Broadband optical parametric chirped pulse amplifier insensitive to temperature

A broadband optical parametric chirped pulse amplifier insensitive to temperature, comprising a first pulsed laser, a second pulsed laser, a pulse stretcher and a periodically poled nonlinear crystal, wherein the signal light generated by the first pulsed laser passes through the pulse stretcher, and then is coupled with the pump light generated by the second pulsed laser in the periodically poled nonlinear crystal, during the coupling process, the energy is transferred from the pump light to the signal light to amplify the power of the signal light and generate an idler light, wherein the signal light, the pump light and the idler light passing through the periodically poled nonlinear crystal are non-collinear, and the non-collinear angles therebetween simultaneously satisfy the angular relationship required for constructing the non-collinear phase-matching configuration insensitive to wavelength and that required for constructing the non-collinear phase-matching configuration insensitive to temperature;

• the periodic grating of the periodically poled nonlinear crystal has the ability to constitute a wave-vector quadrangle with the wave vectors of ks(T0), kp(T0), ki(T0) and kg, wherein the ks(T0) represents the wave vector of the signal light at the central wavelength and the preset phase-matching temperature T0, and the kp(T0) represents the wave vector of the pump light at the central wavelength and the preset phase-matching temperature T0, and the ki(T0) represents the wave vector of the idler light at the central wavelength and the preset phase-matching temperature T0, and the kg=2π/Λ represents the grating wave vector of the periodically poled nonlinear crystal, wherein the Λ represents the grating period of the periodically poled nonlinear crystal.