Differential gain and damping factor in strained InGaAs/GaAs quantum well lasers

Luke F. Lester; William J. Schaff; Sean S. O'Keefe; Xiao J. Song; B. A. Foreman; Lester Fuess Eastman

doi:10.1117/12.59130

26 June 1992 Differential gain and damping factor in strained inGaAs/GaAs quantum well lasers

Luke F. Lester, William J. Schaff, Sean S. O'Keefe, Xiao J. Song, B. A. Foreman, Lester Fuess Eastman

Proceedings Volume 1634, Laser Diode Technology and Applications IV; (1992) https://doi.org/10.1117/12.59130
Event: OE/LASE '92, 1992, Los Angeles, CA, United States

Abstract

The differential gain, modulation response, and damping rate of strained-layer Ino•3Ga(J•7As multiple quantum well (MQW) short cavity graded-index separate confmement heterostrucutre (GRINSCH) and SCH lasers fabricated by chemically-assisted ion beam etching (CAIBE) are analyzed. Calculated differential gains vary from 0.7 to. 1 .6 x 1015 cm2, with only relatively long lasers of 400 p.m demonstrating very high differential gain. For the GRINSCH lasers, a CW 3-dB bandwidth of 22 GHz has been measured that is limited primarily by heating and a low frequency rolloff. The latter is improved dramatically using an SCH design resulting in an improvement of the 3-dB bandwidth to 28 GHz. Cather transport theory (also known as well-barrier hole burning) is shown to model the damping behavior of quantum well lasers from low to moderate photon densities.

Citation Download Citation

Luke F. Lester, William J. Schaff, Sean S. O'Keefe, Xiao J. Song, B. A. Foreman, and Lester Fuess Eastman "Differential gain and damping factor in strained inGaAs/GaAs quantum well lasers", Proc. SPIE 1634, Laser Diode Technology and Applications IV, (26 June 1992); https://doi.org/10.1117/12.59130

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