Abstract
We report optical frequency comb generation by a continuous-wave pumped optical parametric oscillator (OPO) without any active modulation. The OPO is configured as singly resonant with an additional nonlinear crystal (periodically poled ) placed inside the OPO for phase mismatched second harmonic generation (SHG) of the resonating signal beam. The phase mismatched SHG causes cascading nonlinearities, which can substantially increase the effective nonlinearity in , leading to spectral broadening of the OPO signal beam via self-phase modulation. The OPO generates a stable 4 THz wide () frequency comb centered at 1.56 μm.
© 2013 Optical Society of America
Full Article | PDF ArticleMore Like This
Ville Ulvila, C. R. Phillips, Lauri Halonen, and Markku Vainio
Opt. Express 22(9) 10535-10543 (2014)
In-Ho Bae, Han Seb Moon, Seung Kwan Kim, Seung-Nam Park, and Dong-Hoon Lee
Opt. Lett. 38(4) 597-599 (2013)
Chenglin Gu, Minglie Hu, Limeng Zhang, Jintao Fan, Youjian Song, Chingyue Wang, and Derryck T. Reid
Opt. Lett. 38(11) 1820-1822 (2013)