激光技术
激光技術
격광기술
LASER TECHNOLOGY
2014年
6期
780-784
,共5页
阙如月%刘一%孙慧慧%曲士良
闕如月%劉一%孫慧慧%麯士良
궐여월%류일%손혜혜%곡사량
光学器件%光纤传感器%飞秒激光%法布里-珀罗干涉%折射率%含盐浓度
光學器件%光纖傳感器%飛秒激光%法佈裏-珀囉榦涉%摺射率%含鹽濃度
광학기건%광섬전감기%비초격광%법포리-박라간섭%절사솔%함염농도
optical devices%optical fiber sensor%femtosecond laser%F-P interferometer%refractive index%salinity
为了实现高灵敏度液体折射率传感器的高效制备，采用飞秒激光直写技术，在光纤末端刻蚀出矩形凹槽，辅以光纤熔接方法，制备出一种基于光纤内双开口法布里-珀罗（ F-P）干涉腔的折射率传感器。该传感器的液体折射率传感灵敏度达到1107．76nm／RIU。讨论了温度对该传感器性能的影响，温度串扰小于0．0025nm／℃；基于海水含盐浓度与折射率的线性关系，探讨了该传感器在海水含盐浓度传感测量方面的应用，灵敏度为0．171nm／（ mg · mL-1）。结果表明，基于光纤内双开口F-P干涉腔的折射率传感器具有干涉谱对比度高、线性响应良好、灵敏度高、不易受温度串扰、结构紧凑、制备简单高效等优点，在生物、医疗、化学、环境等领域中有着广泛的应用前景。
為瞭實現高靈敏度液體摺射率傳感器的高效製備，採用飛秒激光直寫技術，在光纖末耑刻蝕齣矩形凹槽，輔以光纖鎔接方法，製備齣一種基于光纖內雙開口法佈裏-珀囉（ F-P）榦涉腔的摺射率傳感器。該傳感器的液體摺射率傳感靈敏度達到1107．76nm／RIU。討論瞭溫度對該傳感器性能的影響，溫度串擾小于0．0025nm／℃；基于海水含鹽濃度與摺射率的線性關繫，探討瞭該傳感器在海水含鹽濃度傳感測量方麵的應用，靈敏度為0．171nm／（ mg · mL-1）。結果錶明，基于光纖內雙開口F-P榦涉腔的摺射率傳感器具有榦涉譜對比度高、線性響應良好、靈敏度高、不易受溫度串擾、結構緊湊、製備簡單高效等優點，在生物、醫療、化學、環境等領域中有著廣汎的應用前景。
위료실현고령민도액체절사솔전감기적고효제비，채용비초격광직사기술，재광섬말단각식출구형요조，보이광섬용접방법，제비출일충기우광섬내쌍개구법포리-박라（ F-P）간섭강적절사솔전감기。해전감기적액체절사솔전감령민도체도1107．76nm／RIU。토론료온도대해전감기성능적영향，온도천우소우0．0025nm／℃；기우해수함염농도여절사솔적선성관계，탐토료해전감기재해수함염농도전감측량방면적응용，령민도위0．171nm／（ mg · mL-1）。결과표명，기우광섬내쌍개구F-P간섭강적절사솔전감기구유간섭보대비도고、선성향응량호、령민도고、불역수온도천우、결구긴주、제비간단고효등우점，재생물、의료、화학、배경등영역중유착엄범적응용전경。
In order to achieve a high sensitive fiber sensor for liquid refractive index ( RI ) measurement through a simple and efficient method , a Fabry-Pérot interferometer ( F-PI) cavity in fiber with double-openings was fabricated by femtosecond laser micromachining followed by fiber fusion .Firstly a rectangular groove was ablated at the end of fiber by femtosecond laser direct writing .Then the fiber end with the groove was spliced with another fiber end to form the F -PI cavity with double-openings .The responses of the fiber sensor based on the F-PI cavity with double-openings to the liquid RI and temperature were investigated .The experiment results show that the sensitivity of the sensor for RI measurement can achieve 1107.76nm/RIU, and the crosstalk by temperature is less than 0.0025nm/℃.The application of the sensor for seawater salinity measurement was also discussed and its sensitivity achieves 0.171nm/(mg· mL-1).This liquid RI fiber sensor based on the F-PI cavity with double-openings can have great application in the fields of biology , medicine, chemistry and environment due to its advantages of high constrast of the reflection spectrum , linear response , high sensitivity, low crosstalk of temperature , small size and simple fabrication .
