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Broadband, Flat Frequency Comb Generated Using Pulse Shaping-Assisted Nonlinear Spectral Broadening

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3 Author(s)
Xin Yang ; Optoelectron. Res. Center, Univ. of Southampton, Southampton, UK ; Richardson, D.J. ; Petropoulos, P.

In this letter, we demonstrate the nonlinear generation of a low noise, ultra-flat frequency comb covering the full C-band. The comb is generated using nonlinear spectral broadening on a mode-locked laser, assisted by adaptive pulse shaping. A linear pulse shaping element, which is dynamically controlled by an adaptive algorithm exploiting the covariance matrix adaptation evolution strategy, is placed prior to a nonlinear element. A 3-dB bandwidth of 35 nm is achieved, and the power variations about a central region of 30 nm are less than 1 dB.

Published in:

Photonics Technology Letters, IEEE  (Volume:25 ,  Issue: 6 )