Microcavity-based narrowband parametric amplifier for carrier recovery in optical coherent self-homodyne detection
| Autor: | Heng Zhou, Boyang Wang, Wenwen Cui, Qiang Zhou, Qing Wen, Baojian Wu, Yong Geng |
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| Rok vydání: | 2019 |
| Předmět: |
Physics
business.industry Bandwidth (signal processing) 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Optical parametric amplifier Atomic and Molecular Physics and Optics 010309 optics Narrowband Optics Homodyne detection 0103 physical sciences Parametric oscillator Carrier recovery 0210 nano-technology business Phase modulation Quadrature amplitude modulation |
| Zdroj: | Optics letters. 44(14) |
| ISSN: | 1539-4794 |
| Popis: | We demonstrate all-optical carrier recovery exploring optical parametric amplification (OPA) in a monolithic high-finesse silicon nitride microring cavity. Compared to a nonresonant OPA process in nonlinear waveguides, cavity-based OPA allows a much narrower gain bandwidth by manipulating the intracavity light interactions with a controllable parametric gain, thus facilitating high-resolution carrier extraction without needing a large guard band between the carrier tone and data spectrum. Here, we achieve narrowband OPA with a 22.0 dB peak gain and a bandwidth as low as 15.2 MHz in a 100 μm radius microring cavity, which is applied to implement carrier recovery of a 16QAM optical orthogonal-frequency-division-multiplexing data signal. A highly coherent phase is conserved between the recovered carrier tone and the original data, enabling self-homodyne detection with high data quality and minimized electrical compensation. Our study holds potential to constitute energy-friendly coherent receivers. |
| Databáze: | OpenAIRE |
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