Temperature sensitivity of a long-period waveguide grating in a channel waveguide

2005 ◽  
Vol 86 (24) ◽  
pp. 241115 ◽  
Author(s):  
Qing Liu ◽  
K. S. Chiang ◽  
K. P. Lor ◽  
C. K. Chow
Keyword(s):  
Temperature Sensitivity ◽  
Channel Waveguide ◽  
Waveguide Grating ◽  
Long Period

High temperature-sensitivity sensor based on long period fiber grating inscribed with femtosecond laser transversal-scanning method

2017 ◽  
Vol 15 (9) ◽  
pp. 090602 ◽  
Author(s):  
Xinran Dong Xinran Dong ◽  
Zheng Xie Zheng Xie ◽  
Yuxin Song Yuxin Song ◽  
Kai Yin Kai Yin ◽  
Dongkai Chu Dongkai Chu ◽  
...  
Keyword(s):  
High Temperature ◽  
Femtosecond Laser ◽  
Temperature Sensitivity ◽  
Fiber Grating ◽  
Scanning Method ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Period Fiber Grating ◽  
High Temperature Sensitivity

Design of Tunable Long-period Waveguide Grating Coupler Based on LiNbO3

2017 ◽  
Vol 46 (3) ◽  
pp. 323002
Author(s):  
李青青 LI Qing-qing ◽  
张爱玲 ZHANG Ai-ling ◽  
田红苗 TIAN Hong-miao ◽  
王钊 WANG Zhao
Keyword(s):  
Grating Coupler ◽  
Waveguide Grating ◽  
Long Period

scholarly journals Sensitivity Characterization of Cascaded Long-Period Gratings Operating near the Phase-Matching Turning Point

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 5978
Author(s):  
Wei Zhou ◽  
Yanli Ran ◽  
Zhijun Yan ◽  
Qizhen Sun ◽  
Chen Liu ◽  
...  
Keyword(s):  
Refractive Index ◽  
Temperature Sensitivity ◽  
Turning Point ◽  
Phase Matching ◽  
Long Period ◽  
Long Period Gratings ◽  
High Measurement ◽  
Surrounding Refractive Index ◽  
Wavelength Resolution ◽  
Quality Factor Q

We characterized a cascaded long-period gratings (LPGs)-based sensor that was operating at the phase-matching turning point (PMTP). The cascaded LPGs constructed an in-fiber Mach–Zehnder interferometer (MZI), which exhibited a series of high-quality-factor (Q) narrow-bandwidth resonance peaks. As the LPG operated at the PMTP, the proposed sensor showed an ultrahigh refractive index (RI) and temperature sensitivity, and high measurement precision. In this study, we took an in-depth look at the effects of grating separation on Q-factor and sensitivity. The results showed that the sensitivity to the surrounding refractive index (SRI) reached 4741.5 nm/RIU at 1.4255 and 2138 nm/RIU, over the range of 1.335–1.373. In addition, the temperature sensitivity was around 4.84 nm/°C. With a 0.02 nm wavelength resolution, the RI and temperature sensing limits were 9.3 × 10−6 RIU and 5.5 × 10−3 °C.

UV-written long-period waveguide grating coupler

2008 ◽  
Author(s):  
C. K. Chow ◽  
K. S. Chiang ◽  
Q. Liu ◽  
K. P. Lor ◽  
H. P. Chan
Keyword(s):  
Grating Coupler ◽  
Waveguide Grating ◽  
Long Period
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