Shenzhen University

Dahua Dai

Ying Li

Dianyuan Fan

Haizhe Zhong

Chengchuan Liang

Botian Wang

Zhaoxing Liang

Yuhai Liang

The present disclosure relates to a broadband optical parametric chirped pulse amplifier insensitive to temperature comprises the first pulsed laser, the second pulsed laser, a pulse stretcher and a periodically poled nonlinear crystal. Via the proper arrangement of the non-collinear angles between the transmission directions of the signal light, the pump light and the idler light, to 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 optical parametric chirped pulse amplifier not only can realize a broadband parametric amplification of the signal light (insensitive to wavelength), but also can effectively alleviate the phase mismatch in nonlinear crystal resulted from the excessively high local temperature (insensitive to temperature).

Broadband optical parametric chirped pulse amplifier insensitive to temperature

The present invention belongs to the technical field of lasers and provides a dual-chirped spectral optical parametric amplifier and an amplification method. A femtosecond laser assembly is configured to generate simultaneous pump and signal waves which successively pass through an input grating and an input collimator respectively. The various spectrum components of both the pump and the signal waves linearly disperse and focus on respective focal points, and present spatial chirps with opposite frequency gradients in the respective focal planes. A full-spectrum optical parametric amplification of the signal wave with the pump wave is performed via a fan-out periodically poled crystal, resulting an ultrabroad idler wave. The ultrabroad idler wave is separated from the hybrid waves via an optical splitter, and then passes successively through an output collimator and an output grating, and is Fourier transformed from frequency domain to temporal domain. An ultra-short pulsed laser with a long wavelength can be obtained eventually after a necessary dispersion compensation. The present invention provides a simple-structured optical parametric amplifier so as to obtain an ultra-short pulsed laser with a long wavelength.

Dual-chirped spectral optical parametric amplifier and amplification method

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Guangdong, China

Dahua Dai