Abstract
The application of semiconductor lasers in optical communication requires high dynamic performance. The K factor, defined as the ratio of damping rate to the square of relaxation resonance frequency, is a measure of the laser maximum achievable modulation bandwidth, , where τp is the photon lifetime, ε is the nonlinear coefficient, vg is the group index, and g0 is the differential gain.1 There are, therefore, three ways to reduce K, hence improving fmax—increasing g0, decreasing τp, or decreasing ε.
© 1993 Optical Society of America
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