调制光栅Y分支型激光器高效调谐特性研究  

Efficient Tuning Characteristics of Modulated Grating Y⁃Branch Lasers

作　　者：黄怿[1] 尤越 张浩森 邓传鲁[1] 胡程勇 汪立森 张小贝[1] 王廷云[1] Huang Yi;You Yue;Zhang Haosen;Deng Chuanlu;Hu Chengyong;Wang Lisen;Zhang Xiaobei;Wang Tingyun(Key Laboratory of Specialty Fiber Optics and Optical Access Networks,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学特种光纤与光接入网重点实验室,上海200444

出　　处：《中国激光》2024年第2期1-9,共9页Chinese Journal of Lasers

基　　金：国家自然科学基金(61875116,62027818);上海市自然科学基金(22ZR1423000,22010500100)。

摘　　要：针对调制光栅Y分支型(MG-Y)激光器在实际应用中波长-电流查找表(LUT)构建效率低、调谐方式复杂、波长调谐时功率漂移量大等问题,对其调谐特性进行了深入研究。利用左、右反射器电流的调谐特性,设计出一种具有普适性的波长测试框架,能够高效且准确地定位激光器的平滑波长调谐路径。同时提出一种自适应功率校准算法,提升了激光器在波长调谐时的功率稳定性。测试结果表明:基于波长测试框架的LUT仅包含3147个反射器电流-波长组合;激光器的波长调谐范围为1528~1568 nm,波长调谐步长为5 pm;边模抑制比(SMSR)大于40 dB;波长准确度优于±2.9 pm;波长重复性优于1.9 pm;波长调谐时功率漂移量小于0.408 mW,稳定度为3.57%;解调出光纤非本征法布里-珀罗干涉型(EFPI)传感器的腔长变化量小于7.58 nm,可以应用于光纤传感等实际场景。Objective Because of their advantages of small size,light weight,and long lifespan,tunable semiconductor lasers have broad application prospects in the fields of coherent optical communication,fiber optical sensing,and gas sensing.In recent years,extensive research on laser-tuning methods has been conducted for various application scenarios.Modulated grating Y-branch(MG-Y)lasers have been widely studied owing to their wide tuning range,fast tuning speed,and high flexibility.To achieve the wavelengthtuning function of the MG-Y laser in practical applications,a wavelength-current look-up table(LUT)must be developed.A common method of constructing an LUT is to scan the reflector currents,which is inefficient.In this method,the LUT contains a large number of invalid wavelength data points.This is not conducive to regular calibration and makes it difficult to ensure wavelength accuracy.The wavelength-tuning characteristics of the MG-Y laser were investigated,and the tuning method was optimized to address the issues of low efficiency in constructing the wavelength-current LUT,the complexity of wavelength-tuning methods,and the large power drift during the wavelength tuning of the MG-Y laser.Methods First,the current characteristics of an MG-Y laser are analyzed.According to the principle of the additive Vernier effect of the MG-Y laser,adjusting the reflector currents can control the position of the comb reflection spectrum and realize a wavelengthcoarse tuning function.Second,a universal wavelength testing framework is designed by utilizing the tuning characteristics of the left and right reflector currents and the principle of the orthogonal experiment.Third,a wavelength-tuning method based on a wavelength test framework is developed.All smooth wavelength-tuning paths can be obtained by scanning the reflector currents along the grid lines of the test framework.A wavelength-tuning range of 40 nm can be obtained by scanning the reflector currents along all smooth paths.A fine wavelength-tuning function is realized usin

关 键 词：激光器 半导体激光器 波长调谐 功率校准 光纤传感 

分 类 号：TN248.4[电子电信—物理电子学]