Widely tunable mid-infrared fiber-feedback optical parametric oscillator  

作　　者：TINGTING YU JIANAN FANG KUN HUANG HEPING ZENG 

机构地区：[1]State Key Laboratory of Precision Spectroscopy,East China Normal University,Shanghai 200062,China [2]Chongqing Key Laboratory of Precision Optics,Chongqing Institute of East China Normal University,Chongqing 401121,China [3]Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China [4]Chongqing Institute for Brain and Intelligence,Guangyang Bay Laboratory,Chongqing 400064,China [5]Shanghai Research Center for Quantum Sciences,Shanghai 201315,China

出　　处：《Photonics Research》2024年第10期2123-2129,共7页光子学研究（英文版）

基　　金：National Natural Science Foundation of China(62035005,62175064,62235019);Shanghai Pilot Program for Basic Research(TQ20220104);Natural Science Foundation of Chongqing Municipality(CSTB2022NSCQMSX0451,CSTB2022TIAD-DEX0036,CSTB2023NSCQJQX0011);Shanghai Municipal Science and Technology Major Project(2019SHZDZX01);Fundamental Research Funds for the Central Universities。

摘　　要：Synchronously pumped optical parametric oscillators(OPOs)provide uniquely versatile platforms to generate ultrafast mid-infrared pulses within a spectral range beyond the access of conventional mode-locked lasers.However,conventional OPO sources based on bulk crystals have been plagued by complex optical alignment and large physical footprint.Here,we devise and implement two OPO variants based on a polarizationmaintaining fiber-feedback cavity,which allow to robustly deliver sub-picosecond MIR pulses without the need of active stabilization.The first one integrates an erbium-doped fiber into the OPO cavity as the additional gain medium,which significantly reduces the pump threshold and allows stable optical pulse formation within a spectral range of 1553–1586 nm.The second one adopts a chirped poling nonlinear crystal in a passive-fiber cavity to further extend the operation spectral coverage,which facilitates broad tuning ranges of 1350–1768 nm and 2450–4450 nm for the signal and idler bands,respectively.Therefore,the presented mid-infrared OPO source is featured with high compactness,robust operation,and wide tunability,which would be attractive for subsequent applications such as infrared photonics,biomedical examination,and molecular spectroscopy.

关 键 词：FIBER TUNABLE POLARIZATION 

分 类 号：TN752[电子电信—电路与系统] TN253