Klitis, C. , Sorel, M. and Strain, M. J. (2019) Active on-chip dispersion control using a tunable silicon Bragg grating. Micromachines, 10(9), e569. (doi: 10.3390/mi10090569)
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Abstract
Actively controllable dispersion in on-chip photonic devices is challenging to implement compared with free space optical components where mechanical degrees of freedom can be employed. Here, we present a method by which continuously tunable group delay control is achieved by modulating the refractive index profile of a silicon Bragg grating using thermo-optic effects. A simple thermal heater element is used to create tunable thermal gradients along the grating length, inducing chirped group delay profiles. Both effective blue and red chirp are realised using a single on-chip device over nanometre scale bandwidths. Group delay slopes are continuously tunable over a few ps/nm range from red to blue chirp, compatible with on-chip dispersion compensation for telecommunications picosecond pulse systems.
| Item Type: | Articles |
|---|---|
| Additional Information: | Funding: This research was funded by EPSRC grant numbers EP/P013597/1, EP/P013570/1, and EP/L021129/1 |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Klitis, Dr Charalambos and Sorel, Professor Marc |
| Authors: | Klitis, C., Sorel, M., and Strain, M. J. |
| College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
| Journal Name: | Micromachines |
| Publisher: | MDPI |
| ISSN: | 2072-666X |
| ISSN (Online): | 2072-666X |
| Published Online: | 28 August 2019 |
| Copyright Holders: | Copyright © 2019 by the authors |
| First Published: | First published in Micromachines 10(9):e569 |
| Publisher Policy: | Reproduced under a Creative Commons license |
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