Table of Contents
Journal of Photonics
Volume 2013, Article ID 415059, 4 pages
Research Article

Tunable Optical Filter Based on Mechanically Induced Cascaded Long Period Optical Fiber Grating

Electronics Engineering Department, S. V. National Institute of Technology, Ichchhanath, Surat, Gujarat 395007, India

Received 28 March 2013; Revised 30 May 2013; Accepted 31 May 2013

Academic Editor: Baldemar Ibarra-Escamilla

Copyright © 2013 Sunita P. Ugale and Vivekanand Mishra. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We have proposed and demonstrated experimentally a novel and simple tunable optical filter based on mechanically induced and cascaded long period optical fiber gratings. In this filter variable FWHM and center wavelength is provided by cascading long period and ultralong period optical fiber gratings with different periods in a novel fiber structure. We report here for the first time to our knowledge the characterization of mechanically induced long period fiber gratings with periods up to several millimeters in novel multimode-single-mode-multimode fiber structure. We have obtained maximum loss peak of around 20 dB.