Strain-induced thermally tuned long-period fiber gratings fabricated on a periodically corrugated substrate

Author

Lin, Chien-Hung ; Li, Qun ; Au, Amy A. ; Jiang, Yan ; Wu, Enboa ; Lee, Henry P.

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Univ. of California, Irvine, CA, USA

Volume

22

Issue

7

fYear

2004

fDate

7/1/2004 12:00:00 AM

Firstpage

1818

Lastpage

1827

Abstract

This paper reports the characteristics of a strain-induced thermally controlled loss-tunable long-period fiber grating (LPFG) fabricated on a prepatterned corrugated substrate. Periodic microbending at the fiber-substrate interface induces mode coupling between the core and asymmetrical cladding modes that yields narrow-band attenuation as large as -25 dB. Several parameters that affect the performance of the tunable LPFG, such as the diameter of the etched fiber, number of grating periods, curing condition, and thermal expansion properties of the bonding materials, are investigated. This paper also demonstrates the integration of an on-chip thin-film microheater that also functions as a temperature sensor for the LPFG.

Keywords

diffraction gratings; etching; optical communication equipment; optical fibre fabrication; optical fibre losses; optical tuning; temperature sensors; thermal expansion; fiber etching; fiber-substrate interface; long-period fiber gratings; microbending; mode coupling; narrow-band attenuation; on-chip thin-film microheater; optical fiber fabrication; periodically corrugated substrate; strain-induced thermal tuning; temperature sensor; thermal expansion; Attenuation; Bonding; Curing; Etching; Fiber gratings; Narrowband; Optical fiber sensors; Strain control; Substrates; Thermal expansion; LPFGs; Long-period fiber gratings; strain-induced long-period fiber grating; thermally tuned long-period fiber grating;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2004.831153

Filename

1310433