Microwave-modulated optical systems for free-space and undersea communications

用于自由空间和海底通信的微波调制光学系统

• 批准号: DP0451977
• 负责人: Prof Judith Dawes
• 金额: $ 19.44万
• 依托单位: Macquarie University
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2004
• 资助国家: 澳大利亚
• 起止时间: 2004-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP0451977
• 关键词: Microwave; modulated; optical; systems; free

Although offering flexible, rapid deployment, free space and underwater comunications have not kept up with progress in optical fibre communications, and current systems are signficantly restricted in range and data rate. To address these needs, we will develop novel laser systems using coherent detection, with infrared output for eyesafe transmission in air, and blue-green output for transmission underwater. The signal is a microwave modulation on the optical carrier, which permits longer-range transmission while maintaining signal coherence. Key advantages include increased detection sensitivity, and potential to scale up the modulation frequency and the power for higher data rates and longer propagation distance.

尽管提供了灵活、快速的部署，但自由空间和水下通信并没有跟上光纤通信的进步，而且目前的系统在范围和数据速率方面受到很大限制。为了满足这些需求，我们将开发使用相干探测的新型激光系统，其中红外输出用于在空气中进行眼睛安全传输，蓝绿输出用于水下传输。该信号是光载波上的微波调制，在保持信号相干性的同时允许更远距离的传输。其主要优点包括提高检测灵敏度，并有可能扩大调制频率和功率，以实现更高的数据速率和更长的传播距离。