摘要
Side polished fiber(SPF)has a controllable average roughness and length of the side-polishing region,which becomes a versatile platform for integrating multiple materials to interact with the evanescent field to fabricate all-fiber devices and sensors.It has been widely used in couplers,filters,polarizers,optical attenuators,photodetectors,modulators,and sensors for temperature,humidity,strain,biological molecules,chemical gas,and vector magnetic monitoring.In this article,an overview of the development history,fabrication techniques,fiber types,transmission characteristics,and varied recent applications of SPFs are reviewed.Firstly,the fabrication techniques of SPFs are reviewed,including the V-groove assisted polishing technique and wheel polishing technique.Then,the different types of SPFs and their characteristics are discussed.Finally,various applications of SPFs are discussed and concluded theoretically and experimentally,including their principles and structures.When designing the device,the residual thickness and polishing lengths of the SPF need to be appropriately selected in order to obtain the best performance.Developing all-fiber devices and sensors is aimed at practical usability under harsh environments and allows to avoid the high coupling loss between optical fibers and on-chip integrated devices.
基金
supported by the National Natural Science Foundation of China(Grant Nos.12174155,61705086,61675092,and 62075088)
National Key Research and Development Program of China(Grant Nos.2021YFB2800801 and 2018YFB1801900)
Natural Science Foundation of Guangdong Province for Distinguished Young Scholar(Grant No.2020B1515020024)
Natural Science Foundation of Guangdong Province(Grant Nos.2017A030313375and 2019A1515011380)
Key-Area Research and Development Program of Guangdong Province(Grant No.2019B010138004)
Project of Guangzhou Industry Leading Talents(Grant No.CXLJTD-201607)
Aeronautical Science Foundation of China(Grant Nos.201708W4001 and 201808W4001)
Project of STRPAT of EC Laboratory(Grant No.ZHD201902)
TESTBED2(Grant No.H2020-MSCA-RISE-2019)
Jinan Outstanding Young Scholar Support Program(Grant Nos.JNSBYC-2020040 and JNSBYC-2020117).
