Analyses of unintentional intensity modulation in all-fiber acousto-optic tunable filters | Zendy

Kwang Jo Lee | Zendy; In-Kag Hwang | Zendy; Hoon Cheol Park | Zendy; Ki Hak Nam | Zendy; Byoung Yoon Kim | Zendy

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Analyses of unintentional intensity modulation in all-fiber acousto-optic tunable filters

Author(s) -

Kwang Jo Lee,

In-Kag Hwang,

Hoon Cheol Park,

Ki Hak Nam,

Byoung Yoon Kim

Publication year - 2010

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.18.003985

Subject(s) - optics , harmonics , modulation (music) , reflection (computer programming) , intensity modulation , materials science , acoustics , acoustic wave , optical fiber , coupling (piping) , filter (signal processing) , wavelength , harmonic , frequency modulation , electronic filter , signal (programming language) , physics , phase modulation , telecommunications , bandwidth (computing) , power (physics) , computer science , phase noise , quantum mechanics , voltage , metallurgy , computer vision , programming language

We theoretically and experimentally analyze unintentional intensity modulation phenomena in two types of all-fiber acousto-optic tunable filters utilizing flexural and torsional acoustic waves. Output filter signal at a resonant wavelength shows time-varying oscillations with even- and odd-order harmonics of applied acoustic frequency, which are explained by two factors of static mode coupling and acoustic back reflection. The magnitudes of static coupling and acoustic reflection in our devices are estimated from the measured first and second harmonic modulation powers.

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