碩士 / 國立臺北科技大學 / 光電工程系 / 106 / Underwater wireless optical communication (UWOC) has elicited significant interest over the past few years as a provider of high-speed underwater links. Many applications of UWOC systems have been proposed for environmental monitoring, disaster precaution, and underwater oil pipe investigation. To satisfy the requirements of different applications, a high-speed UWOC system with limited underwater link is needed.
In this paper, two-stage injection-locked and laser beam expander techniques had been adopted to improve the transmission performance. Nevertheless, these techniques have not been utilized to improve the transmission performance of the UWOC system. Two-stage injection-locked technique exhibits an enhancement in frequency response, and the laser beam expander technique can effectively improve the transmission performance of UWOC systems with highly turbid harbor water link due to the higher amounts of light received by optical receiver. Therefore, we successfully show that a 25-Gbps data stream (NRZ-OOK data format) can be delivered to a maximum of 5-m highly turbid harbor water link.
To our understanding, it is the first link test to employ a two-stage injection-locked technique and a laser beam expander in a high-speed 25-Gbps UWOC system. Satisfactory BER performance and clear eye diagram are acquired over a 5-m highly turbid harbor water link.
| Identifer | oai:union.ndltd.org:TW/106TIT05124009 |
| Date | January 2018 |
| Creators | Jing-Kai Chi, 嵇經凱 |
| Contributors | 呂海涵 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 60 |
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