稳定和波长可调节的多波长激光用于高速度测量设备的独立量子密钥分布
Jia-Lin Chen1,2, De-Yong He1,2,3, Ze-Hao Wang1,2
1CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, Anhui 230026, China.
The Review of scientific instruments
|June 11, 2024
概括
我们开发了一种稳定的多波长激光,可以显著提高量子密钥分布速度. 这一突破被动稳定了激光波长,几乎使测量设备独立量子密钥分布系统中的秘密密钥速率翻了一番.
科学领域:
- 量子信息科学 量子信息科学
- 光学工程是指光学工程.
- 激光物理 激光物理
背景情况:
- 测量设备独立量子密钥分布 (MDI QKD) 提供了增强的安全性,但受到低秘密密钥率的限制.
- 目前用于提高MDI QKD速率的方法,如波长分割多重复合 (WDM),通常需要复杂的活性波长稳定.
- 主动稳定要求精确的外部引用,增加系统复杂性和成本.
研究的目的:
- 展示一种稳定,波长可调的多波长激光,用于增强MDI QKD系统.
- 通过被动实现高波长稳定,减少系统复杂性.
- 通过提高激光性能来提高MDI QKD的秘密密钥速率.
主要方法:
- 开发了一种具有通过精确的温度控制和稳定的驱动电流来锁定被动波长的多波长激光.
- 实现了从1270nm到1610nm的广泛输出波长调范围.
- 将激光与波长分割多重复合 (WDM) 集成为MDI QKD.
主要成果:
- 证明了显著的被动波长稳定性.
- 在MDI QKD系统中显著降低了错误率.
- 与之前的实验相比,实现了近两倍的秘密密钥速率.
- 在多个密集的WDM频道中提供灵活的操作,具有5.1nm调范围.
结论:
- 开发的多波长激光器为高速率的MDI QKD提供了一个有前途的解决方案.
- 被动波长稳定简化了系统设计,降低了成本.
- 激光的稳定性和广泛的调整范围提高了MDI QKD的性能和灵活性.
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