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Rate-equation model is employed to investigate the anomalous threshold lasing spectra of chirped quantum dot lasers. Simultaneous two-wavelength lasing is attributed to two ground-state emissions from chirped multilayers of InAs/InGaAs quantum dots.
We present two-dimension gallium nitride (GaN) quantum-well (QW) diode laser (LD) simulation using Rsoft LaserMOD. The optical mode patterns are calculated and analyzed by the transfer matrix and Ritz Iteration. Our study is focus on the ghost mode reduction in the GaN laser design and laser performance.
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