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Single frequency visible laser

A laser and visible light technology, applied in the field of lasers, can solve problems such as system complexity, achieve good stability, meet application requirements, and achieve precise tuning effects

Active Publication Date: 2011-05-25
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The latter generally has higher output power, but optical components such as one-way devices and etalons need to be inserted into the cavity, and the system is more complicated.
However, common monolithic non-planar ring cavity lasers, such as Document 1 (Wang Xin et al., Laser Diode Pumped Monolithic High Slope Efficiency Ring Cavity Single Frequency Solid-State Laser, Chinese Laser, Volume 32, Issue 2, 2005, pp. 149-152 ), the method of inserting nonlinear components into the cavity cannot be used to generate the second harmonic. Therefore, the current all-solid-state single-frequency visible light (such as red, green, and blue light) lasers mainly use discrete component ring cavity technology to obtain

Method used

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Embodiment 1

[0035] refer to figure 2 In this embodiment, a self-frequency doubling laser that generates single-frequency 0.53 μm green light is manufactured.

[0036] In this embodiment, the self-frequency doubling crystal 1 adopts a Nd:GdCOB crystal with a doping concentration of 8at.% with a size of 25mm×20mm×6mm, and the pump end face and output end face 8 of the self-frequency doubling crystal 1 are the same face, Made into a plane, the shape of an end face opposite to the pump end face and the output end face 8 is shown in Figure 1a and Figure 1b As shown, that is, the self-frequency doubling crystal 1 adopts a monolithic optical crystal cut into the shape of a non-planar ring oscillator. exist Figure 1b The DA direction in is the type I phase matching direction with the largest effective nonlinear coefficient of the crystal, so that the light is totally reflected at points B, C, and D to form an ABCD closed loop to generate resonance, and the DA direction is selected as the la...

Embodiment 2

[0043] In this embodiment, a self-frequency doubling laser that generates single-frequency 0.66 μm red light is fabricated.

[0044] This embodiment is similar to Embodiment 1, and there are three main differences. One is that the self-frequency doubling crystal 1 uses Nd:YCOB crystals with a doping concentration of 8at.%. 0.66 μm Class I phase-matching directional cut, the specific method is similar to Example 1, which is well known and mastered by professionals; third, the crystal pump and output end faces are coated with 1.33 μm o light High reflection, high transmittance of pump light, high transmittance of 0.66μm double frequency red light.

Embodiment 3

[0046] In this embodiment, a self-frequency doubling laser that produces single-frequency 0.47 μm blue light is fabricated.

[0047] This embodiment is similar to Embodiment 1, and there are three main differences. One is that the DA direction of the self-frequency doubling crystal is cut according to the Nd:GdCOB frequency doubling of 0.96 μm to produce a 0.47 μm type I phase matching direction. The specific method is the same as that of Example 1. Similarly, this is well known and mastered by professionals; second, the film on the pump and output end faces of the crystal is changed to a film with high reflection of o light, high transmission of pump light, and high transmission of 0.47 μm frequency doubled blue light for 0.936 μm; three. Yes, the pumping device uses a Ti:Sapphire laser.

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Abstract

The invention provides a single frequency visible laser. The laser comprises a pump device, a self-frequency doubling crystal, a crystal temperature control device and magnetic field devices arranged above, at the sides of or around a crystal, wherein the pump light of the pump device is output towards the input end face of the self-frequency doubling crystal; the pump light enters into the input end face of the self-frequency doubling crystal and is effectively coupled into the crystal and is absorbed; the self-frequency doubling crystal is manufactured into single nonplanar ring cavity shape; the cutting direction of the crystal is as follows: the frequency doubling direction is DA direction, AB direction, BC direction or CD direction; the pump end face and the output end face of the self-frequency doubling crystal are coated with films in order to realize single frequency doubled light output wavelength; the films are highly transmitted by pump light, highly reflect fundamental frequency polarized light and are highly transmitted by frequency doubled light; or the pump end face and the output end face of the self-frequency doubling crystal are coated with films in order to realize simultaneous output of double wavelengths of the fundamental frequency light and the frequency doubled light, and the films are highly transmitted by pump light, reflect part of fundamental frequency polarized light and are highly transmitted by frequency doubled light. The laser has compact structure, high stability and tunable wavelength.

Description

technical field [0001] The invention relates to a laser, in particular to a single-frequency visible light all-solid-state laser based on a self-frequency doubling crystal. Background technique [0002] All-solid-state single-frequency visible light (such as red, green, and blue light) lasers have important application values ​​in the fields of quantum information optics and laser display due to their excellent coherence and wavelengths visible to human eyes. At present, the main methods of producing single-frequency laser include monolithic non-planar ring cavity technology and discrete component ring cavity technology, such as document 1 (W. Kechner, translated by Sun Wen, etc., "Solid State Laser Engineering", Science Press , 2002, pp. 126-131). The former generally has a lower output power, but has a compact structure, higher stability, narrower line width, and better beam quality. The latter generally has higher output power, but optical components such as one-way dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/16
Inventor 许祖彦宗楠韩琳王保山彭钦军王继扬张怀金王正平于浩海蒋民华
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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