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O-band InAs/InGaAs quantum-dot (QD) laser-diode has been successfully demonstrated by using sandwiched sub-nano separator (SSNS) structures on GaAs. Improvement of crystal-qualities and enhancement of luminescence intensities were attained for the QD laser by SSNS technique.
1-mum waveband, 12.5-Gbps transmission over a 1.5-km single-mode holey-fiber is demonstrated with clear eye-openings. A wavelength tunable single-mode selected quantum-dot optical frequency-comb laser is used as the optical-source potentially capable of wavelength division multiplexing (WDM).
We fabricated broad-area laser diodes containing highly stacked InAs quantum dots (QDs) using the strain-compensation technique; these diodes showed laser emission at 1529 nm in pulsed mode with a threshold current of 517.5 mA.
1-mum waveband, 10 Gbps transmission over 1.5-km single-mode holey fiber is demonstrated with clear eye-openings. A wavelength tunable single-mode selected quantum-dot optical frequency comb laser is utilized as the optical source potentially capable of WDM source.
For developing a 1-mum waveband photonic-transport system, we fabricated a harmonically mode-locked semiconductor laser (MLL) RZ-signal source. We successfully demonstrated a 10-Gbit/s error-free transmission over a 7-km single-mode hole assisted fiber (HAF) at 1035- nm.
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