光频梳精密测量543 nm稳频He-Ne激光波长方法研究  

Precise Wavelength Measurement of 543⁃nm Frequency Stabilized He⁃Ne Laser Using Optical Frequency Comb

作　　者：俞秋叶 王建波[2] 殷聪[2] 毕文文 雷李华[3] 张宝武 孔明 Yu Qiuye;Wang Jianbo;Yin Cong;Bi Wenwen;Lei Lihua;Zhang Baowu;Kong Ming(College of Metrology&Measurement Engineering,China Jiliang University,Hangzhou 310018,Zhejiang,China;National Institute of Metrology,Beijing 100029,China;Shanghai Institute of Measurement and Testing Technology,Shanghai 201203,China)

机构地区：[1]中国计量大学计量测试工程学院,浙江杭州310018 [2]中国计量科学研究院,北京100029 [3]上海市计量测试技术研究院,上海201203

出　　处：《中国激光》2024年第13期87-94,共8页Chinese Journal of Lasers

基　　金：国家重点研发计划(2021YFF0603300);国家自然科学基金(62075165)。

摘　　要：报道了一种利用光频梳精密测量543 nm He-Ne激光波长的实验方法,该方法采用偏频锁定技术将1086 nm连续分布式反馈光纤激光器锁定至光学频率梳,然后通过非线性光学晶体周期性极化铌酸锂(PPLN)倍频产生高稳定的543 nm连续激光。以倍频产生的543 nm激光作为参考标准光源,通过光学拍频方式实现被测543 nm热稳频He-Ne激光器波长的精确测量。实验结果表明,分布式反馈光纤激光器与光频梳锁定后3 h内的频率波动极差为0.2 MHz,且能长时间保持可靠的锁定状态。被测543 nm热稳频He-Ne激光器的频率抖动极差为1.3 MHz,标准差为0.2 MHz,1 s和1000 s的频率稳定度分别为2.1×10^(-10)和1.1×10^(-10),波长复现性为0.2 MHz,该方法的测量结果与利用碘稳频543 nm He-Ne激光拍频测量的数据等效。将1086 nm激光与光频梳连接,再通过倍频方式实现低功率543 nm He-Ne稳频激光波长的测量,该方法能够直接实现激光波长测量向时间频率基准的溯源,有效保证了测量结果的准确性。Objective The precise wavelength measurement of a 543-nm He-Ne laser traditionally relies on iodine-stabilized 543-nm He-Ne laser as the wavelength reference source,which is used to measure the thermally stabilized 543-nm He-Ne laser wavelength via beat frequency beating method.Usually,thermally stabilized 543-nm He-Ne laser employs as a secondary laser wavelength standard,which is widely used in precise measurement.Furthermore,iodine-stabilized 543-nm He-Ne laser is the internationally recommended standard laser frequency reference with its relative standard uncertainty of 4.5×10^(-11).The iodine-stabilized 543-nm He-Ne laser utilizes the intracavity saturation absorption frequency stabilization method,requiring the insertion of the iodine cell into the laser resonant cavity.However,the gain of the Ne atom at 543 nm is notably low,approximately 1%of that at 633 nm.Consequently,the output power of the single longitudinal mode is limited,reaching only approximately 50μW.Influences,such as mechanical drift,device aging,and other factors,can lead to detuning of the laser resonator cavity,and mismatches with the iodine cell.Hence,prolonged absence in light might be experienced by the 543-nm iodine-stabilized laser,compromising its utility as a laser wavelength reference.Thus,the development of a new wavelength measurement method for the 543-nm He-Ne laser is deemed essential.Methods In this study,a new method for accurately measuring the wavelength of the 543-nm He-Ne laser with an optical frequency comb is reported.This method employs offset locking technology to lock the 1086-nm distributed feedback single frequency fiber laser to the optical frequency comb.A frequency-stabilized 543-nm laser is generated by the nonlinear crystal PPLN via a frequency doubling process.The beat notes,detected via the generated CW 543 nm laser and measured 543-nm thermally stabilized He-Ne laser,can achieve accurate wavelength measurement of the measured laser.Results and Discussions The innovative approach for accurately measuring

关 键 词：测量 计量学 激光稳频 光学频率梳 543 nm He-Ne稳频激光 光波长测量 偏频锁定 

分 类 号：TB96[机械工程—光学工程] TB939[一般工业技术—计量学]