计量学报2026，Vol.47Issue(7)：957-964,8.DOI:10.3969/j.issn.1000-1158.2026.07.02
温度自适应双光梳重频数字锁定方案
Temperature Adaptive Dual-optical-comb Repetition Frequency Digital Locking Scheme
摘要
Abstract
As dual-comb technology expands beyond the laboratory,its stable operation in complex temperature environments is increasingly critical.Traditional systems lock the repetition rate to a fixed reference;however,outdoor temperature fluctuations induce thermal effects in the laser cavity,causing continuous frequency drift.With a fixed reference,the phase-locked loop(PLL)must output large compensations,easily exceeding its range and causing the system to unlock.Moreover,traditional temperature controls lack the response speed needed for harsh environments.To address this,we propose a temperature-control-free digital phase-locking scheme based on variable reference frequency compensation.By locking the repetition rate to a reference that is dynamically adjusted in real-time based on loop feedback,this method suppresses temperature-induced drift over a wide range and prevents feedback saturation and unlocking.Experimental results demonstrate stable operation across a 20～40℃range,achieving 8 days of continuous,phase-slip-free locking.The relative frequency stability reaches the 10-12 level at 1 second and the 10-17 level daily,offering a novel solution for the long-term stable operation of dual-comb systems in complex thermal environments.关键词
双光梳技术/数字锁相/可变参考频率/温度自适应/可编程门阵列Key words
dual-comb technology/digital phase-locking/variable reference frequency/temperature adaptation/field-programmable gate array(FPGA)分类
通用工业技术引用本文复制引用
金涛,林平卫,马彦宁..温度自适应双光梳重频数字锁定方案[J].计量学报,2026,47(7):957-964,8.基金项目
中国计量科学研究院基本业务费重点研究项目(AKYZD2501-2) （AKYZD2501-2）
中国计量科学研究院基本业务费探索创新项目(AKYCX2405) （AKYCX2405）
中国计量科学研究院博士后项目(BH2322) （BH2322）
