Strong picosecond optical pulse propagation in semiconductor optical amplifiers at transparency

Tang, J. M.; Shore, K.A.

doi:10.1109/3.687871

Cited by 120 publications

(42 citation statements)

References 29 publications

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“…In the case of linearly chirped Gaussian pulses, the incident complex amplitude can be written as (19) where is the input pulse energy, is related to input pulse FWHM by , and is the chirp parameter. In subpicosecond regime, for the chirped pulses, the pulse spectrum width becomes comparable to gain spectrum width of the SOA.…”

Section: B Counterpropagation Simulationsmentioning

confidence: 99%

“…The relevant effects that have to be considered in picosecond pulse amplification in an SOA model are interband (slow) gain dynamics [13], interband refractive index dynamics [14], carrier heating (CH) and spectral hole burning (SHB) [15], [16], twophoton absorption (TPA), ultrafast nonlinear refraction (UNR) [17]- [19], gain dispersion [20], gain peak shift with carrier density [21], [22], and group velocity dispersion (GVD) [23]. One should account for these effects to have a comprehensive reliable model in order to determine and understand the SOA high-speed dynamics, especially in terms of response times and optimizing SOA parameters for all-optical signal processing applications.…”

Section: Introductionmentioning

confidence: 99%

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Comprehensive Finite-Difference Time-Dependent Beam Propagation Model of Counterpropagating Picosecond Pulses in a Semiconductor Optical Amplifier

Razaghi

Ahmadi

Connelly

2009

J. Lightwave Technol.

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Abstract-In this paper, we present a numerical model to study counter pulse propagation in semiconductor optical amplifiers. An improved finite-difference beam propagation method for solving the modified nonlinear Schrödinger equation is applied for the first time in the counterpropagation regime. In our model, group velocity dispersion, two-photon absorption, ultrafast nonlinear refraction, and the change in the gain peak wavelength with carrier density are included, which have not been considered simultaneously in previous counterpropagation models. The model is applied to demonstrate how a subpicosecond and picosecond probe pulse shape and spectrum can be modified by a counterpropagating pump pulse. Based on the results obtained by this model, while subpicosecond probe pulses can be compressed by in this scheme, their time-bandwidth product are also improved significantly. Furthermore, the effects of several parameters are analyzed to obtain the proper probe spectral peak shift using counterpropagating probe pulses. The accuracy and computational efficiency of the new scheme are assessed through numerical examples and are shown to be superior to previously published approaches.Index Terms-Counterpropagation, pulse shaping, semiconductor optical amplifier, ultrafast nonlinear effects.

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Section: B Counterpropagation Simulationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comprehensive Finite-Difference Time-Dependent Beam Propagation Model of Counterpropagating Picosecond Pulses in a Semiconductor Optical Amplifier

Razaghi

Ahmadi

Connelly

2009

J. Lightwave Technol.

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“…The dynamics of f c is governed by a rate equation for electron-temperature T c . The temperature rate equations can be deduced from DMEs and are extended to include the terms of free-carrier absorption (FCA) and TPA (Tang and Shore 1998). The CH effect results from the competition between the carrier heating (induced by the stimulated emission, FCA and TPA) and carrier cooling (due to carrier-phonon scattering with a time constants τ hc ) towards the lattice temperature T L (set as 300 K).…”

Section: Theory Modelmentioning

confidence: 99%

Wavelength dependent ultrafast gain and phase dynamics in bulk SOAs over wide gain region

Wang

Huang

2009

Opt Quant Electron

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Based on the semiclassical density-matrix equations, ultrafast probe gain and phase dynamics in bulk semiconductor optical amplifiers excited by a 200 fs Gaussian pump pulse centered at 1,558 nm are numerically investigated and compared over a wide material gain region (1,460-1,650 nm). It is predicted that the recovery time of phase may be longer or shorter than that of gain depending on probe wavelengths. Besides, as functions of probe wavelength, the dynamic gain range and the dynamic phase range have different shapes. Moreover, the wavelength dependence of phase recovery overshoot is illustrated. At last, the probe chirp dynamics and the wavelength dependence of the chirp characteristics are described. These interesting features result from a restriction of the Kramers-Kronig relations and different ways of the competition or cooperation among the effects of spectralhole burning, carrier heating and two-photon absorption on subpicosecond timescale over the whole concerned band.

