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A broadband light source for a wavelength range of around 1.2‐1.3 μm can be fabricated using a multi‐stacked and modulated InAs/InGaAs quantum dot (QD) structure with the sandwich sub‐nano separator (SSNS) technique. These techniques, such as use of the modulated QD structure and SSNS structure, are considered useful in obtaining a high‐quality and ultra‐broadband QD optical gain material for the...
The generation of multiple‐wavelength fine peaks in the 1.3‐μm waveband with wavelength tunability and powercontrollability is successfully demonstrated using a quantum‐dot optical frequency comb laser (QD‐CML) integrated with an absorptive optical attenuator by employing a broadband optical injection seeding technique. High‐quality, high‐density InAs/InGaAs QD optical gain media are fabricated on...
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