Properties of Length-Apodized Phase-Shifted LPGs Operating at the Phase Matching Turning Point

Author

James, Stephen W. ; Topliss, Stephen M. ; Tatam, Ralph P.

Author_Institution

Dept. of Eng. Photonics, Cranfield Univ., Cranfield, UK

Volume

30

Issue

13

fYear

2012

fDate

7/1/2012 12:00:00 AM

Firstpage

2203

Lastpage

2209

Abstract

The characteristics of length-apodized phase-shifted fiber optic long period gratings with full and partial nanostructured coatings have been explored theoretically and experimentally. The twin rejection bands that are characteristic of length-apodized phase-shifted long period gratings are studied for a long period grating (LPG) operating at the phase matching turning point. When one half of the length of the LPG is coated, complex bandgap like structure appears within the transmission spectrum, which may be of benefit to spectral filter design and for sensing applications.

Keywords

diffraction gratings; energy gap; nanophotonics; optical fibres; optical films; optical filters; optical phase matching; complex bandgap; fiber optic long period gratings; length apodized phase shifted LPG; nanostructured coatings; phase matching turning point; spectral filter design; transmission spectrum; twin rejection bands; Attenuation; Coatings; Couplings; Gratings; Optical frequency conversion; Turning; Nanoscale coatings; optical fiber long period gratings; optical filter;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2012.2195473

Filename

6189018