| 1. |
- Alic, N., et al.
(författare)
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Benefits of Joint Statistics in MLSD-Equalized Transmission
- 2009
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Ingår i: IEEE Photonics Technology Letters. - 1041-1135 .- 1941-0174. ; 21:8, s. 495-497
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Tidskriftsartikel (refereegranskat)abstract
- We experimentally investigate and quantify performance improvement, accounting for multiple bit intervals' joint statistics in filtered equalized on-off keying OC-192 fiber-optic links relying on Viterbi-algorithm-based sequence detection. We demonstrate that the penalty associated with narrow filtering can be alleviated for the most part with an appropriate detection approach.
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| 2. |
- Alic, N., et al.
(författare)
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Joint Statistics and MLSD in Filtered Incoherent High-Speed Fiber-Optic Communications
- 2010
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Ingår i: Journal of Lightwave Technology. - 0733-8724 .- 1558-2213. ; 28:10, s. 1564-1572
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, signal statistics and their utilization for detection in narrowly filtered equalized high-speed fiber-optic communications are investigated experimentally. Tradeoffs between log-likelihood metric applications and oversampling are covered in detail. It is, for the first time, demonstrated that performance loss in bandwidth-limited systems can be nearly fully recovered (to within 0.5 dB) by taking advantage of band-width-limitation-induced noise correlations and oversampling.
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| 3. |
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| 4. |
- Coles, J. B., et al.
(författare)
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Bandwidth-efficient phase modulation techniques for Stimulated Brillouin Scattering suppression in fiber optic parametric amplifiers
- 2010
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Ingår i: Optics Express. - 1094-4087 .- 1094-4087. ; 18:17, s. 18138-18150
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Tidskriftsartikel (refereegranskat)abstract
- Two novel bandwidth efficient pump-dithering Stimulated Brillouin Scattering (SBS) suppression techniques are introduced. The techniques employ a frequency-hopped chirp and an RF noise source to impart phase modulation on the pumps of a two pump Fiber Optical Parametric Amplifier (FOPA). The effectiveness of the introduced techniques is confirmed by measurements of the SBS threshold increase and the associated improvements relative to the current state of the art. Additionally, the effect on the idler signal integrity is presented as measured following amplification from a two pump FOPA employing both techniques. The measured 0.8 dB penalty with pumps dithered by an RF noise source, after accruing 160ps/nm of dispersion with 38 dB conversion gain in a two-pump FOPA is the lowest reported to date.
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| 5. |
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| 6. |
- Kylemark, Per, 1976, et al.
(författare)
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Impact of Pump Phase-Modulation on the Bit-Error Rate in Fiber-Optical Parametric-Amplifier-Based Systems
- 2007
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Ingår i: IEEE Photonics Technology Letters. - 1041-1135 .- 1941-0174. ; 19:2, s. 79-81
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Tidskriftsartikel (refereegranskat)abstract
- Pump phase-modulation is often needed to suppress stimulated Brillouin scattering in fiber-optical parametric amplifiers. We show that while this causes a gain variation with a corresponding Q-value penalty, the actual bit-error-rate degradation is not always significant. The findings are supported by experimental studies.
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| 7. |
- McKinstrie, Colin, et al.
(författare)
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Higher-capacity communication links based on two-mode phase-sensitive amplifiers
- 2011
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Ingår i: Optics Express. - 1094-4087 .- 1094-4087. ; 19:13, s. 11977-11991
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Tidskriftsartikel (refereegranskat)abstract
- Optical communication links are usually made with erbium-doped fiber amplifiers, which amplify the signal waves in a phase-insensitive (PI) manner. They can also be made with parametric fiber amplifiers, in which the signal waves interact with idler waves. If information is transmitted using only the signals, parametric amplifiers are PI and their noise figures are comparable to those of erbium amplifiers. However, transmitting correlated information in the signals and idlers, or copying the signals prior to transmission, allows parametric amplifiers to be phase-sensitive (PS), which lowers their noise figures. The information capacities of two-mode PS links exceed those of the corresponding PI links by 2 b/s-Hz.
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| 8. |
- Myslivets, E., et al.
(författare)
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1.56-μs continuously tunable parametric delay line for a 40-Gb/s signal
- 2009
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Ingår i: Optics Express. - 1094-4087 .- 1094-4087. ; 17:14, s. 11958-11964
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Tidskriftsartikel (refereegranskat)abstract
- Experimental demonstration of an all-fiber, all-optical continuously tunable delay line is reported. The 1.56-mu s delay with a record 62,400 time-delay bit-rate product was characterized for a 40-Gbps data channel. The result was enabled by parametric dispersion compensation with cascaded triple-conversion in highly-nonlinear fiber capable of continuous tuning over 39.5 nm.
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| 9. |
- Wiberg, Andreas, 1978, et al.
(författare)
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Idler chirp optimization in a pulse-pumped parametric amplifier
- 2013
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Ingår i: 2013 IEEE Photonics Society Summer Topical Meeting Series, PSSTMS 2013. - 9781467350600 ; , s. 159-160
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Konferensbidrag (refereegranskat)abstract
- A simple engineering rule for idler characteristic optimization in pulsed fiber optic parametric amplifiers operated in transparency is derived. The theoretical results are validated in both simulations and experiments.
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