Low-cost and high-resolution interrogation scheme for LPG-based temperature sensor

Venkata Reddy M.; Srimannarayana K.; Venkatappa Rao T.; Vengal Rao P.

doi:10.1117/12.2188184

23 September 2015 Low-cost and high-resolution interrogation scheme for LPG-based temperature sensor

Venkata Reddy M., Srimannarayana K., Venkatappa Rao T., Vengal Rao P.

Proceedings Volume 9577, Optical Modeling and Performance Predictions VII; 95770L (2015) https://doi.org/10.1117/12.2188184
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

Abstract

A low-cost and high-resolution interrogation scheme for a long-period fiber grating (LPG) temperature sensor with adjustable temperature range has been designed, developed and tested. In general LPGs are widely used as optical sensors and can be used as optical edge filters to interrogate the wavelength encoded signal from sensors such as fiber Bragg grating (FBG) by converting it into intensity modulated signal. But the interrogation of LPG sensors using FBG is a bit novel and it is to be studied experimentally. The sensor works based on measurement of shift in attenuation band of LPG corresponding to the applied temperature. The wavelength shift of LPG attenuation band is monitored using an optical spectrum analyser (OSA). Further the bulk and expensive OSA is replaced with a low-cost interrogation system that employ an FBG, photodiode and a transimpedance amplifier (TIA). The designed interrogation scheme makes the system low-cost, fast in response, and also enhances its resolution up to 0.1°C. The measurable temperature range using the proposed scheme is limited to 120 °C. However this range can be shifted within 15-450 °C by means of adjusting the Bragg wavelength of FBG.

Citation Download Citation

Venkata Reddy M., Srimannarayana K., Venkatappa Rao T., and Vengal Rao P. "Low-cost and high-resolution interrogation scheme for LPG-based temperature sensor", Proc. SPIE 9577, Optical Modeling and Performance Predictions VII, 95770L (23 September 2015); https://doi.org/10.1117/12.2188184

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available