Effective refractive index modulation based optical fiber humidity sensor employing etched fiber Bragg grating

2015 ◽  
Author(s):  
Pathi Mundendhar ◽  
Sunil K. Khijwania
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Fiber Bragg Grating ◽  
Effective Refractive Index ◽  
Humidity Sensor ◽  
Bragg Grating ◽  
Refractive Index Modulation ◽  
Index Modulation

scholarly journals Quantitative investigation of the refractive-index modulation within the core of a fiber Bragg grating

2006 ◽  
Vol 14 (22) ◽  
pp. 10332 ◽  
Author(s):  
Betty P. Kouskousis ◽  
Claire M. Rollinson ◽  
Daniel J. Kitcher ◽  
Stephen F. Collins ◽  
Greg W. Baxter ◽  
...  
Keyword(s):  
Refractive Index ◽  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Refractive Index Modulation ◽  
Quantitative Investigation ◽  
The Core ◽  
Index Modulation

Development of an Optical Fiber Sensor with a D-shaped Fiber Bragg Grating Integrated in a Loop-mirror Optical Fiber Laser as a High Sensitivity Refractometer

2021 ◽  
Vol 32 ◽  
Author(s):  
Binh Pham Thanh ◽  
Thuy Van Nguyen ◽  
Van Hoi Pham ◽  
Huy Bui ◽  
Thi Hong Cam Hoang ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Fiber Laser ◽  
Fiber Bragg Grating ◽  
Limit Of Detection ◽  
Optical Fiber Sensor ◽  
High Sensitivity ◽  
Optical Signal ◽  
Bragg Grating ◽  
Loop Mirror

In this paper, we report a new type of refractometer based on a D-shaped fiber Bragg grating (FBG) integrated in a loop-mirror optical fiber laser. This proposed sensor is used in wavelength interrogation method, in which the D-shaped FBG is applied as a refractive index (RI) sensing probe and a mirror to select mode of laser. The D-shaped FBG is prepared by the removal of a portion of the fiber cladding covering the FBG by means of side-polishing technique. The D-shaped FBG sensing probe integrated in a loop-mirror optical fiber laser with saturated pump technique, the characteristics of sensing signals have been improved to obtain stable intensity, narrower bandwidth and higher optical signal-to-noise ratio compare to normal reflection configuration. The limit of detection (LOD) of this sensor can be achieved to 2.95 x 10-4 RIU in the refractive index (RI) range of 1.42-1.44. Accordingly, we believe that the proposed refractometer has a huge potential for applications in biochemical-sensing technique.

A Humidity Sensor Based on Ultra-Long-Period Fiber Gratings with Asymmetric Refractive Index Modulation

2009 ◽  
Vol 36 (8) ◽  
pp. 2042-2045 ◽  
Author(s):  
宋韵 Song Yun ◽  
朱涛 Zhu Tao ◽  
饶云江 Rao Yunjiang ◽  
赵英伟 Zhao Yingwei
Keyword(s):  
Refractive Index ◽  
Humidity Sensor ◽  
Refractive Index Modulation ◽  
Fiber Gratings ◽  
Long Period ◽  
Long Period Fiber Gratings ◽  
Index Modulation

scholarly journals Temperature insensitive hysteresis free highly sensitive polymer optical fiber Bragg grating humidity sensor

2016 ◽  
Vol 24 (2) ◽  
pp. 1206 ◽  
Author(s):  
Getinet Woyessa ◽  
Kristian Nielsen ◽  
Alessio Stefani ◽  
Christos Markos ◽  
Ole Bang
Keyword(s):  
Optical Fiber ◽  
Fiber Bragg Grating ◽  
Humidity Sensor ◽  
Bragg Grating ◽  
Polymer Optical Fiber ◽  
Highly Sensitive ◽  
Optical Fiber Bragg Grating

scholarly journals Tilted Fiber Bragg Grating photowritten in microstructured optical fiber for improved refractive index measurement

2006 ◽  
Vol 14 (22) ◽  
pp. 10359 ◽  
Author(s):  
Minh Châu Phan Huy ◽  
Guillaume Laffont ◽  
Véronique Dewynter ◽  
Pierre Ferdinand ◽  
Laurent Labonté ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Refractive Index Measurement ◽  
Microstructured Optical Fiber ◽  
Index Measurement
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