Yanson, D A, Street, M W, McDougall, S D, Thayne, I G, Marsh, J H and Avrutin, E A (2002) Ultrafast harmonic mode-locking of monolithic compound-cavity laser diodes incorporating photonic-bandgap reflectors. IEEE Journal of Quantum Electronics. pp. 1-11. ISSN 0018-9197Full text available as:
We present the first demonstration of reproducible harmonic mode-locked operation from a novel design of monolithic semiconductor laser comprising a compound cavity formed by a 1-D photonic-bandgap (PBG) mirror. Mode-locking (ML) is achieved at a harmonic of the fundamental round-trip frequency with pulse repetition rates from 131 GHz up to a record high frequency of 2.1 THz. The devices are fabricated from GaAs-Al-GaAs material emitting at a wavelength of 860 nm and incorporate two gain sections with an etched PBG reflector between them, and a saturable absorber section. Autocorrelation studies are reported which allow the device behavior for different ML frequencies, compound cavity ratios, and type and number of intra-cavity reflectors to be analyzed. The highly reflective PBG microstructures are shown to be essential for subharmonic-free ML operation of the high-frequency devices. We have also demonstrated that the single PBG reflector can be replaced by two separate features with lower optical loss. These lasers may find applications in terahertz; imaging, medicine, ultrafast optical links, and atmospheric sensing.
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|Keywords:||microwave generation, mode-locked lasers, optical modulation, optoelectronic devices, quantum-well lasers, semiconductor lasers, submillimeter wave generation, submillimeter wave modulation, WAVE-GUIDE AUTOCORRELATOR, TEMPERATURE-GROWN GAAS, SEMICONDUCTOR-LASERS, FABRY-PEROT, TERAHERTZ, MICROSTRUCTURES, ABSORPTION|
|Academic Units:||The University of York > Electronics (York)|
|Depositing User:||Eugene A Avrutin|
|Date Deposited:||16 Sep 2005|
|Last Modified:||17 Oct 2013 14:33|