阿迪亚巴特弱连贯MHz线宽O频段单光子载体用于低误相解码
Optics express
|June 11, 2024
概括
这项研究通过稳定注射锁分布式反激光器 (DFBLD) 和干扰仪来增强使用O频段激光器的安全数据通信. 该方法改进了15公里单模光纤 (SMF) 上的相位转换键 (PSK) 传输.
科学领域:
- 量子通信是一种量子通信.
- 光学工程是指光学工程.
- 光子学 是一个光子学.
背景情况:
- 商用O波段激光器用于单光子通信,其纤维损耗很大,线宽宽,波长不稳定.
- 有效的阶段编码链接需要克服这些限制,以获得高安全密钥速率.
研究的目的:
- 设计和实施O频段单光子安全数据通信的稳定系统.
- 通过大都会网络实现高效的阶段编码链接,提高安全密钥速率.
主要方法:
- 一个专门设计的adiabatic包,具有主动温度和电流反控制,用于配对的O频段MHz线宽主到奴隶注射锁分布式反激光二极管 (DFBLD).
- 稳定一个保持偏振的1比特延迟干扰仪,使用一个被动的附带电池进行精确的差分相位解码.
- 通过精确控制主注入水平和减少偏向注入来缓解Auger加热,抑制相位码扭曲.
主要成果:
- 识别了比特边缘的phonon诱导的相位波动,并将其归因于主DFBLD注入的内腔加热.
- 由过度注射诱导的Auger加热引起的相位代码扭曲被有效地抑制.
- 单光子差分相位移 (DPS) 键化数据传输通过15公里单模光纤 (SMF) 实现,比特误差比率略有增加,从<3%增加到6.2%.
结论:
- 拟议的增压包装和反控制稳定了O频段的DFBLD,以实现安全的通信.
- 精确控制注入水平和偏移电流,有效地抑制相位波动和扭曲.
- 该系统可在15公里的SMF上实现可靠的单光子DPS-keying传输,为加强大都市网络安全铺平了道路.
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