Passive harmonic mode locking by mode selection in Fabry–Perot diode lasers with patterned effective index

Abstract

We demonstrate passive harmonic mode locking of a quantum-well laser diode designed to support a discrete comb of Fabry–Perot modes. Spectral filtering of the mode spectrum was achieved using a nonperiodic patterning of the cavity effective index. By selecting six modes spaced at twice the fundamental mode spacing, near-transform- limited pulsed output with $2\mathrm{ps}$ pulse duration was obtained at a repetition rate of $100\mathrm{GHz}$.

© 2010 Optical Society of America

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