We experimentally demonstrate highly efficient coupling into a slow light slotted photonic crystal waveguide. With optical mode converters and group index tapers that provide good optical mode matching and impedance matching, a nearly flat transmission over the entire guided mode spectrum of 68.8 nm range with 2.4 dB minimum insertion loss is demonstrated. Measurements also show up to 20 dB baseline enhancement and 30 dB enhancement in the slow light region, indicating that it is possible to design highly efficient and compact devices that benefit from the slow light enhancement without increasing the coupling loss.
© 2012 Optical Society of AmericaFull Article | PDF Article
Sharee J. McNab, Nikolaj Moll, and Yurii A. Vlasov
Opt. Express 11(22) 2927-2939 (2003)
Ning-Ning Feng, Rong Sun, Lionel C. Kimerling, and Jurgen Michel
Opt. Lett. 32(10) 1250-1252 (2007)
Haishan Sun, Antao Chen, Attila Szep, and Larry R. Dalton
Opt. Express 17(25) 22571-22577 (2009)