,Broadband Asymmetric Conical Emission via Cascaded Second-Order Nonlinear Polarization during the P

• 作 者: WEN Jing JIANG Hong-Bing YU Jing YANG Hong GONG Qi-Huang
• 机 构: Department of Physics & State Key Laboratory for Mesoscopic Physics, Peking University, Beijing, 100
• 出 处: 中国物理快报（英文版）
• 发表日期: 2011年6期

We investigate the propagation of femtosecond laser pulses in a 5-mm-thick BBO crystal along the direction of type-Ⅰ phase-matched second-harmonic generation.An intensity-asymmetric broadband conical emission (500- 2000 nm) is demonstrated when a suitable chirp is introduced.It is generated by optical parametric amplification pumped by the second-harmonic light and seeded by the fundamental light which is broadened by cascaded nonlinear processes during second-harmonic generation.