20 dB net-gain polarization-insensitive fiber optical parametric amplifier with >2 THz bandwidth

Stephens, M.F.C., Gordienko, V. and Doran, N.J. (2017). 20 dB net-gain polarization-insensitive fiber optical parametric amplifier with >2 THz bandwidth. Optics Express, 25 (9), pp. 10597-10609.

Abstract

A black-box polarization insensitive fiber optical parametric amplifier (PI-FOPA) is characterized for the first time using a commercial 127 Gb/s polarization-division multiplexed PDM-QPSK transponder within a multiplex of twenty-two equivalent DWDM signals across a 2.3 THz bandwidth portion of the C-band. The PI-FOPA employs a recently demonstrated diversity loop arrangement comprising two lengths of highly nonlinear fiber (HNLF) with the parametric pump being removed after the first HNLF in both directions about the loop. This arrangement is named the Half-Pass Loop FOPA or HPL-FOPA. In total, a record equivalent 2.3 Tb/s of data is amplified within the HPL-FOPA for three different pump power regimes producing net-gains of 10 dB, 15 dB and 20 dB (averaged over all signals). For the latter two regimes, the gain bandwidth is observed to extend considerably beyond the C-band, illustrating the potential for this design to amplify signals over bandwidths commensurate with the EDFA and beyond. Under the 15 dB gain condition, the average OSNR penalty to achieve 10−3 bit error rate for all twenty three signals was found to be 0.5 ± 0.3 dB. Worst case penalty was 0.8 ± 0.3 dB, verifying the use of the architecture for polarization insensitive operation. The growth of four-wave mixing signal-signal crosstalk is additionally characterized and found to be gain independent for a fixed output power per signal. A simple effective length model is developed which predicts this behavior and suggests a new configuration for significantly reduced crosstalk.

Publication DOI: https://doi.org/10.1364/OE.25.010597
Dataset DOI: https://doi.org/10.17036/researchdata.aston.ac.uk.00000204
Divisions: Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Engineering & Applied Sciences > Aston Institute of Photonics Technology
Additional Information: © 2017 Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited. Funding: EPSRC (EP/M005283/1 and II-VI for CASE studentship)
Uncontrolled Keywords: Fiber optics amplifiers and oscillator,Fiber optics communications,Nonlinear optics, parametric processes,Atomic and Molecular Physics, and Optics
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
Published Date: 2017-05-01
Authors: Stephens, M.F.C. ( 0000-0002-6533-1893)
Gordienko, V. ( 0000-0002-9141-828X)
Doran, N.J.

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