Browsing by Author "Sun, Yi-Jan Leo"

Now showing 1 - 1 of 1

Digitally Chirped Multilayer Quantum Dot Lasers with Dual-Wavelength Lasing Emissions
(2019-06-01)
Sun, Yi-Jan Leo
;
Hsieh, Pin-Hsien
;
Lin, Gray
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
The dual-wavelength lasing emissions of digitally chirped multilayer quantum dot (QD) lasers are investigated both experimentally and theoretically. The two lasing wavelengths are both identified as ground-state (GS) emissions but originated from different stacks of QD multilayers. The lasing spectra exhibited broadening and splitting properties by injecting more current. Moreover, the wavelength-resolved light-current characteristics reveal that first GS lasing intensity upon the threshold of second GS transitions neither saturates nor droops with increasing injection current, but increases with slightly reduced slope efficiency. A theoretical model is developed for digitally chirped multilayer QD lasers. The simulation results qualitatively reproduce the experimental observations.