An optical integrated circuit for time-division 2-D velocitymeasurement |
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Authors: | Toda H Kasazumi K Haruna M Nishihara H |
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Affiliation: | Dept. of Electron., Osaka Univ.; |
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Abstract: | An LiNbO3 optical integrated circuit pigtailed with two single-mode fibres, which allows time-division two-dimensional velocity measurement, is discussed. To detect time-division multiplexed beat signals corresponding to velocity components vX and vγ of a moving object, a waveguide switch is integrated on a Z-propagating LiNbO3 substrate of 28×7 mm2 in addition to a waveguide interferometer with a frequency shifter. In the optical IC, either vX or vγ could be measured selectively with signal-to-noise ratio of 20 dB by driving an electronic gate placed after a photodiode in synchronization with the waveguide switch |
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