Single frequency visible laser

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 inputend 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...

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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

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