Spectral shape tunable band-rejection filter using a long-period fiber grating with divided coil heaters

Author

Bae, Jun Kye ; Kim, Sang Hyuck ; Kim, Jun Hee ; Bae, Jinho ; Lee, Sang Bae ; Jeong, Je-Myung

Author_Institution

Photonics Res. Center, Korea Inst. of Sci. & Technol., Seoul, South Korea

Volume

15

Issue

3

fYear

2003

fDate

3/1/2003 12:00:00 AM

Firstpage

407

Lastpage

409

Abstract

We have developed a new type of tunable band rejection filter, which provides high spectral-shaping flexibility in a wide tuning range. The filter consists of a long-period fiber grating (LPFG) with divided coil heaters. Each of the divided coil heaters is controlled individually to adjust a temperature distribution along the LPFG and to modify the spectral shape of the LPFG filter. The tunable band rejection filter is demonstrated to function properly when applied as an erbium-doped fiber amplifier gain-flattening filter.

Keywords

diffraction gratings; optical communication equipment; optical fibre filters; optical tuning; spectral line breadth; temperature distribution; divided coil heaters; erbium-doped fiber amplifier gain-flattening filter; high spectral-shaping flexibility; long-period fiber grating; spectral shape; spectral shape tunable band-rejection filter; temperature distribution; tunable band rejection filter; tuning range; Coils; Concatenated codes; Fiber gratings; Optical fiber filters; Optical fiber polarization; Optical fiber sensors; Optical fibers; Optical filters; Optical sensors; Spectral shape;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2002.807955

Filename

1182773