The Experts below are selected from a list of 21225 Experts worldwide ranked by ideXlab platform
Curtis R. Menyuk - One of the best experts on this subject based on the ideXlab platform.
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Dispersion Management in a harmonically mode-locked fiber soliton laser.
Optics letters, 2000Co-Authors: Thomas F. Carruthers, Irl N. Duling, Moshe Horowitz, Curtis R. MenyukAbstract:Harmonically mode-locked Er-fiber soliton lasers have become a reliable source of high-repetition-rate picosecond pulses in high-speed communications and photonic analog-to-digital conversion systems because of their low-noise, dropout-free operation. We have fabricated such a laser with a strongly Dispersion-managed cavity and modeled its operation, and we have found that Dispersion Management significantly extends the power range over which uninterrupted single-pulse production is attained and dramatically decreases the effects of amplified spontaneous emission on the phase noise of the laser. OCIS codes: 140.3510, 140.4050, 140.3430, 060.5530, 060.7140, 320.7090.
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Circulating Loop Experiments on Solitons with Periodic Dispersion Management
Solid-State Science and Technology Library, 1998Co-Authors: J. M. Jacob, Gary M. Carter, Curtis R. MenyukAbstract:We characterize the performance of long-haul 10 Gbit/s optical communication systems using stationary optical band-pass filters and periodic Dispersion Management. We have found for low values of path-averaged Dispersion in a strong Dispersion-managed system the pulse energy and dynamics are practically independent of path-averaged Dispersion.
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Periodic Dispersion Management in soliton wavelength-division multiplexing transmission with sliding filters.
Optics letters, 1997Co-Authors: E.a. Golovchenko, A. N. Pilipetskii, Curtis R. MenyukAbstract:We compare the performance of Dispersion-managed fibers with that of Dispersion-decreasing fibers and of fibers with uniform Dispersion in filtered soliton wavelength-division multiplexing transmission. Alternating-sign Dispersion Management allows us to achieve values of collision-induced timing jitter that are comparable with what can be achieved by use of Dispersion-decreasing fiber and are lower for some parameter values.
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Collision-induced timing jitter reduction by periodic Dispersion Management in soliton WDM transmission
Electronics Letters, 1997Co-Authors: E.a. Golovchenko, A. N. Pilipetskii, Curtis R. MenyukAbstract:The authors propose to use Dispersion Management to reduce collision-induced timing jitter in soliton WDM transmission. The performance of Dispersion-managed fibres is compared numerically to Dispersion-decreasing and uniform Dispersion fibres with up to eight channels, and it is shown that Dispersion Management can provide the best performance.
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Dispersion Management in an actively modelocked fiber laser with Kerr nonlinearity
Technical Digest. Summaries of papers presented at the Conference on Lasers and Electro-Optics. Postconference Edition. CLEO '99. Conference on Lasers, 1Co-Authors: M. Horowitz, Curtis R. Menyuk, Thomas F. Carruthers, I.n. DulingAbstract:Summary form only given. Fiber lasers that are used in optical communication systems should generate a train of pulses with high repetition rate and low pulse dropout. Recently, an actively modelocked laser that generates a stable train of short pulses with a repetition rate of 10 GHz and pulse dropout of less than 10/sup -12/ was demonstrated. Dispersion Management was used in the cavity of the laser. In the work we analyze the laser reported previously and demonstrate excellent agreement between the theory and the experiment. The behavior of this laser is compared theoretically to that of a laser with a uniform Dispersion map. The use of Dispersion Management in actively modelocked lasers which operate in high harmonic mode was found to significantly increase the range of pulse durations over which stable operation can be achieved. Therefore, Dispersion Management decreases the minimum pulse width below the basic limitation imposed on lasers with a uniform Dispersion map by the growth of continuum due to the finite gain bandwidth. In previous work, Dispersion Management or stretched-pulse additive pulse modelocking in passively modelocked fiber lasers was used in order to increase the pulse energy and improve the laser performance.
Dietmar Kracht - One of the best experts on this subject based on the ideXlab platform.
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Ultrafast, stretched-pulse thulium-doped fiber laser with a fiber-based Dispersion Management.
Optics letters, 2012Co-Authors: Andreas Wienke, Frithjof Haxsen, Dieter Wandt, Uwe Morgner, Jörg Neumann, Dietmar KrachtAbstract:An ultrafast thulium-doped fiber laser with stretched-pulse operation has been realized and investigated. The passively mode-locked oscillator emitted 119 fs pulses at a peak wavelength of 1912 nm. A normal-Dispersion fiber with a high numerical aperture and small core was used for intracavity Dispersion Management and external compression. Numerical simulations were performed and are in good agreement with the experimental results.
