High-power narrow-linewidth continuous wave visible light optical parametric oscillator

Abstract

The invention discloses a high-power narrow-linewidth continuous wave visible light optical parametric oscillator, comprising a pump laser and an annular resonant cavity; pump light generated by the pump laser enters the resonant cavity from an input mirror, and is reflected to an optical parametric oscillator nonlinear crystal by a first reflector for transformation; signal light, idler frequency light and rest pump light are output, and the rest pump light passes through a second reflector and a third reflector and then is output; the signal light is reflected to the input mirror by the second reflector, the third reflector, a fourth reflector, an optical parametric oscillator-frequency doubling nonlinear crystal and an output mirror and enters the resonant cavity for continuous oscillation; the idler frequency light is converted into broadband visible light laser by the second reflector, the third reflector, the fourth reflector and the optical parametric oscillator-frequency doubling nonlinear crystal and is output by the output mirror. Single frequency laser of 400nm-540nm is taken as a pumping source, and the annular cavity is taken as the resonant cavity, so the output power is increased, the beam quality is improved, and the linewidth is reduced.

Description

technical field [0001] The present invention relates to the fields of medical care equipment and biomedicine, and more particularly, the present invention relates to a continuous wave visible light optical parametric oscillator with high power and narrow line width. Background technique [0002] Tunable coherent light sources have important application prospects in many fields such as medical diagnosis and treatment, laser ranging, nonlinear optics, atmospheric environment detection, and spectral measurement. Tunable lasers are currently commonly used titanium-doped sapphire lasers, dye lasers, color center lasers and optical parametric oscillators. Among them, the tunable wavelength range of Ti:sapphire laser reaches 650-1100nm. The 475-630nm band can only be achieved by dye lasers, but it is difficult for dye lasers to achieve narrow linewidth single-frequency operation. There are also some other solid and gas lasers such as neodymium-doped lasers, helium-neon lasers, fi...

AI Technical Summary

Problems solved by technology

The 475-630nm band can only be achieved by dye lasers, but it is difficult for dye lasers to achieve narrow linewidth single-frequency operation

[0007] But generally speaking, the continuous tuning wavelength range that continuous wave OPO technology can achieve is still relatively small, especially concentrated in the near-infrared band, and there are still relatively few research results on laser output in the visible light band.

At the same time, the beam quality is not good enough, the laser line width is wide, and the output power is not high enough

Images