Nagarjun, KP and Raj, P and Jeyaselvan, V and Selvaraja, SK and Supradeepa, VR (2020) Microwave power induced resonance shifting of silicon ring modulators for continuously tunable, bandwidth scaled frequency combs. In: Optics Express, 28 (9). pp. 13032-13042.
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Abstract
We demonstrate a technique to continuously tune center frequency and repetition rate of optical frequency combs generated in silicon microring modulators and bandwidth scale them. We utilize a drive frequency dependent, microwave power induced shifting of the microring modulator resonance. In this work, we demonstrate center frequency tunability of frequency combs generated in silicon microring modulators over a wide range (∼8nm) with fixed number of lines. We also demonstrate continuously tunable repetition rates from 7.5GHz to 15GHz. Further, we use this effect to demonstrate a proof-of-principle experiment to bandwidth scale an 8-line (20dB band) comb generated from a single ring modulator driven at 10GHz to a comb with 12 and 15 lines by cascading two and three ring modulators, respectively. This is accomplished by merging widely spaced ring modulator resonances to a common location, thus coupling light simultaneously into multiple cascaded ring modulators.
| Item Type: | Journal Article |
|---|---|
| Publication: | Optics Express |
| Publisher: | The Optical Society |
| Additional Information: | Copy right for this article belongs to The Optical Society |
| Keywords: | Bandwidth; Microwave generation; Resonance; Silicon, Center frequency; Frequency combs; Frequency dependent; Microring modulator; Optical frequency combs; Proof-of-principle experiments; Ring modulators; Scaled frequencies, Light modulators |
| Department/Centre: | Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering |
| Date Deposited: | 30 Sep 2020 06:42 |
| Last Modified: | 30 Sep 2020 06:42 |
| URI: | http://eprints.iisc.ac.in/id/eprint/65607 |
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