Abstract
We propose a novel quasi-phase-matched (QPM) device that can generate unequally spaced multiple wavelengths. Unequally spaced multiple QPM peaks can be obtained by employing the optimized phase modulation of a periodic domain structure. We fabricated a waveguide device for band difference frequency generation based on the design. Using the multiple mid-infrared outputs, we demonstrate the detection of multiple hydrocarbon gases, namely, methane, ethylene, and ethane.
© 2007 Optical Society of America
Full Article | PDF ArticleMore Like This
T. Umeki, M. Asobe, Y. Nishida, O. Tadanaga, K. Magari, T. Yanagawa, and H. Suzuki
Opt. Lett. 32(9) 1129-1131 (2007)
M. H. Chou, K. R. Parameswaran, M. M. Fejer, and I. Brener
Opt. Lett. 24(16) 1157-1159 (1999)
Isao Tomita, Takeshi Umeki, Osamu Tadanaga, Hongbin Song, and Masaki Asobe
Opt. Lett. 35(6) 805-807 (2010)