All-optical signal gating in cascaded long-period fiber gratings

Author

Yoonchan Jeong ; Seungin Baek ; Jaejoong Kwon ; Byoungho Lee

Author_Institution

Sch. of Electr. Eng., Seoul Nat. Univ., South Korea

fYear

2000

fDate

10-15 Sept. 2000

Abstract

Summary form only given. Using a nonlinear phase shift in a signal wave by means of cross-phase modulation (XPM) from a synchronized pump wave, we can detune transmission spectra of long-period fiber gratings (LPFG´s). Thus, the transmission loss fringe shifts to longer wavelengths when the effective index for a signal wave increases by a nonlinear phase shift due to XPM from a pump wave. Utilizing a narrow spectral loss band from an LPFG pair, we could reduce the operation intensity to less than 5 GW/cm/sup 2/. We demonstrated for the first time to the best of our knowledge that a signal wave can be gated all-optically by means of a pump wave in LPFG´s.

Keywords

diffraction gratings; optical fibre losses; optical fibre testing; optical modulation; optical pumping; optical tuning; phase modulation; all-optical signal gating; all-optically gated; cascaded long-period fiber gratings; cross-phase modulation; effective index; narrow spectral loss band; nonlinear phase shift; operation intensity; pump wave; signal wave; synchronized pump wave; transmission loss fringe shift; transmission spectra detuning; Fiber gratings; Optical pumping; Optimized production technology; Photorefractive effect;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics Europe, 2000. Conference Digest. 2000 Conference on

Conference_Location

Nice

Print_ISBN

0-7803-6319-1

Type

conf

DOI

10.1109/CLEOE.2000.910257

Filename

910257