上海交通大学智能微波光波融合创新中心（imLic）硕士生徐雨秋的工作——Chip-scale Brillouin instantaneous frequency measurement by use of one-shot frequency-to-power mapping based on lock-in amplification（基于锁相放大的片上布里渊测频）的相关成果近期被Chinese Optics Letters期刊接收发表，该工作得到了国家重点研发计划（2019YFB2203700）、国家自然科学基金（61822508）的部分资助。该工作提出一种基于片上硅波导中受激布里渊效应的瞬时频率测量方案。课题组长期研究基于光纤中受激布里渊测效应的频率测量技术，为了满足测频系统小型化、集成化的需求，该工作将布里渊反应介质从长距离光纤替换为片上硅波导，分析了短介质中布里渊增益不足带来的具体挑战，将锁相放大的方法引入片上测频架构，对布里渊增益进行时域积分，最终实现系统频率-功率映射。该工作对基于短介质中受激布里渊效应的相关技术研究具有一定的借鉴意义。
摘要: We demonstrate a chip-scale scheme of Brillouin instantaneous frequency measurement (IFM) in a CMOS-compatible doped silica waveguide chip. In the chip-scale Brillouin IFM scheme, the frequency-to-power mapping process is achieved by one-shot detection without additional time averaging and implemented by a lock-in amplification, which successfully detects the Brillouin gain of the doped silica waveguide chip in time domain. A Costas frequency modulated signal ranging from 8 GHz to 9 GHz is experimentally measured and the frequency measurement errors are maintained within 58 MHz.