Abstract

Recently, it has been recognized that carrier capture and escape processes in quantum wells (QVVs) play important roles in limiting the modulation bandwidth of quantum well lasers.^1-3 It was shown that the capture time constant (τ_cap) and the ratio of the capture to escape time constant (R ≡ τ_cap/τ_csc)are two significant parameters that directly affect the modulation response.^1-3 In particular, a large ratio R increases both the damping and inertia of the relaxation oscillation and is thus detrimental to high speed modulation.

© 1992 Optical Society of America