| 1. |
- Corcoran, William, 1983, et al.
(author)
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Mitigation of Nonlinear Impairments on QPSK Data in Phase-Sensitive Amplified Links
- 2013
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In: 39th European Conference on Optical Communication and Exhibition, ECOC 2013, London, 22-26 September 2013. - : Institution of Engineering and Technology. - 9781849197595 ; :622 CP, s. 486-488
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Conference paper (peer-reviewed)abstract
- We investigate the mitigation of nonlinear impairments via phase-sensitive amplification. We show in simulation and experiment that this effect can be optimized through engineering link dispersion. A phase-sensitive amplified link is measured to reduce nonlinear penalties by over 3dB compared to a phase-insensitive amplified link.
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| 2. |
- Corcoran, William, 1983, et al.
(author)
-
Noise beating in hybrid phase-sensitive amplifier systems
- 2014
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In: Optics Express. - : The Optical Society. - 1094-4087 .- 1094-4087. ; 22:5, s. 5762-5771
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Journal article (peer-reviewed)abstract
- We investigate the effect of noise loading in a hybrid phase-sensitive amplifier system, analyzing the effect of noise beating between the signal and idler waves coupled in a parametric amplifier. Through analyzing input and output optical signal to noise ratios, we find that system performance of a phase-sensitive amplifier is 3 to 6 dB improved over a phase-insensitive amplifier, depending on the ratio of loaded noise power to that of vacuum fluctuations. (C) 2014 Optical Society of America
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| 3. |
- Corcoran, William, 1983, et al.
(author)
-
Phase-Sensitive Optical Pre-Amplifier Implemented in an 80km DQPSK Link
- 2012
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In: Optics InfoBase Conference Papers. - Washington, D.C. : OSA. - 2162-2701.
-
Conference paper (peer-reviewed)abstract
- We present the first demonstration of a phase-sensitive fiber optic parametric amplifier successfully implemented over an 80 km dispersion managed link. We measure 1.3 dB higher sensitivity with this amplifier system against a comparable conventional EDFA-based link.
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| 4. |
- Eliasson, Henrik, 1985, et al.
(author)
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Comparison between Coherent Superposition in DSP and PSA for Mitigation of Nonlinearities in a Single-span Link
- 2014
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In: European Conference on Optical Communication, ECOC 2014; Cannes; France; 21 September 2014 through 25 September 2014. - 9782954944401 ; , s. Art. no. 6964015-
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Conference paper (peer-reviewed)abstract
- An experimental comparison is made between nonlinearity mitigation through coherent superposition optically in a phase-sensitive amplifier and electrically in DSP. The improved nonlinear tolerance is quantified in terms of EVM with high received power and sensitivity with high launch power.
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| 5. |
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| 6. |
- Eliasson, Henrik, 1985, et al.
(author)
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Mitigation of nonlinear distortion in hybrid Raman/phase-sensitive amplifier links
- 2016
-
In: Optics Express. - 1094-4087 .- 1094-4087. ; 24:2, s. 888-900
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Journal article (peer-reviewed)abstract
- Hybrid systems combining distributed Raman amplification and phase-sensitive amplifiers (PSAs) are investigated in numerical simulations. We focus on the mitigation of fiber nonlinearities and the impact of the span power map which is also important in systems employing optical phase conjugation or phase-conjugated twin waves.We simulate multi-span PSA links with and without distributed Raman amplification and show that by including distributed Raman amplification, the transmission distance increases more at optimum launch power than in the linear regime. For a 5-channel WDM QPSK PSA-amplified system, we observe a transmission reach increase by a factor of 8.1 by including ideal distributed Raman amplification.
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| 7. |
- Eliasson, Henrik, 1985, et al.
(author)
-
Phase-sensitive amplifier link with distributed Raman amplification
- 2018
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In: Optics Express. - 1094-4087 .- 1094-4087. ; 26:16, s. 19854-19863
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Journal article (peer-reviewed)abstract
- We demonstrate long-haul transmission using a hybrid amplifier approach combining distributed Raman amplification and lumped phase-sensitive amplification. Aside from the well-known resulting SNR improvement, distributed Raman amplification is included in an effort to improve the nonlinearity mitigation capability of the phase-sensitive amplifiers. When changing from phase-insensitive operation to phase-sensitive operation in a link employing distributed Raman amplification, the transmission reach at BER = 10−3is increased from 15 to 44 spans of length 81 km while simultaneously increasing the optimal launch power by 2 dB.
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| 8. |
- Lorences Riesgo, Abel, 1987, et al.
(author)
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Quadrature demultiplexing using a degenerate vector parametric amplifier
- 2014
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In: Optics Express. - 1094-4087 .- 1094-4087. ; 22:24, s. 29424-29434
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Journal article (peer-reviewed)abstract
- We report on quadrature demultiplexing of a quadrature phase-shift keying (QPSK) signal into two cross-polarized binary phase-shift keying (BPSK) signals with negligible penalty at bit-error rate (BER) equal to 10−9. The all-optical quadrature demultiplexing is achieved using a degenerate vector parametric amplifier operating in phase-insensitive mode. We also propose and demonstrate the use of a novel and simple phase-locked loop (PLL) scheme based on detecting the envelope of one of the signals after demultiplexing in order to achieve stable quadrature decomposition.
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| 9. |
- Lundström, Carl Peter, 1982, et al.
(author)
-
Fiber optic parametric amplifier with 10-dB net gain without pump dithering
- 2013
-
In: IEEE Photonics Technology Letters. - 1041-1135 .- 1941-0174. ; 25:3, s. 234-237
-
Journal article (peer-reviewed)abstract
- We present a stimulated Brillouin Scattering (SBS)-suppressed fiber optic parametric amplifier/wavelength converter constructed from four highly nonlinear fiber pieces with applied strain gradients and separated by isolators. The effective total SBS threshold increase is about 11 dB, and a net parametric gain of 10 dB is obtained without any pump dithering.
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| 10. |
- Lundström, Carl Peter, 1982, et al.
(author)
-
Fiber-optic parametric amplifiers without pump dithering
- 2013
-
In: Optics InfoBase Conference Papers. - Washington, D.C. : OSA. - 2162-2701.
-
Conference paper (peer-reviewed)abstract
- We present passively stimulated Brillouin scattering-suppressed highly nonlinear fiber cascades, and use them to implement fiber-optic parametric amplifiers capable of up to 10 dB net parametric gain without pump dithering.
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