Nonlinearities of GaAlAs lasers - Harmonic distortion

Stubkjaer, K.E.; Danielsen, M.

doi:10.1109/jqe.1980.1070526

Cited by 38 publications

(5 citation statements)

References 14 publications

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“…Therefore, in the neighbourhood of the lasing threshold, the I-L curve given by (6) would differ from that of the conventional static I-L curve. Therefore, in this paper it will be hereafter called as the dynamic I-L curve for brief.…”

Section: Analysis Of Harmonic Distortion 21 Rate Equationmentioning

confidence: 95%

“…Accordingly, LD has become a light source with a very low distortion. Up to the present, several theoretical and experimental studies on the harmonic distortion of LD have been reported [1][2][3][4][5][6]. However, there is no detailed report on the relation between the harmonic distortion and LD parameters, especially, the parameters of spontaneous emission and carrier diffusion.…”

Section: Introductionmentioning

confidence: 99%

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Harmonic Characteristics of Laser Diodes

Hong¹,

Suematsu²,

Chung³

et al. 1982

Journal of Optical Communications

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The harmonic distortion caused by laser diodes is given analytically. It is shown that the spontaneous-emission factor, the diffusion factor, and the photon lifetime in the cavity play central roles for the evaluation of distortion. The harmonic distortion decreases when the diffusion length is nearly equal to the stripe width together with a smaller spontaneous-emission factor and the photon lifetime. The threshold current is uniquely defined by a minimum point of the third harmonic distortion at a low frequency limit. The harmonic component in the modulation current severely influences the quantitative analysis of the harmonic distortion of light output.

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Section: Analysis Of Harmonic Distortion 21 Rate Equationmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Harmonic Characteristics of Laser Diodes

Hong¹,

Suematsu²,

Chung³

et al. 1982

Journal of Optical Communications

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“…IMD occurs when the nonlinearity of a device with multiple input frequencies causes undesired output at other frequencies. The laser diode can be modeled accurately as a third order polynomial without memory as described in [1] and [2].…”

Section: A Laser Nonlinearitymentioning

confidence: 99%

Measurement of optical impairments in OFDM based radio-over-fiber communication systems

Khan

Raahemifar

2011

2011 21st International Conference on Noise and Fluctuations

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Radio-over-Fiber (RoF) technology allows radio frequency transmission directly over the fiber. Optical link employs laser, optical fiber and optical detector to transmit RF signal. RoF has an ability to carry signals for tens of kilometers, but this transmission is limited by optical impairments such as laser nonlinearity, fiber dispersion, and optical detector noises. In this paper, we study the effects of multimode fiber core refractive index profile, optical detector noises and atmospheric instability on the achievable performance of an OFDM based RoF link. The optical-signal-to-noise ratio (OSNR) and cumulative signalto-noise ratio (SNRc) are used to evaluate the feasibility of the proposed scheme for a low-cost, reliable, robust, and high data rate fiber-wireless link. Thereafter, numerical results are generated for the downlink to illustrate the performance of the OFDM based RoF system. Index Terms-OFDM, radio-over-fiber, optical signal-tonoise ratio, cumulative signal-to-noise ratio, optical fiber dispersion.

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“…Until now only a few results on measurements and prediction of nonlinear distortion by semiconductor lasers have been published [1][2][3][4][5]. In the case of optical transmission systems the main source of nonlinear distortions is the semiconductor laser.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear System Modeling of Semiconductor Lasers Based on Volterra Series

Czylwik¹

1986

Journal of Optical Communications

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Starting from the simple monomode rate equations of semiconductor lasers a very comprehensive nonlinear equivalent circuit diagram of analog modulated semiconductor lasers is presented. For distortion analysis this equivalent circuit diagram is investigated using Volterra series and for the first time the Volterra kernels of semiconductor lasers are derived. By means of the Volterra kernels harmonic, intermodulation and other nonlinear distortions can easily be obtained.Using Volterra series the complex amplitude of any nonlinear product is exactly calculated because all formulae are derived analytically. The results are for all cases equal to those obtained from simulation of the rate equations. Nonlinear distortions are calculated for two different input signals: harmonic modulation and stochastic modulation. The dependence of nonlinear distortion on laser parameters is investigated and the influence of reflections is estimated.

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Nonlinearities of GaAlAs lasers - Harmonic distortion

Cited by 38 publications

References 14 publications

Harmonic Characteristics of Laser Diodes

Harmonic Characteristics of Laser Diodes

Measurement of optical impairments in OFDM based radio-over-fiber communication systems

Nonlinear System Modeling of Semiconductor Lasers Based on Volterra Series

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