Bragg waveguides are fundamental components in photonic integrated circuits and are particularly interesting for mid-IR applications in high index, highly nonlinear materials. In this work, we present Bragg waveguides fabricated in bulk chalcogenide glass using an ultrafast laser. Waveguides with near circularly symmetric cross sections and low propagation loss are obtained through spatial and temporal beam shaping. Using a single-pass technique, the waveguide and Bragg structure are formed at the same time. First through sixth order gratings with strengths of up to 25 dB are realized, and performance is evaluated based on the modulation duty cycle of the writing beam.
© 2014 Optical Society of AmericaFull Article | PDF Article
Stéphanie Jetté-Charbonneau and Pierre Berini
J. Opt. Soc. Am. A 23(7) 1757-1767 (2006)
Neil J. Baker, Ho W. Lee, Ian C. M. Littler, C. Martijn de Sterke, Benjamin J. Eggleton, Duk-Yong Choi, Steve Madden, and Barry Luther-Davies
Opt. Express 14(20) 9451-9459 (2006)
Duk-Yong Choi, Steve Madden, Andrei Rode, Rongping Wang, Barry Luther-Davies, Neil J. Baker, and Benjamin J. Eggleton
Opt. Express 15(12) 7708-7712 (2007)