基于边孔光纤的偏振可调的环形腔激光输出技术  

Polarization-Tunable Ring Cavity Laser Output Based on Side Hole Fiber

作　　者：余燚 余有龙[1] 王培明 周秦至 余千春 Yu Yi;Yu Youlong;Wang Peiming;Zhou Qinzhi;Yu Qianchun(Anhui Provincial Key Laboratory of Measurement Theory and Precision Instruments,School of Instrument Science and Optoelectronic Engineering,Hefei University of Technology,Hefei 230009,Anhui,China)

机构地区：[1]合肥工业大学仪器科学与光电工程学院,测量理论与精密仪器安徽省重点实验室,安徽合肥230009

出　　处：《中国激光》2025年第2期163-169,共7页Chinese Journal of Lasers

基　　金：国家自然科学基金(62073116)。

摘　　要：实际应用中往往对激光的偏振态有一定的要求。为了实现不同偏振态的激光输出,基于边孔光纤(SHF)搭建了全光纤环形腔激光输出装置。通过扭转内嵌于腔内的SHF,实现了对输出激光椭圆度和方位角的调节,并探讨了其应用于传感领域的可行性。实验结果表明:当扭转角为0°~180°时,输出激光椭圆度的最大调节范围为0.02~0.48,方位角的最大调节范围为-93°~2°;若扭转角为0°时入射线偏振光的偏振方向与SHF主轴夹角为45°,则椭圆度的调节范围可增至0.02~0.91。将偏振可调激光输出装置用于扭转角度传感,当扭转角度测量范围为5°~97°时,扭转角的传感灵敏度为-1.0757。该设计结构简单、易操控,为激光偏振态的调节以及基于偏振的传感测量提供了新思路。Objective Fiber lasers have provided many advantages over other lasers since their inception.In terms of structure,the optical fiber has a large surface-area-to-volume ratio;therefore,there is usually no need to add a large heat dissipation device,making the fiber laser more compact.This provides significant advantages over traditional solid-state lasers.In addition,fiber lasers are less sensitive to microscopic contaminants and exhibit excellent optical transmission characteristics.In terms of optical transmission,as excellent optical waveguide devices,optical fibers can effectively constrain light beams without the need for cumbersome alignment procedures,thus greatly simplifying actual operations.Practical applications often have certain requirements for the polarization of light,and the laser output is usually natural or linearly polarized light.Therefore,adjustment of the polarization state of the laser output has attracted much attention.Among the currently reported methods for controlling the laser polarization state,adjustment based on linear cavity structures is prone to standing waves and hole-burning phenomena,thereby affecting the gain,whereas special optical devices(such as liquid-crystal light valves,metasurface materials,and semi-circular materials)are used outside the cavity.Wave plates regulate the polarization state of the output.Although their flexibility is high,the beam quality is low.In addition,the devices in the adjustment optical path are connected through a spatial optical path,which requires high collimation of the system.Therefore,this study reports a new all-fiber ring-cavity laser output device that introduces a side-hole fiber(SHF)into the cavity to obtain laser output in different polarization states by twisting the SHF.The proposed structure is simple and easy to operate and provides new ideas for polarization-based sensing and measurement technology.Methods In this study,the ellipticity and azimuth angle were used to characterize the polarization state of the laser.First,the pola

关 键 词：环形腔激光输出 偏振调控 扭转 边孔光纤 

分 类 号：TN247[电子电信—物理电子学]