A simple and cost-effective metal coating method for reflective long period grating sensors

Sohel Rana; Bahareh Badamchi; Harish Subbaraman; Nirmala Kandadai

doi:10.1117/12.2568162

22 August 2020 A simple and cost-effective metal coating method for reflective long period grating sensors

Sohel Rana, Bahareh Badamchi, Harish Subbaraman, Nirmala Kandadai

Proceedings Volume 11503, Infrared Sensors, Devices, and Applications X; 115030K (2020) https://doi.org/10.1117/12.2568162
Event: SPIE Optical Engineering + Applications, 2020, Online Only

Abstract

A novel and cost-effective technique to coat a fiber optic long period grating (LPG) sensor with silver paste to realize a reflection mode operation is presented here. LPGs have higher sensitivity compared to fiber Bragg grating (FBG) and are typically used as a transmission sensor. Recently, reflective LPG structures have been realized by coating the end of the LPG fiber with metal, but they have limitations as the fabrication process to coat the fiber with metal is either expensive or complex. In our work, we show a novel inexpensive technique to coat long lengths (60 cm or longer) of LPG with silver. The fabricated reflective LPG mimics the transmitted spectrum with improved selectivity. This simple coating method can be applied for other optical fiber sensors; such as metal embedded sensors for monitoring parameters at such critical locations not accessible to ordinary sensors.

Conference Presentation

Citation Download Citation

Sohel Rana, Bahareh Badamchi, Harish Subbaraman, and Nirmala Kandadai "A simple and cost-effective metal coating method for reflective long period grating sensors", Proc. SPIE 11503, Infrared Sensors, Devices, and Applications X, 115030K (22 August 2020); https://doi.org/10.1117/12.2568162

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