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Recent Progress in Simplified Coherent Technology
- Study on Optical Communications Issue 1, (2025)
- 作者机构：
a.中国信息通信科技集团有限公司 光纤通信技术与网络全国重点实验室，武汉 430220
b.中国信息通信科技集团有限公司 烽火藤仓光纤科技有限公司，武汉 430070
c.中国信息通信科技集团有限公司 武汉邮电科学研究院，武汉 430074
- 作者简介：
- 基金信息：
DOI：10.13756/j.gtxyj.2025.230165
CLC： TN929.11Published：10 February 2025，
Received：10 November 2023，
Revised：20 December 2023，
- 稿件说明：
移动端阅览
胡山，李威，潘映梅，等. 简化相干技术研究进展[J]. 光通信研究，2025(1): 230165.
Hu S, Li W, Pan Y M, et al. Recent Progress in Simplified Coherent Technology[J]. Study on Optical Communications, 2025(1): 230165.
胡山，李威，潘映梅，等. 简化相干技术研究进展[J]. 光通信研究，2025(1): 230165. DOI： 10.13756/j.gtxyj.2025.230165.
Hu S, Li W, Pan Y M, et al. Recent Progress in Simplified Coherent Technology[J]. Study on Optical Communications, 2025(1): 230165. DOI： 10.13756/j.gtxyj.2025.230165.
摘要
随着光通信技术在现代社会生产生活中的广泛应用，其应用场景日益多样化和复杂化。尤其在数据中心和宇航等领域，传统数字相干光通信接收方法的复杂度和功耗问题日益凸显。近年来，模拟相干技术因其能在保持通信质量的同时降低复杂度和功耗而备受关注。该技术通过使用模拟器件实现传统数字相干光通信接收端的部分或全部功能，从而简化了接收结构并降低了功耗。文章首先介绍了模拟相干技术的典型架构，展示了其主要组成部分；然后具体介绍了各个部分的原理、具体结构和实现方式，包括时钟与载波恢复、光域偏振解复用（偏振旋转补偿）和模拟自适应均衡；最后介绍了与模拟相干技术相近的其他简化相干技术，包括准相干接收技术、Kramers-Kronig（KK）接收技术和差分接收技术，分析了这些技术的原理，列出了目前主要的研究成果，并介绍了其各自的优缺点及应用场景。通过对模拟相干及其他简化相干技术的原理和研究现状的分析，比较了各种简化相干方式的优点和不足，阐述了简化相干技术未来应发展的方向，为未来简化相干技术的研究提供了参考。
Abstract
With the increasingly widespread application of optical communication technology in modern social production and life
the application scenarios of optical communication technology are becoming increasingly diverse and challenging. In energy sensitive scenarios such as data centers and aerospace
traditional digital coherent optical communication reception methods are difficult to reduce complexity and power consumption
and have obvious limitations. Analog coherent technology is a simplified coherent technology that utilizes analog devices to achieve part or all of the functions of the traditional digital coherent optical communication receiver
in order to simplify the receiver structure and reduce power consumption. Compared to traditional digital coherent optical communication receiving technology
analog coherent technology has obvious advantages in power consumption
complexity
and cost. This paper first introduces the typical architecture of analog coherent technology and demonstrates its main components. Then
the principles
specific structures
and implementation methods of each part are specifically introduced
including clock and carrier recovery
optical domain polarization demultiplexing (polarization rotation compensation)
and analog adaptive equalization. Finally
other simplified coherent technology similar to analog coherent technology are introduced
including quasi coherent reception technology
Kramers-Kronig (KK) reception technology
and differential reception technology. Through the analysis of the principles and current research status of analog coherent and other simplified coherent techniques
this paper compares the advantages and disadvantages of various simplified coherent methods
elucidates the future development directions of simplified coherent technology
and provides a reference for future research on simplified coherent technology.
关键词
Keywords
references
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