title: Temperature- and wavelength-insensitive parametric amplification enabled by noncollinear achromatic phase-matching.
abstract: Optical parametric chirped-pulse amplification (OPCPA) has been demonstrated to be a promising approach for pushing femtosecond pulses towards ultra-high peak powers. However, the future success of OPCPA strongly relies on the ability to manipulate its phase-matching (PM) configuration. When a high average power pump laser is involved, the thermal effects in nonlinear crystals induce phase-mismatch distortions that pose an inherent limitation on the conversion efficiency. Here, we demonstrate that the noncollinear configuration previously adopted for wavelength-insensitive PM can be employed for temperature-insensitive PM when the noncollinear angle is properly reset. Simultaneous temperature- and wavelength-insensitive PM is realized for the first time by imposing such a temperature-insensitive noncollinear configuration with an angularly dispersed seed signal. Based on the lithium triborate crystal, the proposed noncollinear achromatic PM has a thermal acceptance 6 times larger than that of the conventional wavelength-insensitive noncollinear PM and has a sufficient spectral acceptance to support pulse durations of ~20 fs at 800 nm. These achievements open new possibilities for generating ultra-high peak power lasers with high average power.
authors: Key Laboratory for Laser Plasma (Ministry of Education), Department of Physics and Astronomy, Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China.
authors: Daolong
authors: D
authors: Tang
authors: Key Laboratory for Laser Plasma (Ministry of Education), Department of Physics and Astronomy, Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China.
authors: Jingui
authors: J
authors: Ma
authors: Key Laboratory for Laser Plasma (Ministry of Education), Department of Physics and Astronomy, Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China.
authors: Jing
authors: J
authors: Wang
authors: Key Laboratory for Laser Plasma (Ministry of Education), Department of Physics and Astronomy, Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China.
authors: Bingjie
authors: B
authors: Zhou
authors: Key Laboratory for Laser Plasma (Ministry of Education), Department of Physics and Astronomy, Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China.
authors: Guoqiang
authors: G
authors: Xie
authors: Key Laboratory for Laser Plasma (Ministry of Education), Department of Physics and Astronomy, Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China.
authors: Peng
authors: P
authors: Yuan
authors: Shanghai Engineering Research Center of Ultra-precision Optical Manufacturing, Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China.
authors: Heyuan
authors: H
authors: Zhu
authors: Key Laboratory for Laser Plasma (Ministry of Education), Department of Physics and Astronomy, Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China.
authors: Liejia
authors: L
authors: Qian