Sampled chirped fiber gratings as distributed pressure sensors

Swee Chuan Tjin; Lipi Mohanty; Nam Quoc Ngo

doi:10.1117/12.545209

1 September 2004 Sampled chirped fiber gratings as distributed pressure sensors

Swee Chuan Tjin, Lipi Mohanty, Nam Quoc Ngo

Proceedings Volume 5459, Optical Sensing; (2004) https://doi.org/10.1117/12.545209
Event: Photonics Europe, 2004, Strasbourg, France

Abstract

Fiber gratings have been studied for their applications in sensing and communications. Many sensing applications of the uniform fiber Bragg grating, chirped fiber grating and long period grating have been studied, proposed and commercialized. Sampled chirped gratings have been studied for multichannel dispersion compensation in DWDM systems. In this paper, we show that the sampled chirped fiber grating can be used as a distributed pressure sensor. The chirp provides ease of manufacture of many gratings. The sampling results in many small, uniform grating-like structures. This fact can be used to simulate a distributed sensor over the length of the sampled chirped grating. When a surface comes into contact with the sensor, the distribution of the pressure determines the shift in central wavelength of the various sub-gratings. The sub-grating that experiences the maximum pressure will show maximum wavelength shift whereas adjacent sub-gratings will show less shift. This can also give the location of the pressure. The sensor design comprises of a sampled chirped grating embedded in unidirectional fiber-reinforced composite prepreg. The prepreg enhances the mechanical strength and the unidirectional embedding reduces birefringence. The number of layers in the prepreg stack varies the sensitivity. Such distributed pressure sensors can be applied in robotics, ergonomics, and in the biomedical field.

Citation Download Citation

Swee Chuan Tjin, Lipi Mohanty, and Nam Quoc Ngo "Sampled chirped fiber gratings as distributed pressure sensors", Proc. SPIE 5459, Optical Sensing, (1 September 2004); https://doi.org/10.1117/12.545209

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
8 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Sensors

Fiber Bragg gratings

Composites

Fiber optics sensors

Optical design

Ultraviolet radiation

Birefringence

Show All Keywords

Keywords/Phrases

Search In:

Publication Years