학술논문
Large Submillimeter High-Speed Photodetector for Large Aperture FSO Receiver
Document Type
Periodical
Author
Source
IEEE Journal of Selected Topics in Quantum Electronics IEEE J. Select. Topics Quantum Electron. Selected Topics in Quantum Electronics, IEEE Journal of. 28(2: Optical Detectors):1-9 Apr, 2022
Subject
Language
ISSN
1077-260X
1558-4542
1558-4542
Abstract
We report a large submillimeter high-speed arrayed photodetector (PD) with a single-output design for high optical-alignment robustness free-space optical (FSO) communications. To realize a large photodetective area with a single-output design of over 10 Gbps, 8 × 8 multi-pixel PDs were designed and fabricated in a series–and-parallel network. To avoid sacrificing the frequency response, we successfully developed a large photodetective area PD, as large as 0.4 mm × 0.4 mm, with the same frequency response (8.5 GHz) as that in a small single PD (40-μm diameter worth). With the photodetector design and its characteristics, a high data-rate FSO demonstration of up to 25 Gbps for 10-m FSO communications was presented.