High-conversion-efficiency all-optical wavelength converter based on cascaded highly nonlinear fibers

Jiaqin Qian; Bowen Chen; Wei Chen; Mingyi Gao

doi:10.1364/AO.56.005871

Applied Optics
Vol. 56,
Issue 21,
pp. 5871-5876
(2017)
•https://doi.org/10.1364/AO.56.005871

High-conversion-efficiency all-optical wavelength converter based on cascaded highly nonlinear fibers

Jiaqin Qian, Bowen Chen, Wei Chen, and Mingyi Gao

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Jiaqin Qian, Bowen Chen, Wei Chen, and Mingyi Gao, "High-conversion-efficiency all-optical wavelength converter based on cascaded highly nonlinear fibers," Appl. Opt. 56, 5871-5876 (2017)

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Table of Contents Category
- Fiber Optics and Optical Communications
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About this Article
History
- Original Manuscript: May 3, 2017
- Revised Manuscript: June 5, 2017
- Manuscript Accepted: June 6, 2017
- Published: July 13, 2017

Abstract

All-optical wavelength converters based on parametric processing of highly nonlinear fiber (HNLF) can provide low energy consumption, fast process speed, and modulation format agnosticism. A longer HNLF with a larger nonlinear coefficient and high pump power will contribute to achieve higher conversion efficiency. However, the injected pump power to the fiber is limited by its stimulated Brillouin scattering threshold, where longer fibers always have lower threshold powers. In the paper, we propose an all-optical wavelength converter with higher conversion efficiency by cascading two different HNLFs. We experimentally achieved $- 8 dB$ conversion efficiency and good converted signals with negligible power penalties.

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Parameter	${GeO}_{2}$ -Doped HNLF
Nonlinear coefficient $γ$ ( ${km}^{- 1} W^{- 1}$ )	10.8
Fiber length L (km)	0.25
Loss $α$ (dB/km)	0.8
Zero dispersion wavelength $λ_{0}$ (nm)	1544
Dispersion slope ( $ps / km / {nm}^{2}$ )	0.006
SL( $W \cdot m$ )	18
SBS $threshold \cdot effective length \cdot nonlinear$ coefficient $γ$ (rad)	0.1944

Parameter	Al-Doped HNLF
Nonlinear coefficient $γ$ ( ${km}^{- 1} W^{- 1}$ )	6.9
Fiber length L (km)	0.25
Loss $α$ (dB/km)	6.2
Zero dispersion wavelength $λ_{0}$ (nm)	1550
Dispersion slope ( $ps / km / {nm}^{2}$ )	0.024
SL ( $W \cdot m$ )	86
SBS $threshold \cdot effective length \cdot nonlinear$ coefficient $γ$ (rad)	0.5934

Parameter	Al-Doped HNLF1	${GeO}_{2}$ -Doped HNLF2
Nonlinear coefficient $γ$ ( ${km}^{- 1} W^{- 1}$ )	6.9	10.8
Fiber length L (km)	0.15	0.1
Loss $α$ (dB/km)	6.2	0.8
Zero dispersion wavelength $λ_{0}$ (nm)	1550	1544
Dispersion slope ( $ps / km / {nm}^{2}$ )	0.024	0.006
SL( $W \cdot m$ )	86	18
SBS $threshold \cdot effective length \cdot$ nonlinear coefficient $γ$ (rad)	0.5934	0.1944

Fiber	CE(dB)
250-m ${GeO}_{2}$ -doped HNLF	−14.63
250-m Al-doped HNLF	−6.84
100 m ${GeO}_{2}$ -doped HNLF2+150-m Al-doped HNLF1	−10.99
150-m Al-doped HNLF1 + 100 m ${GeO}_{2}$ -doped HNLF2	−3.1

Parameter	${GeO}_{2}$ -Doped HNLF
Nonlinear coefficient $γ$ ( ${km}^{- 1} W^{- 1}$ )	10.8
Fiber length L (km)	0.25
Loss $α$ (dB/km)	0.8
Zero dispersion wavelength $λ_{0}$ (nm)	1544
Dispersion slope ( $ps / km / {nm}^{2}$ )	0.006
SL( $W \cdot m$ )	18
SBS $threshold \cdot effective length \cdot nonlinear$ coefficient $γ$ (rad)	0.1944

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Applied Optics