Nature Photonics 焦點報導
最近臺灣大學光電所林恭如教授和國王阿卜杜拉大學科學與立交通大學合作，
演示可傳輸5.4米距離操作位元率高達4.8 Gbits/sec資料速率的高速水下光通信連結。
此自由空間通信連結是使用波長為 450 奈米與功率僅15 毫瓦的藍光雷射二極體作為直接調變光源，
在對藍綠光均有低吸收率透光窗口的海水中傳送正交分頻多工格式訊號，
然後由矽雪崩光電二極體接收機檢測並經程式解碼驗證傳輸性能。
對於16 QAM OFDM直接調變的多工格式信號經過優化連結後解碼的信號雜訊比可達15.63dB
和誤碼率低於2.6 × 10-3，此一高速水下光通訊連結預計將用於提供水下感應器網路和遠端操作的
水下載具資料連線。
報導原文如下:
A high-speed underwater optical communications link that operates at a data rate
of 4.8 Gbits s−1 over a distance of 5.4 m has been demonstrated by scientists
in Saudi Arabia and Taiwan. The link is the result of work by Hassan Oubei
and co-workers from King Abdullah University of Science and Technology (KAUST),
National Taiwan University and National Chiao Tung University. It makes use of
a 15 mW blue laser diode with a wavelength of 450 nm to transmit light pulses
in the blue-green low-absorption window of seawater, which are then detected
by a silicon avalanche photodiode-based receiver. A 16-QAM-OFDM modulation
and multiplexing format is used to optimize the links signal-to-noise ratio
(15.63 dB) and bit error rate (2.6 × 10−3). Such high-speed underwater
communication links are expected to be useful for providing data connections
to sensor networks and remotely operated vehicles.
報導網址:
Nature Photonics 9, 707 (2015) doi:10.1038/nphoton.2015.218
Published online 29 October 2015
期刊論文網址
Optics Express 23, 23302–23309 (2015), doi: 10.1364/OE.23.023302
https://www.osapublishing.org/oe/abstract.cfm?uri=oe-23-18-23302