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“…While the SOA length has little effect on the SMZ geometry, the minimum achievable switching windows for both the TOAD and CPMZ are constrained by the length of the SOAs [7,8]. Many theoretical models have been developed to understand the ultrafast temporal response of SOAs [27,[30][31][32] and the characteristics of these optical switches [7][8][9][10][11].…”

Section: ¥ § ¦mentioning

confidence: 99%

Ultra-High Capacity Networking Enabled By Optical Technologies

Personick¹

2003

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REPORT DOCUMENTATION PAGEForm Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302, and to the Office of Management and Budget, Paperwork Reduction Project (0704-0188), Washington, DC 20503 AGENCY USE ONLY (Leave blank)2. REPORT DATE AUGUST 2003 REPORT TYPE AND DATES COVEREDFinal Nov 99 -Sep 02 TITLE AND SUBTITLE ULTRA-HIGH CAPACITY NETWORKING ENABLED BY OPTICAL TECHNOLOGIES AUTHOR(S)Stewart Personick FUNDING NUMBERSC -F30602-00-2-0501 PE -62110E PR -J181 TA -23 WU -01 PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)Drexel University 3141 Chestnut Street Philadelphia Pennsylvania 19104 PERFORMING ORGANIZATION REPORT NUMBERN/A SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES)Defense 12b. DISTRIBUTION CODE ABSTRACT (Maximum 200 Words)Project Pegasus, as this project came to be called, consisted of collaborative work in the following four areas: exploration of a novel internet protocol packet router using waveguide grating router devices; research into next generation internet backbone networks that are scalable by 1000 time the aggregate capacity of current internet backbone networks; development of applications requiring very high speed networking that enable leading edge research; and finally the design and demonstration of an all optical regenerator based upon terahertz optical asymmetric demultiplexes. NUMBER OF PAGES REFERENCES (GROUPED BYREPORT AcknowledgementThe researchers who contributed to Project Pegasus wish to thank the Defense Advanced Research Projects Agency (DARPA) and the Air Force Research Laboratory for their support of this research. In particular, we wish to thank Dr. Mari Maeda who led the Next Generation Internet initiative at DARPA, and who sponsored and guided this research.The researchers also wish to thank their respective universities and firms for providing their support.1 A. Executive Summary / IntroductionProject Pegasus (Ultra-High Capacity Networking Enabled by Optical Technologies) is a research program that was conducted from September 1999 to September 2002. It was sponsored by DARPA under the DARPA Next Generation Internet initiative, and funded under a contract to Drexel University from the US Air Force Research Laboratory.There are four (4) major components of Project Pegasus:The construction and demonstration of proof-of-concept-viability of a novel approach for constructing ultra-high-capacity Internet protocol, IP, packet routers using a passive optical device called a waveguide grating router, WGR.The exploration and creation of tec...

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Strong picosecond optical pulse propagation in semiconductor optical amplifiers at transparency

Cited by 120 publications

References 29 publications

Comprehensive Finite-Difference Time-Dependent Beam Propagation Model of Counterpropagating Picosecond Pulses in a Semiconductor Optical Amplifier

Comprehensive Finite-Difference Time-Dependent Beam Propagation Model of Counterpropagating Picosecond Pulses in a Semiconductor Optical Amplifier

Wavelength dependent ultrafast gain and phase dynamics in bulk SOAs over wide gain region

Ultra-High Capacity Networking Enabled By Optical Technologies

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