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Stretched-pulse operation of a thulium-doped fiber laser with a fiber-based Dispersion Management
Conference on Lasers and Electro-Optics 2012, 2012Co-Authors: Andreas Wienke, Frithjof Haxsen, Dieter Wandt, Uwe Morgner, Jörg Neumann, Dietmar KrachtAbstract:A normal-Dispersion fiber was used for Dispersion Management in an ultrafast thulium-doped fiber laser. The laser provided pulse durations below 130 fs with an external pulse compression. The experimental results could be numerically verified.
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Photonic bandgap fiber for Dispersion Management of similaritons around 1 μm
2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference, 2006Co-Authors: Axel Ruehl, Dieter Wandt, Oliver Prochnow, Carsten Fallnich, Dietmar KrachtAbstract:We report on the use of a photonic bandgap fiber for Dispersion Management of similaritons. The possibility of an all-fiber similariton laser is discussed by comparing the experimental results to a grating compressor.
Yuji Kodama - One of the best experts on this subject based on the ideXlab platform.
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Optimal Dispersion Management for a wavelength division multiplexed optical soliton transmission system
Journal of Lightwave Technology, 1999Co-Authors: Hiroto Sugahara, Takashi Inoue, Akihiro Maruta, H. Kato, Yuji KodamaAbstract:Soliton's frequency shift arising from the pulse collision between wavelength division multiplexed (WDM) channels in an optical transmission line may be reduced by Dispersion Management technique. The reduction mechanism is due to a cancellation between the shifts in normal and anomalous Dispersion fibers. With a proper Management of the Dispersion, the effect of lumped amplifiers on the frequency shift may also be canceled out. In this paper, we give a detailed analysis of the frequency shift in Dispersion managed systems, and explain the reduction mechanism of the shift. We then propose optimal Dispersion Management schemes by means of minimizing the frequency shift. We also present a statistical analysis of the collision induced timing jitter for a two-channel WDM system.
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Optimal Dispersion Management for wavelength-division-multiplexed RZ optical pulse transmission
Electronics Letters, 1998Co-Authors: Hiroto Sugahara, Takashi Inoue, Akihiro Maruta, Yuji KodamaAbstract:The frequency shift induced by cross-phase modulation between different channels can be reduced by Dispersion Management in a wavelength-division-multiplexed (WDM) optical transmission system in RZ format. The reduction is increased for larger Dispersion difference in a lossless two-step Dispersion managed line. However, in the presence of fibre loss and lumped amplifiers, the frequency shift tends to increase for a large Dispersion difference in which a stable pulse with the same initial pulsewidth requires higher enhanced power than for the lossless case. Optimal Dispersion Management schemes in WDM systems are also proposed.
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Optimal design of Dispersion Management for a soliton–wavelength-division-multiplexed system
Optics letters, 1997Co-Authors: Yuji Kodama, Akihiro MarutaAbstract:We obtain analytical formulas for minimizing chirp and timing jitter that lead to optimal designs for a soliton–wavelength-division-multiplexed system with Dispersion Management and lumped amplifiers. The method used here is the guiding-center theory, from which we obtain a stationary pulse shape (guiding-center soliton) that has enhanced power and an increased time–bandwidth product compared with those of a soliton alone.
Nick Doran - One of the best experts on this subject based on the ideXlab platform.
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Soliton interaction in optical communication systems with short-scale Dispersion Management
Conference on Lasers and Electro-Optics (CLEO 2000). Technical Digest. Postconference Edition. TOPS Vol.39 (IEEE Cat. No.00CH37088), 2000Co-Authors: S.k. Turitsyn, Nick Doran, M.p. FedorukAbstract:Summary form only given. High-capacity wave-division-multiplexing (WDM) data transmission requires dense packing of the carrier signal both in time and in frequency domains. Then intersymbol and interchannel interactions become the main detrimental factors limiting data transmission. The Dispersion-Management (DM) technique allows the increase of bit-rate per channel and the suppression of interchannel interaction in WDM systems in comparison with the conventional soliton transmission. Traditional Dispersion Management for long-haul transmission assumes amplification distance to be much shorter than the Dispersion compensation period. Existing technologies make it possible to manufacture fiber with the continuous alternation of positive and negative Dispersion sections of few a kilometers long without any splicing. Short-scale Dispersion Management is a means of controlling the DM soliton energy whilst keeping the average Dispersion not too small and taking advantage of four-wave-mixing (FWM) suppression in WDM transmission by high local Dispersion. The fundamental properties of optical signal transmission in this regime are not yet well studied. We present path-average theory and examine DM soliton interaction in fiber systems with short-scale Dispersion Management.
