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An ultracompact buried heterostructure photonic crystal nanocavity laser exhibits a small energy cost of 8.76 fJ/bit with 20-Gbit/s modulation by optical pumping. The maximum output power in waveguide and the external differential quantum efficiency are -10.3 dBm and 53%, respectively.
We demonstrate an all-optical wavelength-routing switch monolithically integrated with four wavelength converters and an 8times8 arrayed-waveguide-grating (AWG) filter. In the switch, double-ring-resonator-coupled tunable laser diodes allow rapid and stable switching between output ports (~5 ns) and optical gates based on a parallel amplifier structure prevent the input optical signal from being routed...
We describe widely tunable lasers incorporating microring resonators. By using a double-ring-resonator-coupled filter, a wide wavelength tuning range is achieved with a low tuning current. A double-ring-resonator-coupled tunable laser has series-connected microring resonators in the laser cavity. A tuning range of 50 nm is achieved with injection current of less than 5.2 mA. This low injection current...
A novel integrated filtered feedback tunable laser consisting of a Fabry-Perot laser and integrated filtered feedback section is proposed and demonstrated. The device exhibited a 24-nm tuning range and 1-GHz thermal frequency drift.
A filter-free widely tunable wavelength converter was developed by monolithically integrating a tunable laser based on a double-ring resonator and an optical gate based on a parallel amplifier structure. Wavelength conversion for a 10-Gbit/s NRZ signal is also demonstrated, tunable over a 40-nm range.
A monolithically integrated digitally tunable ring laser has been developed that employs a ladder filter and a ring resonator. The ladder filter selects one channel from the periodic channels of the ring resonator and the stable device performance is achieved by adopting a chirped ladder filter with one dominant passband. The device is capable of 34-channel (100-GHz spacing) digitally tunable laser...
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