecun
In shortcoming, firstly, frequency-doubling crystal to be measured need to be processed into specific shape according to the wavelength of laser, when need to crystal into
When the frequency multiplication detection of row multi-wavelength's light, then need to detect the crystal of muti-piece specific shape accordingly, not only muti-piece is specific
The processing of shaped crystals is complicated, also substantially increases the cost of detection；Secondly, the power based on laser in detection is lower, times
It needs installation lens to be focused before frequency crystal, in addition to the cost for further increasing detection, does not also meet high-throughput quick
Efficient objective.
Summary of the invention
The technical problem to be solved in the present invention place in order to overcome the shortcomings in the prior art, it is simple, real to provide a kind of structure
With laser multi-wavelength frequency multiplication detection device easy to use.
To solve technical problem of the invention, used technical solution is that laser multi-wavelength frequency multiplication detection device includes
Frequency-doubling crystal and optical receiver on laser optical path, especially:
The frequency-doubling crystal be cylinder, it is described cylinder frequency-doubling crystal the optical axis of crystal it is vertical with laser, and with it is coaxial
The shaft of the heart connects；
Spacing >=cylinder frequency-doubling crystal focal length of the optical receiver and cylindrical frequency-doubling crystal.
Further improvement as laser multi-wavelength frequency multiplication detection device:
Preferably, the side of cylindrical frequency-doubling crystal is burnishing surface.
Preferably, shaft is step motor shaft.
Beneficial effect compared with the existing technology is:
With such a structure, it only needs a cylindrical frequency-doubling crystal and is not required to condenser lens to be achieved that the more of its
The detection of wavelength frequency multiplication, is not only simple in structure, is practical, also easy to use, also greatly simplifies to the difficulty of processing of crystal and big
The earth reduces the cost of detection, has even more met the high-throughput objective rapidly and efficiently in high-throughput structure design；Make its pole
Be easy to widely commercial applications in the multi-wavelength detection to frequency-doubling crystal.
Realization mechanism of the invention are as follows:
Fig. 1 gives the analysis schematic diagram of sphere lens, can be seen that by the figure, and light is rolled over twice by a sphere lens
After penetrating, O point is finally focused on；Wherein Q point and P point are respectively the two o'clock on sphere lens, the i.e. two o'clock of light refraction, and set PQ
Length be L.Assuming that the refractive index of sphere lens is n1, the left side of lens and the medium refraction index on the right are respectively n0 and n2.
The incidence angle of light is φ, by for the first time and after second of refraction, refraction angle is respectively δ and θ.It, can be with according to Snell law
It obtains being respectively as follows: in the equation of P point and Q point
N1sin δ=n2sin θ,
Under cylindrical coordinate, the coordinate of Q point and P point can be expressed as Q (X, Z) and P (ρ, z), the first of sphere lens
Q point on face, the functional form that coordinate can also be expressed as:
X (θ)=fBtan θ+Lsin δ (θ),
Z (θ)=fB+Lcos δ (θ)；
P point on the second face of sphere lens, the functional form that coordinate can also be expressed as:
ρ (θ)=fBtan θ,
Z (θ)=fB.
When the laser light incident of different wave length, by the optical axis of crystal of rotational circle cylindricality frequency-doubling crystal, correspond to most suitable
Position, incident laser passes through cylindrical frequency-doubling crystal frequency multiplication, and frequency doubled light focuses on the other side of frequency-doubling crystal, is located at >=circle
Optical receiver at cylindricality frequency-doubling crystal focal length can be detected the laser after frequency multiplication.
Detailed description of the invention
Fig. 1 is the sphere lens analysis schematic diagram of realization mechanism of the present invention.
Fig. 2 is a kind of basic structure schematic diagram of the invention.
Specific embodiment
Preferred embodiment of the invention is described in further detail with reference to the accompanying drawing.
Referring to fig. 2, the composition of laser multi-wavelength frequency multiplication detection device is as follows:
Frequency-doubling crystal 2 and optical receiver 3 are successively equipped in 1 optical path of laser；Wherein:
Frequency-doubling crystal 2 be cylinder, the optical axis of crystal of the cylinder frequency-doubling crystal 2 is vertical with laser 1, and with it is concentric
Shaft 4 connects；The side of cylinder frequency-doubling crystal 2 therein is burnishing surface, and shaft 4 is step motor shaft.
The spacing of optical receiver 3 and cylindrical frequency-doubling crystal 2 is equal to the focal length of (also greater than) cylindrical frequency-doubling crystal 2.
When detection, the laser 1 of selected wavelength need to only be emitted to cylindrical frequency-doubling crystal 2, can be obtained by optical receiver 3
The result of frequency multiplication.
Obviously, those skilled in the art can carry out various changes to laser multi-wavelength frequency multiplication detection device of the invention
Without departing from the spirit and scope of the present invention with modification.If in this way, belonging to the present invention to these modifications and changes of the present invention
Within the scope of claim and its equivalent technologies, then the present invention is also intended to include these modifications and variations.
Claims (3)
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811509835.4A CN109682763A (en) | 2018-12-11 | 2018-12-11 | Laser multi-wavelength frequency multiplication detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811509835.4A CN109682763A (en) | 2018-12-11 | 2018-12-11 | Laser multi-wavelength frequency multiplication detection device |
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| CN109682763A true CN109682763A (en) | 2019-04-26 |
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| CN201811509835.4A Pending CN109682763A (en) | 2018-12-11 | 2018-12-11 | Laser multi-wavelength frequency multiplication detection device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5444571A (en) * | 1991-07-09 | 1995-08-22 | Thomson-Csf | Non-linear optical devices |
| CN104655592A (en) * | 2013-11-19 | 2015-05-27 | 有研光电新材料有限责任公司 | Apparatus and method for testing laser frequency doubling crystal properties |
| CN106058633A (en) * | 2016-06-01 | 2016-10-26 | 青岛镭视光电科技有限公司 | Dual-wavelength laser |
| CN107425407A (en) * | 2017-08-28 | 2017-12-01 | 天津大学 | Based on inner chamber from the tunable blue ray radiation source of frequency multiplication and implementation method |
| CN207336352U (en) * | 2017-09-27 | 2018-05-08 | 中国科学院理化技术研究所 | Deep ultraviolet ray frequency doubling testing arrangement |
| CN108281883A (en) * | 2018-01-04 | 2018-07-13 | 哈尔滨工业大学 | A kind of method of tunable laser frequency expansion |
-
2018
- 2018-12-11 CN CN201811509835.4A patent/CN109682763A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5444571A (en) * | 1991-07-09 | 1995-08-22 | Thomson-Csf | Non-linear optical devices |
| CN104655592A (en) * | 2013-11-19 | 2015-05-27 | 有研光电新材料有限责任公司 | Apparatus and method for testing laser frequency doubling crystal properties |
| CN106058633A (en) * | 2016-06-01 | 2016-10-26 | 青岛镭视光电科技有限公司 | Dual-wavelength laser |
| CN107425407A (en) * | 2017-08-28 | 2017-12-01 | 天津大学 | Based on inner chamber from the tunable blue ray radiation source of frequency multiplication and implementation method |
| CN207336352U (en) * | 2017-09-27 | 2018-05-08 | 中国科学院理化技术研究所 | Deep ultraviolet ray frequency doubling testing arrangement |
| CN108281883A (en) * | 2018-01-04 | 2018-07-13 | 哈尔滨工业大学 | A kind of method of tunable laser frequency expansion |
Non-Patent Citations (1)
| Title |
|---|
| 范琦康等: "高效率激光倍频", 《激光》 * |
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