CPC G02F 1/39 (2013.01) [G02B 27/286 (2013.01); G02F 1/3503 (2021.01); G02F 1/3553 (2013.01); G02F 1/37 (2013.01); G02F 2203/03 (2013.01); G02F 2203/24 (2013.01); H01S 3/0071 (2013.01); H01S 3/0092 (2013.01)] | 9 Claims |
1. A wavelength conversion system comprising a transport system for a laser beam comprising:
a first lambda quarter-wave plate adapted to convert a polarization of linear beam from linear polarization laser generator at 532 nm to a circular polarization laser beam;
an articulated arm comprising a mirror at each of its joints, arranged at 45° with respect to said laser beam;
each of said mirrors having a phase shift between the reflected components of less than 10°;
a second lambda quarter-wave plate for converting said laser beam from circular polarization to linear polarization and providing a linear polarization output laser beam;
a non-linear converter for converting the wavelength of said output laser beam from a first wavelength to a second wavelength;
wherein the non-linear converter is a parametric oscillator with a KTP crystal, and wherein the KTP crystal is rotatable so as to cause adjustment of the wavelength of the output laser beam;
wherein the KTP crystal has a length between 10 and 30 mm and includes an aperture, cut to obtain type 1 phase matching at angles of θ=54.5° and φ=0° to generate a signal at 755 nm and an idler at 1801 nm.
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