Gain-clamped S-band discrete Raman amplifier

Author

Yam, S.S.-H. ; An, F.-T. ; Hu, E.S.-T. ; Marhic, M.E. ; Sakamoto, T. ; Kazovsky, L.G. ; Akasaka, Y.

Author_Institution

Opt. Commun. Res. Lab., Stanford Univ., CA, USA

fYear

2002

fDate

17-22 Mar 2002

Firstpage

385

Lastpage

387

Abstract

In summary, we have demonstrated, for the first time to our knowledge, a gain-clamped discrete Raman amplifier in the S-band. The device achieves peak net gain over 22 dB, and a gain variation of only 0.3 dB for signal input power ranging from -20 dBm to 2.7 dBm. Unlike conventional gain-clamping designs, an extinction ratio between signal and lasing wavelength of over 30 dB is achieved. This new technique suppresses instability due to randomly-polarized ASE and double Rayleigh scattering (DRS) (hence noise figure) for small signal input power under high pump power, as well as power surges due to transient effects in Raman amplifiers. This promises a viable technology to provide gain bands not currently available from traditional doped fiber amplifiers.

Keywords

Raman lasers; laser noise; optical communication equipment; optical fibre amplifiers; optical pumping; superradiance; 22 dB; Raman amplifiers; double Rayleigh scattering; gain bands; gain-clamped S-band discrete Raman amplifier; gain-clamping designs; high pump power; lasing wavelength; noise figure; optical fibre amplifiers; peak net gain; randomly-polarized ASE; signal input power; signal wavelength; small signal input power; traditional doped fiber amplifiers; transient effects; Doped fiber amplifiers; Extinction ratio; Gain; High power amplifiers; Noise figure; Raman scattering; Rayleigh scattering; Signal design; Stimulated emission; Surges;

fLanguage

English

Publisher

ieee

Conference_Titel

Optical Fiber Communication Conference and Exhibit, 2002. OFC 2002

Print_ISBN

1-55752-701-6

Type

conf

DOI

10.1109/OFC.2002.1036434

Filename

1036434