Carrier-assisted differential detection

William Shieh; Chuanbowen Sun; Honglin Ji

doi:10.1038/s41377-020-0253-8

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Carrier-assisted differential detection

Article

- Carrier-assisted differential detection
- Light: Science & Applications Vol. 9, Issue 1, Pages: 158-166(2020)
- Affiliations：
  
  Department of Electrical and Electronic Engineering, The University of Melbourne, Parkville VIC3010, Australia
- Author bio：
  
  William Shieh (shiehw@unimelb.edu.au)
- Funds：
- DOI：10.1038/s41377-020-0253-8
  CLC：
- Published：2020，
  
  Published Online：10 February 2020，
  
  Received：05 November 2019，
  
  Revised：18 January 2020，
  
  Accepted：20 January 2020
- Accepted：
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Shieh, W. Sun, C. & Ji, H. L. Carrier-assisted differential detection. Light: Science & Applications, 9, 158–166 (2020).
DOI：

Shieh, W. Sun, C. & Ji, H. L. Carrier-assisted differential detection. Light: Science & Applications, 9, 158–166 (2020). DOI： 10.1038/s41377-020-0253-8.

摘要

Abstract

To overcome power fading induced by chromatic dispersion in optical fiber communications

optical field recovery is a promising solution for direct detection short-reach applications

such as fast-evolving data center interconnects (DCIs). To date

various direct detection schemes capable of optical field recovery have been proposed

including Kramers-Kronig (KK) and signal-signal beat interference (SSBI) iterative cancellation (IC) receivers. However

they are all restricted to the single sideband (SSB) modulation format

thus conspicuously losing half of the electrical spectral efficiency (SE) compared with double sideband (DSB) modulation. Additionally

SSB suffers from the noise folding issue

requiring a precise optical filter that complicates the receiver design. As such

it is highly desirable to investigate the field recovery of DSB signals via direct detection. In this paper

for the first time

we propose a novel receiver scheme called carrier-assisted differential detection (CADD) to realize optical field recovery of complex-valued DSB signals via direct detection. First

CADD doubles the electrical SE compared with the KK and SSBI IC receivers by adopting DSB modulation without sacrificing receiver sensitivities. Furthermore

by using direct detection without needing a precise receiver optical filter

CADD can employ cost-effective uncooled lasers as opposed to expensive temperature-controlled lasers in coherent systems. Our proposed receiver architecture opens a new class of direct detection schemes that are suitable for photonic integration analogous to homodyne receivers in coherent detection.

关键词

Keywords

references

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文献全部内容项

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