We exploit the coupled emission-states of a single-chip semiconductor InAs/GaAs quantum-dot laser emitting simultaneously on ground-state (λGS = 1245 nm) and excited-state (λES = 1175 nm) to demonstrate coupled-two-state self-mixing velocimetry for a moving diffuse reflector. A 13 Hz-narrow Doppler beat frequency signal at 317 Hz is obtained for a reflector velocity of 3 mm/s, which exemplifies a 66-fold improvement in width as compared to single-wavelength self-mixing velocimetry. Simulation results reveal the physical origin of this signal, the coupling of excited-state and ground-state photons via the carriers, which is unique for quantum-dot lasers and reproduce the experimental results with excellent agreement.
Two-state semiconductor laser self-mixing velocimetry exploiting coupled quantum-dot emission-states: experiment, simulation and theory / Mariangela Gioannini;Marius Dommermuth;Lukas Drzewietzki;Igor Krestnikov;Daniil Livshits;Michel Krakowski;Stefan Breuer. - In: OPTICS EXPRESS. - ISSN 1094-4087. - STAMPA. - 22:19(2014), pp. 23402-23414. [10.1364/OE.22.023402]
|Titolo:||Two-state semiconductor laser self-mixing velocimetry exploiting coupled quantum-dot emission-states: experiment, simulation and theory|
|Data di pubblicazione:||2014|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1364/OE.22.023402|
|Appare nelle tipologie:||1.1 Articolo in rivista|