Broadband operation of coupled-stripe multiple quantum well AlGaAs laser diodes

Abstract

A recently developed AlGaAs multiple stripe, multiple quantum well superluminescence light-emitting diode (SLED) with an extremely low reflectivity front-facet coating is operated as a high-power laser in an external grating cavity over an unusually broad tuning range. The SLED diode is operated continuously (cw) in a tuning range Δℏω∼94 meV and a power output from the grating cavity of 75 mW (optical flux ∼500 mW within the compound cavity). Data are presented showing the output power as a function of wavelength at currents of 750 mA (7660 Å<λ<8040 Å) and 1.0 A (7620 Å<λ<8085 Å). The threshold current in pulsed laser operation is measured over a range of 130 meV.