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 a GaAs substrate using a sandwiched sub-nano separator (SSNS) growth technique. A wide wavelength tuning range between 1.274 and 1.302 μm was achieved at a low gain current of 50 mA. In addition, a high extinction ratio of -20 dB at a low attenuator voltage (-2.5 V) was achieved in the fabricated QD-CML.
|ジャーナル||Physica Status Solidi (C) Current Topics in Solid State Physics|
|出版ステータス||Published - 2012 2月|
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