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Ultra-compact wavelength tunable laser diode with wide tunability was successfully developed with combining quantum dot optical amplifier and silicon micro-ring filters. The single mode laser oscillation was demonstrated with 25 nm wavelength tuning range.
A millimeter-wave (MMW) radar system is promising for high-precision imaging because of its short wavelength and broad range of available bandwidths [1]. Particularly in the frequency range of 92–100 GHz, where the US, the EU, and Japan allow radiolocation, an atmospheric attenuation coefficient of 0.4 dB/km in standard atmospheric conditions limits the imaging range. Thus, a distributed radar system...
A wideband transmittance/reflectivity measurement system for fine-structured components is proposed. The optical single-sideband frequency sweeper with an ultra wideband Hilbert transformer enables excellent frequency sweep range between 2GHz-30GHz. Frequency resolution of 4.7MHz is experimentally obtained.
We demonstrated stable 470 GHz clock signal generation, by using a reciprocating optical modulator with uniform fibre Bragg gratings having narrow passbands adjacent to reflection bands, which enables effective generation of high-order sideband components.
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