User login

Spiral Bragg grating waveguides for TM mode silicon photonics

Publication Type:

Journal Article

Source:

Optics Express, Volume 23, Issue 19, p.25295-25307 (2015)

URL:

https://www.osapublishing.org/oe/abstract.cfm?uri=oe-23-19-25295

Keywords:

Gratings; Integrated optics devices; Waveguides

Abstract:

We demonstrate spiral Bragg grating waveguides (BGWs) on the silicon-on-insulator (SOI) platform for the fundamental transverse magnetic (TM) mode. We also compare TM spiral waveguides to equivalent transverse electric (TE) spiral waveguides and show that the TM spiral waveguides have lower propagation losses. Our spiral waveguides are space-efficient, requiring only areas of 131×131 µm2 to accommodate 4 mm long BGWs, and, thus, are less susceptible to fabrication non-uniformities. Due to the lengths and reduced susceptibility to fabrication non-uniformities, we were able to obtain narrow bandwidth, large extinction ratio (ER) devices, as narrow as 0.09 nm and as large as 52 dB, respectively. Finally, we demonstrate a 4 mm long TM chirped spiral Bragg grating waveguide with a negative, average, group delay slope of −11 ps/nm.

Faculty Member(s): 
Lukas.Chrostowski
Faculty Member(s): 
Nicolas.Jaeger
Research Area(s): 
Photonics and Optics