基于FPGA的Kerr光孤子频率梳主动控制系统实现

doi:10.11938/cjmr20253167

波谱学杂志

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基于FPGA的Kerr光孤子频率梳主动控制系统实现

刘康琦1,曲明飞2,李晨虹1,王鹏飞3,赵峰2,康松柏3*

1. 中国科学院精密测量科学与技术创新研究院，湖北武汉 430071；2. 中国科学院原子频标重点实验室，湖北武汉430071；3. 中国科学院大学，北京 100049

收稿日期:2025-05-19 修回日期:2025-06-30 出版日期:2025-07-01 在线发表日期:2025-07-01
通讯作者: 康松柏 E-mail:kangsongbai@wipm.ac.cn

Implementation of an active control system for Kerr soliton optical frequency comb based on FPGA

LIU Kangqi1,2,3，LI Chenhong1,2,3，QU Mingfei1,2,3，WANG Pengfei1,2，ZHAO Feng1,2，KANG Songbai1,2*

1. Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China; 2. Key Laboratory of Atomic Frequency Standards, Chinese Academy of Sciences, Wuhan 430071, China; 3. University of Chinese Academy of Sciences, Beijing 100049, China

Received:2025-05-19 Revised:2025-06-30 Published:2025-07-01 Online:2025-07-01
Contact: KANG Songbai E-mail:kangsongbai@wipm.ac.cn

摘要/Abstract

摘要： Kerr光孤子频率梳因具备毫米级尺寸、低阈值泵浦光功率等特点，是目前芯片级光频原子钟研究的热点技术之一．Kerr光孤子形成过程中腔内功率骤降，热效应引起的腔频漂移会显著缩短Kerr光孤子频率梳的寿命．目前已有孤子功率控制、Pound-Drever-Hall（PDH）锁频技术以及辅助激光模式等多种主动控制方法来长时稳定Kerr光孤子的研究报道，但是应用于这些方案的电子学控制系统研究则鲜有报道．本文开发一种基于现场可编程逻辑门阵列（Field-Programmable Gate Array, FPGA）的Kerr光孤子光梳的主动控制系统，并通过孤子功率控制和PDH频率控制两种主动控制方法，分别在MgF₂和CaF₂微腔中实现了Kerr光孤子光学频率梳长时间稳定．该控制系统也可以用于其他微腔光梳平台（如Si₃N₄、AlN、SiO₂）的Kerr孤子光梳产生与稳定．

关键词: Kerr光孤子频率梳, 主动控制, 现场可编程逻辑门阵列

Abstract: Kerr soliton frequency combs have emerged as a key technology for chip-scale optical atomic clock. However, the intracavity power drop during Kerr soliton formation leads to the cavity frequency drift, which limits the lifetime of the frequency combs. Some active control methods have been reported such as power control, PDH frequency locking, and auxiliary laser mode. But the control systems used for these methods are rarely reported. This work presents an FPGA-based active control system for stabilizing Kerr soliton frequency combs. It can stabilize the Kerr soliton combs in both MgF? and CaF? microresonators by the power control and PDH frequency locking methods. This system can be uesd for other platforms (e.g., Si?N?, AlN, SiO?) for Kerr soliton generation and stabilization.

Key words: Kerr soliton comb, active control, FPGA

刘康琦李晨虹曲明飞王鹏飞赵峰康松柏. 基于FPGA的Kerr光孤子频率梳主动控制系统实现[J]. 波谱学杂志, doi: 10.11938/cjmr20253167.

LIU Kangqi, LI Chenhong, QU Mingfei, WANG Pengfei, ZHAO Feng, KANG Songbai. Implementation of an active control system for Kerr soliton optical frequency comb based on FPGA[J]. Chinese Journal of Magnetic Resonance, doi: 10.11938/cjmr20253167.

基于FPGA的Kerr光孤子频率梳主动控制系统实现

Implementation of an active control system for Kerr soliton optical frequency comb based on FPGA

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