Translator Disclaimer
9 June 2014 Current pulse investigation toward optimal pumping of a gain-switched asymmetric waveguide laser diode
Author Affiliations +
Abstract
Optical transient responses to a variety of pump-current pulses, modified in length and amplitude, are experimentally investigated under room temperature conditions for a Fabry-Perot semiconductor bulk laser with an 80 nm thick active layer (AL) comprised in a strongly asymmetric broadened waveguide structure. At best, gain-switched trailing oscillations free single optical pulses with ~2.48 nJ pulse energy, Eopt, and ~130 ps full width at half maximum (FWHM), equivalent to ~13 W peak power were achieved. The corresponding pump-current pulse was of ~6.9 A amplitude and ~1.26 ns FWHM generated with a compact driver circuit of ~1 cm2 in size utilizing a commercial silicon avalanche transistor as an electrical switch. We found that the laser pulse temporal position correlates with a critical charge, Qcrit, arising from the current pulse, which scales with the laser diode oxide stripe width (90 μm) and cavity length (1.5 mm).
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Brigitte Lanz and Juha T. Kostamovaara "Current pulse investigation toward optimal pumping of a gain-switched asymmetric waveguide laser diode", Proc. SPIE 9081, Laser Technology for Defense and Security X, 90810W (9 June 2014); https://doi.org/10.1117/12.2050238
PROCEEDINGS
10 PAGES


SHARE
Advertisement
Advertisement
RELATED CONTENT


Back to Top