RT info:eu-repo/semantics/article T1 Generation of a reference frequency comb by cascaded four-wave mixing enhanced by Raman amplification A1 Carrasco-Sanz, A. A1 Martín López, Sonia A1 González Herráez, Miguel A1 Corredera, Pedro A1 Hernanz, M.L. A1 Abrardi, L. K1 Four-wave mixing K1 Frequency comb K1 Raman amplification K1 Semiconductor optical amplifier K1 Standard frequencies K1 Electrónica K1 Electronics AB The generation of standard reference frequencies close to the ITU channels is essential for the frequency calibration of DWDM systems. This paper describes the generation of a reference frequency comb based on the combination of a cascaded four-wave mixing in two semiconductor optical amplifiers and Raman amplification in a dispersion-shifted optical fiber. As a result we have achieved a stable frequency comb with 36 reference lines separated by a constant frequency spacing of 177 GHz. The seed of the comb is combination of two narrow-linewidth semiconductor lasers which are locked to two absorption lines of the acetylene (12C2H2). PB Elsevier SN 0030-4018 YR 2008 FD 2008-05-15 LK http://hdl.handle.net/10017/28459 UL http://hdl.handle.net/10017/28459 LA eng NO Ministerio de Educación y Ciencia DS MINDS@UW RD 07-jun-2023