All-fiber bandpass filter with adjustable transmission using cladding-mode coupling

Author

Starodubov, D.S. ; Grubsky, V. ; Feinberg, J.

Author_Institution

D-STAR Technol. Inc., Manhattan Beach, CA, USA

Volume

10

Issue

11

fYear

1998

Firstpage

1590

Lastpage

1592

Abstract

We demonstrate an all-fiber bandpass filter with 2-nm bandwidth and more than 25 dB of nonresonant light suppression (ignoring sidelobes) in a 60-nm-wide spectral range around its central wavelength. This novel device uses a pair of long-period gratings to couple resonant light from the fiber core into the cladding and then back into the core. The amplitude transmission through the filter is dynamically adjustable over a 20-dB range.

Keywords

band-pass filters; diffraction gratings; optical communication equipment; optical fibre cladding; optical fibre couplers; optical fibre filters; adjustable transmission; all-fiber bandpass filter; amplitude transmission; central wavelength; cladding-mode coupling; dynamically adjustable; fiber cladding; fiber core; long-period grating pair; nonresonant light suppression; resonant light coupling; spectral range; Amplitude modulation; Band pass filters; Bragg gratings; Fiber gratings; Optical coupling; Optical fiber communication; Optical fiber devices; Optical fiber filters; Optical fibers; Resonance;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.726759

Filename

726759