Discretely tunable optical delay lines using step-chirped subwavelength grating Bragg gratings (Student’s paper)
Hao Sun1 and Lawrence R. Chen1
1 Department of Electrical and Computer Engineering, McGill University, Montreal, QC H3A 0E9 Canada
A discretely tunable optical delay line based on step-chirped subwavelength grating Bragg gratings is proposed and experimentally demonstrated. A total delay of 55 ps in steps of 9 ps is obtained over an operating bandwidth of 29 nm. The device is fabricated using electron beam lithography with a single etch in silicon on insulator.
Keywords: subwavelength grating, silicon photonics, time delay, Bragg grating
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