Gain‐flattened distributed Raman amplifier with 38‐nm bandwidth using dual‐pump wavelength

Abstract

In this paper, a 38‐nm wideband gain‐flattened distributed Raman amplifier utilising two pump wavelengths is experimentally demonstrated. The pump combination of 1430 and 1456 nm with 26‐nm spacing has enabled a gain flatness of less than 1.1 dB at a Raman on‐off gain of 10 dB. The flat gain is obtained through a careful pump‐power adjustment between these two pump wavelengths without any gain‐flattening filters. The 38‐nm bandwidth covers signal wavelengths from 1530.33 to 1568.78 nm. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 1025–1028, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21590