Fringe Detection Unit

LD 474407
Fringe Detection Unit
Fringe Detection Unit

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Description

Both the opposite running modes of the ring resonator cw and ccw (clockwise and counter clockwise) are superimposed with the help of a beam splitter and the deflection mirror for generating the interference of both modes. This arrangement creates two seperate beams with their individual interference patterns, out of phase by 180°, which are detected by the Si PIN photodetectors. The detectors are connected to the preamplifier (474 308), which produces a TTL signal from both the signals by means of a comparator circuit, which are subsequently counted by the connected frequency counter (474 311).

Related Documents

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Videos


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