CMOS monolithic photodetector with a built-in 2-dimensional light direction sensor for laser diode based underwater wireless optical communications
In: Optics Express, Jg. 29 (2021-05-11), S. 16197-16197
Online
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Zugriff:
Underwater wireless optical communications (UWOC) are considered an emerging high-speed wireless network for underwater applications and compete with underwater radio frequency (RF) communications and underwater acoustic communications (UAC). Even though the utilization of laser diodes (LDs) enhances the -3dB modulation bandwidth extraordinarily from a few tens of MHz to GHz, LDs have the features of high collimation and narrow spectrum. Without the point-to-point optical alignment, the performance of the LD-based UWOC system drops exponentially because the received optical power determines the signal-to-noise ratio (SNR) of the UWOC system. To achieve a high-performance and reliable UWOC link based on LDs requires focusing optics and an alignment system. In this paper, we demonstrated a CMOS monolithic photodetector with a built-in 2-dimensional light direction sensor for the UWOC link by using a 450 nm LD and none-return-to-zero on-off keying (NRZ-OOK) modulation method. Employing this innovative technique, the field of view (FOV) was enlarged to 120°, and data rates up to 110 Mb/s at a bit error rate (BER) of 2.3×10−10 were obtained. The establishment of a proposed UWOC physical link showed enhanced communication performance for more practical and robust wireless communication applications.
Titel: |
CMOS monolithic photodetector with a built-in 2-dimensional light direction sensor for laser diode based underwater wireless optical communications
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Autor/in / Beteiligte Person: | Chengfeng, Qiu ; Liu, Zhaojun ; He, Gui ; Wang, Hongyi ; Youyou, Fan ; Lv, Zhijian |
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Zeitschrift: | Optics Express, Jg. 29 (2021-05-11), S. 16197-16197 |
Veröffentlichung: | Optica Publishing Group, 2021 |
Medientyp: | unknown |
ISSN: | 1094-4087 (print) |
DOI: | 10.1364/oe.425792 |
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