Self-phase modulation and spectral broadening of optical pulses in semiconductor laser amplifiers

Agrawal, Govind P.; Olsson, N.A.

doi:10.1109/3.42059

Cited by 1,049 publications

(528 citation statements)

References 24 publications

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“…To describe the time-dependent semiconductor SA response we use the Agrawal/Olsson model [28], which we term noninstantaneous SA response and is given by…”

Section: Modelsmentioning

confidence: 99%

Discrete family of dissipative soliton pairs in mode-locked fiber lasers

et al. 2009

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We numerically investigate the formation of soliton pairs (bound states) in mode-locked fiber ring lasers. In the distributed model (complex cubic-quintic Ginzburg-Landau equation) we observe a discrete family of soliton pairs with equidistantly increasing peak separation. This family was identified by two alternative numerical schemes and the bound state instability was disclosed by a linear stability analysis. Moreover, similar families of unstable bound state solutions have been found in a more realistic lumped laser model with an idealized saturable absorber (instantaneous response). We show that a stabilization of these bound states can be achieved when the finite relaxation time of the saturable absorber is taken into account. The domain of stability can be controlled by varying this relaxation time.

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“…To describe the time-dependent semiconductor SA response we use the Agrawal/Olsson model [28], which we term noninstantaneous SA response and is given by…”

Section: Modelsmentioning

confidence: 99%

Discrete family of dissipative soliton pairs in mode-locked fiber lasers

et al. 2009

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“…Moreover, the original signal wavelength can be fully preserved while producing optical delays; nevertheless the phase information is lost in the process, meaning that the technique remains restricted to pure amplitude-based modulation coding (ASK) and to digital signals only. It must be pointed out that the signal spectrum can be moderately altered by a possible chirp effect while switching to gain saturation in the SOAs [16]. Even though a real data stream was not used for this demonstration it looks quite evident that this scheme is very immune to the actual time ordering of the bit sequence if the probe intensity is kept sufficiently low in the XGM process.…”

Section: Discussionmentioning

confidence: 99%

Wideband delays generated in an all-optical tunable delay line, preserving signal wavelength and bandwidth

Thévenaz

Chin

2009

Comptes Rendus. Physique

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A novel technique to produce large all-optically controlled tunable delays of 100 ps pulse train in optical fibers is demonstrated. The configuration of the delay line basically consists of two main stages: the wavelength conversion via semiconductor optical amplifiers and the group velocity delaying via a dispersive optical medium. The wavelength-converted signal was precisely delayed over a wide temporal range from picoseconds to nanoseconds using a dispersive fiber, preserving the wavelength and the bandwidth of the signal. 100 ps FWHM signal pulses were delayed continuously up to 14 ns with moderate pulse distortion, corresponding to a 140-bit delay.

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“…When the T d = 5 ps, the pedestal energy has the least value. These performances can be explained: after the Gaussian signal pulse is amplified, the chirp of the amplified signal pulse by the SOA increases almost linearly over the central part of the pulse [21]. Such a linear chirp implies that the pulse can be compressed in a dispersion medium such as an optical fiber if it experiences anomalous group velocity dispersion during its propagation in that medium.…”

Section: Designed Model and Theorymentioning

confidence: 99%

“…where dn/dN is the index with the carrier density variation, dg/dN is the gain with the carrier density variation, λ s is the wavelength of the signal pulse, ∆L is the length of each section, P j−1 is the output power of the (j − 1)th section, g(N j ) is the gain described by [21] …”

Section: Designed Model and Theorymentioning

confidence: 99%

A Designed Model About Amplification and Compression of Picosecond Pulse Using Cascaded Soa and Nolm Device

Wu¹,

Tian²,

Bao³

2007

PIER

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Abstract-A novel technique for the amplification and the compression of an optical pulse is proposed. Based on cascaded a semiconductor optical amplifier (SOA) and a nonlinear optical loop mirror (NOLM), the chirping effect induced by the SOA and the cross phase modulation effect between the signal pulse and control pulse can be utilized to shape the pulse. The picosecond pulse amplification and compression are demonstrated in this paper. A good theoretical model is designed with optimal parameters. Results show that the output signal pulse with high peak power, narrow pulse width, and low pedestal can be obtained using the designed model, which is suited for furture 640 Gbps optical communications. 128Wu, Tian, and Bao

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Self-phase modulation and spectral broadening of optical pulses in semiconductor laser amplifiers

Cited by 1,049 publications

References 24 publications

Discrete family of dissipative soliton pairs in mode-locked fiber lasers

Discrete family of dissipative soliton pairs in mode-locked fiber lasers

Wideband delays generated in an all-optical tunable delay line, preserving signal wavelength and bandwidth

A Designed Model About Amplification and Compression of Picosecond Pulse Using Cascaded Soa and Nolm Device

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