| 1. |
- Olsson, Samuel L I, 1984, et al.
(author)
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Phase-Sensitive Amplified Optical Link Operating in the Nonlinear Transmission Regime
- 2012
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In: 38th European Conference on Optical Communication and Exhibition, ECOC 2012, Amsterdam, 16-20 September 2012.
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Conference paper (peer-reviewed)abstract
- We characterize a phase-sensitive amplifier (PSA) after an 80km fiber span, carrying a single DQPSK channel in the nonlinear transmission regime. The system penalty with increasing intrachannel nonlinear distortion is similar for EDFA and PSA based systems, indicating that the PSA sensitivity advantage remain with nonlinear transmission.
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| 2. |
- Corcoran, William, 1983, et al.
(author)
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All-optical signal processing using slow light enhanced nonlinearities in silicon waveguides
- 2011
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In: 2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference, CLEO EUROPE/EQEC 2011; Munich; 22 May 2011 through 26 May 2011. - 9781457705335
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Conference paper (peer-reviewed)abstract
- Nonlinear optical processes utilizing the ultrafast Kerr (ξ (3) ) nonlinearity provide a tool to manipulate short, picosecond long optical pulses [1], of interest for high baud rate serial communications. Increasing the nonlinear response of waveguides allows for more compact and potentially more efficient all-optical devices, with many device demonstrations in high index, highly nonlinear materials, such as silicon [2] . Further enhancing the nonlinear response of waveguides can be achieved by using resonant structures to increase the energy density, however demonstrations of signal processing using these structures have been limited to bandwidths of a few 10s of GHz at most (e.g. [3]). © 2011 IEEE.
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| 3. |
- Corcoran, William, 1983, et al.
(author)
-
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 ; 2013:622 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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| 4. |
- 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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| 5. |
- Corcoran, William, 1983, et al.
(author)
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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.
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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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| 6. |
- Corcoran, William, 1983, et al.
(author)
-
Single-photodiode per polarization receiver with signal-signal beat interference suppression through heterodyne detection
- 2018
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In: Optics Express. - 1094-4087 .- 1094-4087. ; 26:3, s. 3075-3086
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Journal article (peer-reviewed)abstract
- We show that a simplified, single-photodiode per polarization heterodyne receiver is able to directly suppress signal-signal beat interference (SSBI), without the need for cancellation in the digital domain. We characterize performance degradation due to SSBI, and show that a strong LO in the receiver can mitigate SSBI. Transmission of 400 Gb/s-class signals is shown over single fiber spans of up to 160 km, and over field-deployed metropolitan area fiber. These results indicate that a single photodiode can be used to receive complex optical signals in high speed fiber systems without the need for SSBI cancellation in the digital domain.
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| 7. |
- Foo, Benjamin, 1991, et al.
(author)
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Distributed Nonlinear Compensation Using Optoelectronic Circuits
- 2018
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In: Journal of Lightwave Technology. - 0733-8724 .- 1558-2213. ; 36:6, s. 1326-1339
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Journal article (peer-reviewed)abstract
- This paper investigates the use of optoelectronic subsystems placed all the way along a fiber link to provide distributed mitigation of the distortion caused by the Kerr nonlinearity. These subsystems use power -dependent phase modulation to mitigate the low-frequency ( < 1 GHz) components of the self-phase modulation and cross-phase modulation (XPM) distortion experienced by several wavelength channels simultaneously. Furthermore, this technique compensates the nonlinear distortion on a per-span basis, and so can mitigate XPM in optically routed links, unlike transmitter- or receiver-side nonlinearity compensation techniques. We present proof-of-concept results from both experimental and numerical studies that show our optoelectronic technique can effectively mitigate the distortion caused by fiber nonlinearity. Additional simulations study the impact of various link parameters on the effectiveness of this scheme.
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| 8. |
- Jignesh, Jokhakar, et al.
(author)
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Polarization independent optical injection locking for carrier recovery in optical communication systems
- 2017
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In: Optics Express. - 1094-4087 .- 1094-4087. ; 25:18, s. 21216-21228
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Journal article (peer-reviewed)abstract
- An optical injection locking (IL) system that is independent of the incoming signal's polarization is demonstrated for carrier recovery in coherent optical communication systems. A sub-system that enables polarization independence is discussed and experimentally verified. The system is tested over a 20-km test field link using a broadlinewidth laser (40 MHz), and shows the suppression of phase noise when using the carrier recovered by injection locking as the local oscillator.
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| 9. |
- Lundström, Carl Peter, 1982, et al.
(author)
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Fiber optic parametric amplifier with 10-dB net gain without pump dithering
- 2013
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In: IEEE Photonics Technology Letters. - 1041-1135 .- 1941-0174. ; 25:3, s. 234-237
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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)
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Fiber-optic parametric amplifiers without pump dithering
- 2013
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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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