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Optimization of Apodized Fiber Bragg Grating for Sensing Applications

International Conference on Electronics, Information and Communication Engineering
© 2011 by IJCA Journal
ICEICE - Number 3
Year of Publication: 2011
Sunita P. Ugale
V. Mishra

Sunita P Ugale and V Mishra. Article: Optimization of Apodized Fiber Bragg Grating for Sensing Applications. IJCA Special Issue on Electronics, Information and Communication Engineering ICEICE(3):8-11, December 2011. Full text available. BibTeX

	author = {Sunita P. Ugale and V. Mishra},
	title = {Article: Optimization of Apodized Fiber Bragg Grating for Sensing Applications},
	journal = {IJCA Special Issue on Electronics, Information and Communication Engineering},
	year = {2011},
	volume = {ICEICE},
	number = {3},
	pages = {8-11},
	month = {December},
	note = {Full text available}


This paper presents the modeling and characterization of an Apodized optical fiber Bragg grating for maximum reflectivity and minimum side lobe power wastage and narrow spectral response. The modeling is based upon coupled mode theory together with transfer matrix method. This matrix approach is effective at treating a single grating as a series of separate gratings each having reduced overall length and different pitch lengths, and describing each with its own T-matrix.

FBG sensors are based on the fact that Bragg wavelength changes with change in pitch of the grating and the change in refractive index. Thus, any physical parameter which cause change in above mentioned parameters can be sensed using FBG. In optical sensing, the broad spectral response can result in poor sensitivity. In order to improve and to some extent to tailor the spectral response of FBG length, refractive index change, apodization and FWHM is optimized based upon maximum reflectivity criteria.


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