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Passively Mode-Locked Micromechanically-Tunable Semiconductor Lasers
Yoshitada KATAGIRI Atsushi TAKADA Shigendo NISHI Hiroshi ABE Yuji UENISHI Shinji NAGAOKA
IEICE TRANSACTIONS on Electronics
Publication Date: 1998/02/25
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Ultrashort Optical Pulse Technologies and their Applications)
mode-locked semiconductor laser, phase-locked loop, micromechanics, external-cavity laser, tunable optical pulse source,
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We propose a mechanically tunable passively mode-locked semiconductor laser with a high repetition rate using a simple configuration with a moving mirror located very close to a laser facet. This scheme is demonstrated for the first time by a novel micromechanical laser consisting of an InGaAsP/InP multisegment laser with a monolithic moving micro-mirror driven by an electrostatic comb structure. The main advantage of this laser is the capability of generating high-quality mode-locked pulses stabilized by a phase-locked loop (PLL) with low residual phase noise in a wide repetition-rate tuning range. This paper describes the basic concept and tuning performances utilizing the micromechanical passively mode-locked laser in 22-GHz fundamental mode-locking and in its second-harmonic mode-locking.