Chirped Bragg grating Fabry-Perot interferometer for nanostrain measurement

R. M. Silva; M. S. Ferreira; O. Frazão

doi:10.1117/12.892520

26 July 2011 Chirped Bragg grating Fabry-Perot interferometer for nanostrain measurement

R. M. Silva, M. S. Ferreira, O. Frazão

Proceedings Volume 8001, International Conference on Applications of Optics and Photonics; 800149 (2011) https://doi.org/10.1117/12.892520
Event: International Conference on Applications of Optics and Photonics, 2011, Braga, Portugal

Abstract

In this work, a simple real-static nanostrain sensor based on a Bragg grating structure is presented. The setup is constituted by a narrow linewidth laser as light source, an optical circulator and a photodetector. The sensing head is formed by a chirped Bragg grating inscribed in a standard single mode fiber (SMF-28) by the phase technique. The fiber face end is cleaved and coated with a silver mirror, obtaining a Fabry-Perot interferometer. It is observable that the fringes period increases along the grating, due to the chirp spectrum (0.4 nm/cm) characteristics. The laser is fixed in one slope region of the fringe pattern. When strain is applied, the optical power changes linearly. A sensitivity of 5.72 μW/με in a range of 2 με . The sensing head resolution is 70 nε for a measurement step of 875 nε.

Citation Download Citation

R. M. Silva, M. S. Ferreira, and O. Frazão "Chirped Bragg grating Fabry-Perot interferometer for nanostrain measurement", Proc. SPIE 8001, International Conference on Applications of Optics and Photonics, 800149 (26 July 2011); https://doi.org/10.1117/12.892520

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Fiber Bragg gratings

Head

Interferometers

Fringe analysis

Laser optics

Fabry–Perot interferometry

Sensors

Show All Keywords

Keywords/Phrases

Search In:

Publication Years