Title :
An optical integrated circuit for time-division 2-D velocity measurement
Author :
Toda, Hiroyuki ; Kasazumi, Kenichi ; Haruna, Masamitsu ; Nishihara, Hiroshi
Author_Institution :
Dept. of Electron., Osaka Univ., Japan
Abstract :
An LiNbO/sub 3/ 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 v/sub X/ and v/sub gamma / of a moving object, a waveguide switch is integrated on a Z-propagating LiNbO/sub 3/ substrate of 28*7 mm/sup 2/ in addition to a waveguide interferometer with a frequency shifter. In the optical IC, either v/sub X/ or v/sub gamma / 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.<>
Keywords :
integrated optics; lithium compounds; velocity measurement; LiNbO/sub 3/; Z propagating substrate; electronic gate; moving object; optical integrated circuit; photodiode; signal-to-noise ratio; time-division multiplexed beat signals; time-division two-dimensional velocity measurement; velocity components; waveguide switch; Gamma ray detection; Gamma ray detectors; Integrated optics; Object detection; Optical interferometry; Optical switches; Optical waveguide components; Optical waveguides; Photonic integrated circuits; Velocity measurement;
Journal_Title :
Lightwave Technology, Journal of
