HIGH-FREQUENCY CHARACTERISTICS OF DIRECTLY MODULATED InGaAsP RIDGE WAVEGUIDE AND BURIED HETEROSTRUCTURE LASERS.

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作者
Tucker, Rodney S. [1 ]
Kaminow, Ivan P. [1 ]
机构
[1] AT&T, Bell Lab, Crawford Hill, Lab, Holmdel, NJ, USA, AT&T, Bell Lab, Crawford Hill Lab, Holmdel, NJ, USA
关键词
SEMICONDUCTING GALLIUM ARSENIDE - Applications - SEMICONDUCTING INDIUM COMPOUNDS - Applications - WAVEGUIDES; OPTICAL;
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摘要
The high-frequency modulation characteristics of InGaAsP ridge waveguide lasers at 1. 55 micrometer and etched mesa buried heterostructure (EMBH) lasers at 1. 3 micrometer are investigated. Small-signal and large-signal circuit models are developed for both devices, and the main factors which influence the high-frequency modulation response are established. It is shown that the electrical parasitics in the chip dominate the small-signal frequency response of the EMBH laser and limit the large-signal turn-on and turn-off times. The small-signal and large-signal responses of both devices show strong damping of the relaxation oscillations. This damping can be modeled accurately using field-dependent optical gain compression in the rate equation.
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