摘要
报道一种可用于超稳腔Pound-Drever-Hall(PDH)稳频的2μm波段分布Bragg反射(DBR)光纤激光器及其频率锁定结果。该绝热封装的光纤激光器配备主动温度控制和压电陶瓷(PZT)频率调谐装置,可满足超稳腔PDH稳频应用。通过周期极化铌酸锂(PPLN)晶体倍频,采用PDH稳频技术将研制的1950 nm光纤激光器频率稳定到了1μm波段超稳腔频率参考上。针对DBR光纤激光器中PZT频率调谐机制只反馈调节腔长,容易在稳频过程中产生激光器跳模进而导致频率失锁的问题,笔者提出并演示了一种对DBR光纤谐振腔实施基于超稳腔频率参考的实时温度控制方案,并采用该方案实现了对DBR光纤激光器超过4周的长期频率锁定。该方案对于实现DBR光纤激光器的长期频率锁定具有较高的参考价值。
Objective Ultrastable lasers have important applications in precision measurement,precision spectroscopy,and quantum information.However,it is difficult to meet the requirements of the aforementioned applications using lasers in the free-running state because of frequency jitter and drift caused by external environmental factors.Various active techniques for stabilizing the laser frequency have been proposed and implemented.Among them,the ultrastable cavity Pound-Drever-Hall(PDH)frequency stabilization technology has a high locking accuracy and it is mature with wide application.Single-frequency fiber lasers have undergone rapid development in recent years.Based on the fiber laser s characteristics of narrow linewidth and low noise,ultrastable lasers with superior performance are developed.However,according to current reports,the most widely used ultra-stable laser sources are DFB fiber lasers.Because the resonance cavity and the fiber grating cavity mirror of DFB fiber lasers are integrated into the same structure,the length of the laser resonance cavity and the fiber grating cavity mirror can be simultaneously controlled when used for frequency stabilization of an ultrastable cavity PDH,which is very beneficial for obtaining a long-term locked ultrastable laser.Compared with DFB fiber lasers,DBR fiber lasers have more practical value for achieving ultra-stable cavity PDH frequency stabilization because DBR fiber lasers do not require rare earth-doped fibers to exhibit photosensitivity,are easier to manufacture,and have more advantages in terms of the laser band,wavelength flexibility,and other aspects.However,when DBR fiber lasers are used for ultrastable cavity PDH frequency stabilization,owing to the independent active temperature control of the fiber resonant cavity,coordinating the frequency of the FBG center with the frequency of the ultrastable cavity mode locked by the PZT during the PDH frequency-locking process is difficult.This makes long-term locking of the frequency of the DBR fiber laser difficult
作者
刘孝兵
王彬
姚波
杨秀梅
岳春歌
毛庆和
Liu Xiaobing;Wang Bin;Yao Bo;Yang Xiumei;Yue Chunge;Mao Qinghe(Institute of Physical Science and Information Technology,Anhui University,Hefei 230039,Anhui,China;Anhui Provincial Key Laboratory of Photonics Devices and Materials,Anhui Institute of Optical and Fine Mechanics,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,Anhui,China;School of Physical Science,University of Science and Technology of China,Hefei 230026,Anhui,China;Advanced Laser Technology Laboratory of Anhui Province,Hefei 230037,Anhui,China;School of Environmental Science and Optoelectronic Technology,University of Science and Technology of China,Hefei 230026,Anhui,China)
出处
《中国激光》
EI
CAS
CSCD
北大核心
2023年第23期121-129,共9页
Chinese Journal of Lasers
基金
科技创新2030“量子通信与量子计算机”重大项目(1-2)
中国科学院B类战略性先导科技专项(XDB21010300)。
关键词
激光器
光纤激光器
分布Bragg反射
PDH稳频
超稳腔
温度控制
lasers
fiber laser
distributed Bragg reflection
PDH frequency stabilization
ultrastable optical cavity
temperature control
