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Quadrant and Bi-Cell Silicon Photodiode Amplifier Module

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Quadrant and Bi-Cell Silicon Photodiode Amplifier Module

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Quadrant and bi-cell photodiodes act on the principle of having two or four separate photodiode elements (active areas) separated by a small gap on a common substrate with a shared cathode. The anode or active area of each element is individually available so that a light spot illuminating a single quadrant can be electrically characterized as being in that quadrant only. As this spot is translated across the detector, its energy is distributed between adjacent elements, and the difference in electrical contribution to each segment defines its relative position with respect to the center of the device.

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