2.5- and 5-Gbps time-delay self-homodyne interference differential phase-shift keying optical receiver for space-to-ground communication link
| Autor: | Zhi Yanan, Jianfeng Sun, Pan Weiqing, Enwen Dai, Yu Zhou, Wei Lu, Liren Liu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
business.industry General Engineering Optical communication Physics::Optics 02 engineering and technology 01 natural sciences Atomic and Molecular Physics and Optics 010309 optics Direct-conversion receiver Interferometry 020210 optoelectronics & photonics Optics Interference (communication) 0103 physical sciences 0202 electrical engineering electronic engineering information engineering business Adaptive optics Optical path length Free-space optical communication Phase-shift keying |
| Zdroj: | Optical Engineering. 58:1 |
| ISSN: | 0091-3286 |
| DOI: | 10.1117/1.oe.58.1.016114 |
| Popis: | The availability and reliability of the high data rate space-to-ground optical coherent communication links are critically challenged because the wave front of the signal beam is distorted and impaired when propagating through atmospheric turbulence. Based on the free-space interference of two successive data bits delayed by an unequal-arm-length Mach–Zehnder interferometer (MZI), a pupil-matching time-delay self-homodyne interference differential phase-shift keying (DPSK) optical receiver with 2 × 4 90-deg optical hybrid is designed for the high data rate space-to-ground optical communication links due to its immunity from wave front impairment. The delayed optical path difference (OPD) in the unequal-arm-length MZI corresponds to the duration of one bit and can be stabilized to below 1000th of the wavelength by the closed-loop feedback control. The maximum system insertion loss is |
| Databáze: | OpenAIRE |
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