Broadband on-chip silicon-photonics-enabled optical single sideband generation (Conference Presentation)

Awanish Pandey; Vadivukkarasi Jeyaselvan; Shankar Kumar Selvaraja

doi:10.1117/12.2508271

5 March 2019 Broadband on-chip silicon-photonics-enabled optical single sideband generation (Conference Presentation)

Awanish Pandey, Vadivukkarasi Jeyaselvan, Shankar Kumar Selvaraja

Proceedings Volume 10917, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XII; 1091709 (2019) https://doi.org/10.1117/12.2508271
Event: SPIE OPTO, 2019, San Francisco, California, United States

Abstract

Dispersion induced power penalty limits the applicability of Double SideBand with Carrier (DSB+C) signals in Radio-over-Fiber type of communication system. The issue is alleviated using Single Sideband with Carrier (SSB+C) modulated signals where either upper or lower order sidebands are retained while suppressing the others. In this work, we propose a fully integrated and configurable solution to suppress one sideband using Micro Ring Modulator (MRM) and a Self-Coupled Micro Ring Resonator (SCMRR) on Silicon. A DSB+C signal is generated by MRM, and the sideband is suppressed using SCMRR. SCMRR works on splitting of cavity resonance by exciting counter-propagating mode in a controlled manner. The split notches are then utilized for selecting the carrier and one sideband. Using the proposed method, we demonstrate generation of SSB+C signal with a bandwidth of 55GHz and an Optical Sideband Suppression Ratio (OSSR) of 56dB. The solutions offer complete reconfigurability of OSSR via thermo-optic tuning and of bandwidth by varying the resonance split. At 15GHz, we report OSSR tunability of 25dB (15db-38dB) using a Peltier heater and bandwidth of 55GHz and 10GHz by engineering the optical power in the counter-propagating mode. Phase noise and polarization parameter measurements of the down-converted RF signal is performed to assess the spectral purity and polarization dependent variations. We also report bit error rate and eye diagram analysis of our device at 12.5Gbps which is only limited by the capability of the instruments involved.

Conference Presentation

Citation Download Citation

Awanish Pandey, Vadivukkarasi Jeyaselvan, and Shankar Kumar Selvaraja "Broadband on-chip silicon-photonics-enabled optical single sideband generation (Conference Presentation)", Proc. SPIE 10917, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XII, 1091709 (5 March 2019); https://doi.org/10.1117/12.2508271

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KEYWORDS

Silicon photonics

Singular optics

Radio optics

Double sideband modulation

Error analysis

Polarization

Single sideband modulation

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