High speed quantum-well lasers and carrier transport effects

Nagarajan, Radhakrishnan; Ishikawa, Masayuki; Fukushima, Toru; Geels, R.S.; Bowers, John E.

doi:10.1109/3.159508

Cited by 429 publications

(196 citation statements)

References 65 publications

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“…The resulting modulation response is given by [9] and [21] in (17), shown at the bottom of the page, which can be written in the form (electrical) (18) is a constant which contributes to low-frequency roll-off. The interpretation of this effect is not straightforward.…”

Section: Rate Equations For Opticalmentioning

confidence: 99%

“…The above model is often referred to as the reservoir model [9] and is equivalent to models which incorporate additional effects such as diffusive transport [14]. A spontaneous emission term has been ignored in (3) for above threshold operation.…”

Section: Rate Equations For Opticalmentioning

confidence: 99%

“…Our objective is to calculate the small-signal frequency response of the test laser for optical modulation from the pump laser and use the same rate equations with a different source term to derive the electrical modulation response of the test laser. In general, transport effects for electrical microwave modulation can be modeled by taking into account the carrier density in the SCH region, the carrier density in the well region, and the photon density separately [9]. Coupling of the carrier density in the barrier states above the QW's to the carrier density in the QW's is modeled by two terms representing carrier capture and escape into or from the wells, respectively.…”

Section: Rate Equations For Opticalmentioning

confidence: 99%

“…Parasitic effects come from the bias circuit and the shunting of modulation current around the active layer, which will cause a low-frequency roll-off of modulation response. The carrier diffusion, capture, and escape times are usually defined to characterize the carrier transport processes [9], which give a parasitic-like roll-off and are indistinguishable from parasitic effects. In QW lasers, the carrier transport effect is an important limit for multiple quantum-well (MQW) laser modulation bandwidth.…”

Section: Introductionmentioning

confidence: 99%

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Temperature dependence of electrical and optical modulation responses of quantum-well lasers

Keating

Jin

Chuang

et al. 1999

IEEE J. Quantum Electron.

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Abstract-We present theory and experiment for high-speed optical injection in the absorption region of a quantum-well laser and compare the results with those of the electrical injection in cluding carrier transport effect. We show that the main difference between the two responses is the low-frequency roll-off. By using both injection methods, we obtain more accurate and consistent measurements of many important dynamic laser parameters, which include the differential gain, carrier lifetime, � factor, and gain compression factor. Temperature-dependent data of the test laser are presented which show that the most dominant effect is the linear degradation of differential gain and injection efficiency with increasing temperature. While the �-factor is insensitive to temperature variation for multiple-quantum-well lasers, we find that the carrier capture time and nonlinear gain suppression coefficient decreases as temperature increases.

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Section: Rate Equations For Opticalmentioning

confidence: 99%

Section: Rate Equations For Opticalmentioning

confidence: 99%

Section: Rate Equations For Opticalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Temperature dependence of electrical and optical modulation responses of quantum-well lasers

Keating

Jin

Chuang

et al. 1999

IEEE J. Quantum Electron.

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show abstract

“…Above 175 K however, the determination of bandwidth is possible but the maximum achievable value is greatly reduced compared to 300K. The low frequency roll-off [8] is a responsible parameter. This parasitic phenomenum is supposed to be linked to the dramatic increase of the laser series resistance.…”

Section: Modulation Bandwidthmentioning

confidence: 99%