Four-wave mixing between pump and signal in a distributed Raman amplifier

Author

Kung, Tsu-Te ; Chang, Ching-Ten ; Dung, Jeng-Cherng ; Chi, Sien

Author_Institution

Inst. of Electro-Opt. Eng., Hsinchu, Taiwan

Volume

21

Issue

5

fYear

2003

fDate

5/1/2003 12:00:00 AM

Firstpage

1164

Lastpage

1170

Abstract

We observed experimentally four-wave mixing (FWM) between a 14xx-nm pump and a 15xx-nm signal in a forward-pumped distributed Raman amplifier (DRA) over 50 km of nonzero dispersion-shifted fiber with a zero dispersion wavelength of 1497 nm. The 100-mW pump Fabry-Perot (FP) spectra centered at 1440, 1450, and 1460 nm are reproduced via FWM around the single-wavelength probe signal around 1558, 1548, and 1538 nm, respectively. The suppression of DRA gain by about 2-3 dB was experimentally observed with peak FWM at minimum phase mismatching between two 14xx-nm FP pump wavelengths and two 15xx-nm signal wavelengths. This DRA gain suppression, together with the reproduced pump FP spectrum at 15xx-nm signal band, may limit the usefulness of the forward-pumped DRA, generating spectrally nonuniform FWM-induced noise floors and crosstalk in wavelength-division-multiplexed fiber-optic transmission systems.

Keywords

Raman lasers; infrared spectra; multiwave mixing; optical communication equipment; optical crosstalk; optical fibre amplifiers; optical fibre dispersion; optical pumping; wavelength division multiplexing; 100 mW; 1440 nm; 1450 nm; 1460 nm; 1497 nm; 50 km; DRA gain; dispersion wavelength; distributed Raman fibre amplifier; forward-pumped DRA; forward-pumped distributed Raman amplifier; four-wave mixing; gain suppression; minimum phase mismatching; nonzero dispersion-shifted fiber; optical crosstalk; pump FP spectrum; pump Fabry-Perot spectra; pump wavelengths; signal band; single-wavelength probe signal; spectrally nonuniform FWM-induced noise floors; wavelength-division-multiplexed fiber-optic transmission systems; Crosstalk; Distributed amplifiers; Fiber nonlinear optics; Four-wave mixing; Optical fiber amplifiers; Optical noise; Optical pumping; Probes; Signal generators; Stimulated emission;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2003.810929

Filename

1213572