Abstract

Fiber Bragg Gratings have been shown to have a much improved thermal sensitivity when coated by Polymethyle methacrylate (PMMA) at cryogenic regime has been proposed. The PMMA has large thermal expansion coefficients and acts as driving elements. It is coated on the FBG at room temperature and the FBG is under compression at lower temperatures. This allows a much wider tuning of Bragg grating as fiber can stand at more compression than tension. An overall sensitivity of 0.039nm/K in the 1550nm wavelength regime has been achieved and the Bragg wavelength has been tuned upto 8.97nm in the temperature range 77K to 303K.

© 2011 Optical Society of America

PDF Article
More Like This
An FBG Sensor for Strain and Temperature Discrimination at Cryogenic Regime

D. Sengupta, M. Sai Shankar, P. Kishore, P. Saidi Reddy, R. L. N Sai Prasad, P. Vengal Rao, and K. Srimannarayana
831106 Asia Communications and Photonics Conference and Exhibition (ACP) 2011

Experimental Study on Humidity Sensing Using a FBG Sensor with Polyimide Coating

Fuxin Ding, Lutang Wang, Nian Fang, and Zhaoming Huang
79900C Asia Communications and Photonics Conference and Exhibition (ACP) 2010

Temperature Compensated Liquid Level Sensor using FBGs and a Bourdon tube

D. Sengupta, M. Sai Shankar, P. Vengal Rao, P. Saidi Reddy, R. L. N Sai Prasad, P. Kishore, and K. Srimannarayana
83110R Asia Communications and Photonics Conference and Exhibition (ACP) 2011

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription