Author Affiliations
Abstract
1 Guangzhou Key Laboratory for Special Fiber Photonic Devices and Applications & Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, South China Normal University, Guangzhou 510006, China
2 Department of Mechanical and Electrical Engineering, Shandong Polytechnic College, Jining 272067, China
High-repetition-rate (HRR) pulsed fiber lasers have attracted much attention in various fields. To effectively achieve HRR pulses in fiber lasers, dissipative four-wave-mixing mode-locking is a promising method. In this work, we demonstrated an HRR pulsed fiber laser based on a virtually imaged phased array (VIPA), serving as a comb filter. Due to the high spectral resolution and low polarization sensitivity features of VIPA, the 30 GHz pulse with high quality and high stability could be obtained. In the experiments, both the single-waveband and dual-waveband HRR pulses were achieved. Such an HRR pulsed fiber laser could have potential applications in related fields, such as optical communications.
dissipative four-wave-mixing high-repetition-rate pulse virtually imaged phased array Chinese Optics Letters
2020, 18(7): 071403
西北核技术研究所 激光与物质相互作用国家重点实验室，陕西 西安 710024
设计了一种用于高重复频率脉冲激光能量测量的峰值保持电路。电路由电荷积分器、2阶低通滤波器、时间延迟触发器和峰值保持器组成，通过将光电流脉冲转换成电压脉冲，电压脉冲的峰值与对应电流脉冲所包含的能量成正比。实验测量结果表明：该电路可以测量脉宽＜10 ns，重复频率≥2 kHz的重频窄脉冲激光的脉冲能量，且工作稳定，其线性动态范围≥140倍。该电路可应用于光电阵列探测系统中，能实现较高的空间分辨力。
激光能量测量 高重复频率脉冲激光 峰值保持电路 电荷积分器 laser energy measurement high-repetition-rate pulse laser peak value hold circuit charge integrator
