All-fiber acoustooptic filter with low-polarization sensitivity and no frequency shift

Author

Yun, Seok Hyun ; Richardson, D.J. ; Culverhouse, D.O. ; Birks, T.A.

Author_Institution

Optoelectron. Res. Centre, Southampton Univ., UK

Volume

9

Issue

4

fYear

1997

fDate

4/1/1997 12:00:00 AM

Firstpage

461

Lastpage

463

Abstract

An acoustooptic tunable filter based on an all-fiber null coupler, exhibiting low polarization sensitivity and zero net frequency shift, is demonstrated. The polarization dependence has been eliminated by simultaneously applying two acoustic waves that independently satisfy the phase-matching condition for the two eigenpolarization states. A simple double-pass arrangement is employed to exactly cancel the net frequency shift and to provide an enhanced spectral sidelobe suppression of better than -17 dB.

Keywords

acousto-optical filters; acousto-optical switches; eigenvalues and eigenfunctions; optical fibre couplers; optical fibre polarisation; acoustooptic tunable filter; all-fiber acoustooptic filter; all-fiber null coupler; eigenpolarization states; enhanced spectral sidelobe suppression; low-polarization sensitivity; phase-matching condition; simple double-pass arrangement; Acoustic waves; Frequency conversion; Optical coupling; Optical fiber couplers; Optical fiber devices; Optical fiber filters; Optical fiber polarization; Optical filters; Optical frequency conversion; Optical polarization;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.559388

Filename

559388