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We proposed and demonstrated all-optical clock recovery system using a monolithic mode-locked laser diode (MLLD) that operated with less sensitivity to the polarization and the wavelength of the input data signals also with no bandpass filter to eliminate the input signal-components. The keys to this new technique are the MLLD integrated with a tensile-strained quantum-well saturable absorber and...
A coupling-control of quasi-end-firing DFB film dye laser on a chip was proposed. The absorption length can be changed by slightly modification of refractive index, and it makes pumping switch possible on the laser array.
We developed two new kinds of terahertz-wave parametric generators (TPG) by using compact pump sources. One TPG generates high energy and broadband THz-waves with high stability, the other has a potential to be a narrow-linewidth injection-seeded TPG.
Wavelength-conversion by four-wave mixing in a hybrid mode-locked DBR laser diode where a mode-locked pulse train was used as a pump light was proposed and demonstrated. Wavelength-conversion of 18.23 Gbit/s RZ signals was successfully achieved.
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