We report a unique spectral narrowing and manipulation technique in an optical parametric oscillator (OPO) realized by an integrated periodically poled lithium niobate comprising an optical parametric gain medium sandwiched by two electro-optic polarization-mode converters (EO PMCs). We achieved a manipulation of the gain spectrum of the OPO via EO and/or temperature control of the EO PMCs, in which we obtained single to multiple signal spectral peaks from the OPO with a spectral width reduced by up to 10 times and peak intensity increased by up to 6 times in comparison with the original signal. Fast EO tuning of the narrowed signal spectral peak has also been demonstrated.
© 2011 Optical Society of America
Original Manuscript: April 15, 2011
Revised Manuscript: May 20, 2011
Manuscript Accepted: May 22, 2011
Published: June 15, 2011
Yen-Hung Chen, Jui-Wen Chang, Chao-Hung Lin, Wei-Kun Chang, Ning Hsu, Ying-Yu Lai, Quan-Hsiang Tseng, Reinhard Geiss, Thomas Pertsch, and Sidney S. Yang, "Spectral narrowing and manipulation in an optical parametric oscillator using periodically poled lithium niobate electro-optic polarization-mode converters," Opt. Lett. 36, 2345-2347 (2011)