Long period grating inscribed by femtosecond laser for refractive index measurements in aqueous environments

被引：0

作者：

Melo, Luis Brito ^{[1
]}

Ahmed, Farid ^{[1
]}

Jun, Martin ^{[1
]}

Wild, Peter ^{[1
]}

机构：

[1] Univ Victoria, Dept Mech Engn, Victoria, BC V8W 3P6, Canada

来源：

22ND INTERNATIONAL CONFERENCE ON OPTICAL FIBER SENSORS, PTS 1-3 | 2012年 / 8421卷

关键词：

Long period gratings; refractive index measurements; femtosecond laser; high sensitivity; FIBER GRATINGS; SENSITIVITY; FABRICATION; SENSORS; FILTERS; PULSES;

D O I：

10.1117/12.970268

中图分类号：

TP7 [遥感技术];

学科分类号：

081102 ; 0816 ; 081602 ; 083002 ; 1404 ;

摘要：

A sensor based on a Long Period Grating (LPG) for measurement of the refractive index (RI) of liquids with RI close to that of water is reported. An LPG was written by a femtosecond laser (F-LPG) operating at 800nm, utilizing a point-by-point technique. The performance of the F-LPG is compared with an LPG written by ultraviolet irradiation (UV-LPG). For low RIs, the sensitivities of the F-LPG and UV-LPG are 130 nm/RIU and 3.1 nm/RIU, respectively. For higher RI, the F-LPG exhibited sensitivity as high as 249 nm/RIU. For the low range of RI, the resolution of F-LPG was 3.8 x 10(-5).

引用

页数：4

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