Performance enhancement of gain saturated SOA based free space optical link using dual-wavelength transmission

Yan Qing Hong, Won Ho Shin, Sang Kook Han

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

This paper proposes the dual-wavelength transmission technique for improving the performance of the gain-saturated semiconductor optical amplifier (SOA)-based free-space optical (FSO) communication link. When the gain saturated SOA is used to suppress turbulence-induced scintillation, extinction ratio (ER) degradation effect occurs owing to the high-dynamic gain frequency characteristics for intensity modulation and direct detection (IM/DD) system. The proposed method uses small-spacing dual-wavelength (signal and supplemental wavelengths) transmission to compensate ER degradation by mitigating the gain difference between the bits ‘1’ and ‘0’. Regarding the supplemental wavelength, continuous wave (CW) with various average powers and differential signal (DS) transmissions are experimentally investigated. The proposed technique is evaluated under various turbulence channel strengths. The experimental results show that the bit-error rate (BER) performance is significantly improved via effective ER degradation compensation and scintillation suppression.

Original languageEnglish
Pages (from-to)134-140
Number of pages7
JournalOptics Communications
Volume446
DOIs
Publication statusPublished - 2019 Sep 1

Fingerprint

Optical links
Semiconductor optical amplifiers
Wave transmission
light amplifiers
Wavelength
extinction
augmentation
Scintillation
degradation
wavelengths
Degradation
scintillation
Turbulence
turbulence
free-space optical communication
signal transmission
Optical communication
bit error rate
Bit error rate
Telecommunication links

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Cite this

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abstract = "This paper proposes the dual-wavelength transmission technique for improving the performance of the gain-saturated semiconductor optical amplifier (SOA)-based free-space optical (FSO) communication link. When the gain saturated SOA is used to suppress turbulence-induced scintillation, extinction ratio (ER) degradation effect occurs owing to the high-dynamic gain frequency characteristics for intensity modulation and direct detection (IM/DD) system. The proposed method uses small-spacing dual-wavelength (signal and supplemental wavelengths) transmission to compensate ER degradation by mitigating the gain difference between the bits ‘1’ and ‘0’. Regarding the supplemental wavelength, continuous wave (CW) with various average powers and differential signal (DS) transmissions are experimentally investigated. The proposed technique is evaluated under various turbulence channel strengths. The experimental results show that the bit-error rate (BER) performance is significantly improved via effective ER degradation compensation and scintillation suppression.",
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Performance enhancement of gain saturated SOA based free space optical link using dual-wavelength transmission. / Hong, Yan Qing; Shin, Won Ho; Han, Sang Kook.

In: Optics Communications, Vol. 446, 01.09.2019, p. 134-140.

Research output: Contribution to journalArticle

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