Intensity modulation and chirp of 1.55-/spl mu/m multiple-quantum-well laser diodes: modeling and experimental verification

Czotscher, K.; Weisser, S.; Leven, A.; Rosenzweig, J.

doi:10.1109/2944.788424

Cited by 24 publications

(8 citation statements)

References 27 publications

(29 reference statements)

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“…Therefore, the threshold current and the frequency deviation of the laser will increase with DLTs, while the output power will decrease. Our results are in good agreement with the experimental and simulation results [6], [8].…”

Section: Numerical Results and Discussionsupporting

confidence: 95%

“…The seriousness of the chirping induced performance degradation increases with the transmission bit rate and can ultimately limit the performance of the optical communication systems [6]. Thus, to model the reliability of a directly modulated laser and to achieve higher bit rates, especially in recent years that the transmission rates have reached more than 40 Gb/s [7], it is important to estimate its chirp characteristic which relates to the carrier-dependence of the laser's linewidth enhancement factor and the density of deep level traps (DLTs).…”

mentioning

confidence: 99%

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Modeling the effects of DLTs and carrier transport on the turn-on delay, steady-state time and wavelength chirp of SCH-QW lasers

Gity

Ansari

2009

2009 7th International Conference on Information, Communications and Signal Processing (ICICS)

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In this paper we drive a numerical model for a separate confinement heterostructure quantum well (SCH-QW) laser, as one of the key elements of photonic communications systems and networks. The physical effects of Deep Level Traps (DLTs) and carrier transport on the threshold current, turn-on delay, steady state time, transient response and wavelength chirp of a SCH-QW laser are modeled by means of finite difference method. This numerical model calculates the time-dependent variations of optical output phase, photon density and carrier densities in the SCH layer and QW region, self-consistently. These equations are also coupled with the trap density equation. The exact carrier dependence of the linewidth enhancement factor and the gain function for the QW laser are included.Index Terms-numerical modeling, quantum well (QW) laser, carrier transport, deep level traps, wavelength chirp.

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Section: Numerical Results and Discussionsupporting

confidence: 95%

mentioning

confidence: 99%

Modeling the effects of DLTs and carrier transport on the turn-on delay, steady-state time and wavelength chirp of SCH-QW lasers

Gity

Ansari

2009

2009 7th International Conference on Information, Communications and Signal Processing (ICICS)

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“…These parameters can be extracted from either AM response [27][28][29][30][31] or relative intensity noise ͑RIN͒ measurements. These parameters can be extracted from either AM response [27][28][29][30][31] or relative intensity noise ͑RIN͒ measurements.…”

Section: A Measurementsmentioning

confidence: 99%

Scaling effects on vertical-cavity surface-emitting lasers static and dynamic behavior

Jungo¹,

Sopra²,

Erni³

et al. 2002

Journal of Applied Physics

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Articles you may be interested inDifferential surface photovoltage spectroscopy characterization of a 1.3 μm InGaAlAs/InP vertical-cavity surfaceemitting laser structureWe investigate the influence of oxide aperture size and number of top distributed Bragg reflector pairs on the performance of oxide confined vertical-cavity surface emitting lasers. Several counteracting mechanisms are shown to result in nonmonotonic behavior, which limits the performance of very small cavities. Static, dynamic, and noise behavior are considered. We examine static operation by means of steady-state measurements, whereas dynamic behavior and noise performance are described by the intrinsic relaxation oscillation frequency, damping coefficient, and Schawlow-Townes linewidth. These parameters are extracted from relative intensity noise measurements. Reducing the oxide aperture up to a given optimal diameter is shown to improve the device's characteristics. We attribute the performance degradation below this value to increased diffraction losses, reduced confinement factor, and enhanced spontaneous emission. Similarly, increasing the number of Bragg reflector pairs first yields better overall performance as a consequence of reduced mirror losses. However, beyond an optimal value, significant reduction of the differential gain is observed that is attributed to gain compression and possibly thermal effects, degrading both the steady-state and high-frequency performance of the device.

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“…Here, we propose a novel approach that allows low cost CO-OFDM using direct modulation, with standard off-the-shelf DFB lasers, without any external modulators or optical filters. While the key limiting factor of direct modulation OFDM based system is the laser frequency chirp 5 , here, a digital signal processing (DSP) engine is used in order to compensate for both laser frequency response and laser frequency chirp in an optical OFDM system based upon laser rate equations and fiber parameters [6][7][8][9][10][11][12] . This allows a low cost optical OFDM solution for access and metropolitan applications.…”

Section: Introductionmentioning

confidence: 99%

Low cost direct modulation and coherent detection optical OFDM for metro applications

Sheffi

Sadot

2011

SPIE Proceedings

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High speed transmission systems (> 10 Gb/s) for cost-sensitive applications such as metropolitan network have attracted extensive interest due to the explosive data traffic growth in such applications. Optical orthogonal frequency division multiplexing (OFDM) based on direct modulation and direct detection for single-mode fiber (SMF) and multi-mode fiber (MMF) without optical amplification and chromatic dispersion (CD) compensation was proposed. Recent research has also shown that optical OFDM can be used with electronic dispersion compensation using direct detection in SMF. However, laser frequency chirp has been identified as a key limiting factor of capacity-versus-reach performance.In this paper, we present a novel concept of low cost optical OFDM with direct modulation of distributed feedback (DFB) lasers and coherent detection at 51.4 Gb/s and 64 QAM. A comprehensive theoretical model of the proposed system is developed. The proposed optical OFDM system concept and performance is based upon using electronic precompensation of laser frequency response, and electronic post compensation of DFB laser frequency chirp and CD. A numerical simulation of the transmission performance of the aforementioned system is conducted using different fiber lengths (40 km, 60 km, 120 km) and chirp parameters, which shows its attractiveness for access and metro applications.

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Intensity modulation and chirp of 1.55-/spl mu/m multiple-quantum-well laser diodes: modeling and experimental verification

Cited by 24 publications

References 27 publications

Modeling the effects of DLTs and carrier transport on the turn-on delay, steady-state time and wavelength chirp of SCH-QW lasers

Modeling the effects of DLTs and carrier transport on the turn-on delay, steady-state time and wavelength chirp of SCH-QW lasers

Scaling effects on vertical-cavity surface-emitting lasers static and dynamic behavior

Low cost direct modulation and coherent detection optical OFDM for metro applications

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