Saturated gain spectrum of VECSELs determined by transient measurement of lasing onset.
Opt Express
; 22(6): 6919-24, 2014 Mar 24.
Article
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| MEDLINE
| ID: mdl-24664040
ABSTRACT
We describe time-resolved measurements of the evolution of the spectrum of radiation emitted by an optically-pumped continuous-wave InGaAs-GaAs quantum well laser, recorded as lasing builds up from noise to steady state. We extract a fitting parameter corresponding to the gain dispersion of the parabolic spectrum equal to -79 ± 30 fs2 and -36 ± 6 fs2 for a resonant and anti-resonant structure, respectively. Furthermore the recorded evolution of the spectrum allows for the calculation of an effective FWHM gain bandwidth for each structure, of 11 nm and 18 nm, respectively.
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MEDLINE
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Opt Express
Asunto de la revista:
OFTALMOLOGIA
Año:
2014
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Article