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Dispersion-Management in fiber communication lines using Raman amplification
Optics Communications, 1999Co-Authors: M.p. Fedoruk, Wladek Forysiak, Nick DoranAbstract:We propose a Dispersion Management scheme combined with Raman amplification that supports strongly confined optical pulses with potential applications in ultra-high speed single-channel optical communication systems.
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40 Gbit/s RZ transmission over more than 2000 km of standard fibre with Dispersion Management
IEE Colloquium on High Speed and Long Distance Transmission, 1999Co-Authors: D S Govan, Wladek Forysiak, Nick DoranAbstract:Dispersion Management has been used successfully in several experiments to transmit data at 10 Gbit/s and 40 Gbit/s over standard fibre. Dispersion Management is particularly useful for this problem as the installed standard fibre has a high Dispersion at 1.5 /spl mu/m. In order to operate at high data rates at this wavelength it is useful to lower the average Dispersion by using a length of Dispersion compensating fibre. A novel Dispersion map is used to transmit data at a rate of 40 Gbit/s in a standard fibre. Using numerical modelling we show that it is possible to transmit data at 40 Gbit/s over more than 2000 km of standard fibre using quasi-linear pulses.
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Soliton collisions with wavelength-division multiplexed systems with strong Dispersion Management.
Optics letters, 1998Co-Authors: A. M. Niculae, Wladek Forysiak, A. Gloag, Jeroen Nijhof, Nick DoranAbstract:We investigate collisions between solitons in a lossless two-channel wavelength-division multiplexed system with strong Dispersion Management. Numerical results show that the net frequency shift that is due to interchannel collisions is at least 1 order of magnitude smaller than predicted by adiabatic theories. A modified theoretical analysis is presented and shown to be in good agreement with the numerical results.
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Modulational instabilities in fibers with periodic Dispersion Management.
Optics letters, 1996Co-Authors: N.j. Smith, Nick DoranAbstract:We analytically and numerically analyze the occurrence of modulational instability in fibers with periodic changes in the group-velocity Dispersion. For small variations, a set of resonances occurs in the gain spectrum. However, large Dispersion variations eliminate these resonances and restrict the bandwidth of the fundamental gain spectrum. This research has been motivated by the adoption of Dispersion Management techniques in long-haul optical communications.
Akihiro Maruta - One of the best experts on this subject based on the ideXlab platform.
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Optimal Dispersion Management for a wavelength division multiplexed optical soliton transmission system
Journal of Lightwave Technology, 1999Co-Authors: Hiroto Sugahara, Takashi Inoue, Akihiro Maruta, H. Kato, Yuji KodamaAbstract:Soliton's frequency shift arising from the pulse collision between wavelength division multiplexed (WDM) channels in an optical transmission line may be reduced by Dispersion Management technique. The reduction mechanism is due to a cancellation between the shifts in normal and anomalous Dispersion fibers. With a proper Management of the Dispersion, the effect of lumped amplifiers on the frequency shift may also be canceled out. In this paper, we give a detailed analysis of the frequency shift in Dispersion managed systems, and explain the reduction mechanism of the shift. We then propose optimal Dispersion Management schemes by means of minimizing the frequency shift. We also present a statistical analysis of the collision induced timing jitter for a two-channel WDM system.
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Optimal Dispersion Management for wavelength-division-multiplexed RZ optical pulse transmission
Electronics Letters, 1998Co-Authors: Hiroto Sugahara, Takashi Inoue, Akihiro Maruta, Yuji KodamaAbstract:The frequency shift induced by cross-phase modulation between different channels can be reduced by Dispersion Management in a wavelength-division-multiplexed (WDM) optical transmission system in RZ format. The reduction is increased for larger Dispersion difference in a lossless two-step Dispersion managed line. However, in the presence of fibre loss and lumped amplifiers, the frequency shift tends to increase for a large Dispersion difference in which a stable pulse with the same initial pulsewidth requires higher enhanced power than for the lossless case. Optimal Dispersion Management schemes in WDM systems are also proposed.
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Optimal design of Dispersion Management for a soliton–wavelength-division-multiplexed system
Optics letters, 1997Co-Authors: Yuji Kodama, Akihiro MarutaAbstract:We obtain analytical formulas for minimizing chirp and timing jitter that lead to optimal designs for a soliton–wavelength-division-multiplexed system with Dispersion Management and lumped amplifiers. The method used here is the guiding-center theory, from which we obtain a stationary pulse shape (guiding-center soliton) that has enhanced power and an increased time–bandwidth product compared with those of a soliton alone.