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An Optically controlled beam forming network has been developed, which has capacity of steering 2 beams and exciting 64 antenna elements. Using it, beam steering and beam width control is possible in parallel.
We propose an optically controlled multiple-beam phased array antenna employing spatial and wavelength multiplexing. We have developed the prototype of the optical beam-former, which enables control of 10 beams individually, and demonstrated at 18 GHz.
This paper reviews the recent progress of self-assembled quantum-dot optical devices, highlighting temperature-insensitive 10 Gb/s directly modulated lasers at 1.3 mum and 40 Gb/s signal-regenerative amplifiers in the 1.5 mu band
A semiconductor optical amplifier having a gain of >20 dB, noise figure of >7 dB, and 3-dB saturation output power of >19 dBm, over the record widest bandwidth of 120 nm among all kinds of optical amplifiers, and also having a penalty-free output power of 23 dBm, the record highest among all the semiconductor optical amplifiers, was realized by using quantum dots.
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