IEEE PHOTONICS TECHNOLOGY LETTERS, vol.20, pp.36-38, 2008 (SCI-Expanded)
We propose a theory and experimentally verify ultra-flat comb generation by dual-sine-wave phase-only modulation. This novel approach requires a single optical element and is very practical and efficient in terms of both power budget and bandwidth. Using this approach, we have generated two optical spectra, one with 11 comb lines and 1.9-dB flatness and the other with 9 comb lines and 0.8-dB flatness.