Optical waveguides – With optical coupler – Input/output coupler
Patent
1997-09-02
2000-09-19
Palmer, Phan T. H.
Optical waveguides
With optical coupler
Input/output coupler
385 37, 385 46, 372 99, 372 77, G02B 626
Patent
active
061224197
ABSTRACT:
The present invention relates to an optical signal processing apparatus and optical signal processing method which enable generation, waveform shaping, waveform measurement, waveform recording, correlation processing, and the like of optical pulses of 1-10 ps. A basic construction of the optical signal processing apparatus includes an optical waveguide, a first structure for equally distributing output light of the optical waveguide, an optical waveguide comprising an aggregate of optical waveguides changing in optical length by a constant interval, a arrayed waveguide for dividing the output light, second structure for focusing optical output of the arrayed waveguide, and a mirror for receiving and reflecting incident light focused by the second structure. Or, the apparatus includes an optical waveguide, first structure for equally distributing output light of the optical waveguide, a arrayed waveguide comprising an aggregate of optical waveguides changing in optical length by a constant interval for dividing the output light, second structure for focusing optical output of the arrayed waveguide, and a spatial filter for receiving light focused by the second structure to distribute the incident light on a straight line and making desired amplitude or phase modulation of the light according to the position on the straight line and reflecting the light.
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Ishii Tetsuyoshi
Kurokawa Takashi
Naganuma Kazunori
Okamoto Katsunari
Takenouchi Hirokazu
Nippon Telegraph & Telephone Corporation
Palmer Phan T. H.
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