High-density avalanche photodiode array

Ernesto V. Gramsch; Shane X. Zhang; Michael C. Madden; Myron Lindberg; Marek Szawlowski

doi:10.1117/12.158566

15 October 1993 High-density avalanche photodiode array

Ernesto V. Gramsch, Shane X. Zhang, Michael C. Madden, Myron Lindberg, Marek Szawlowski

Proceedings Volume 2022, Photodetectors and Power Meters; (1993) https://doi.org/10.1117/12.158566
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

Using bevelled edge avalanche photodiode technology, we have built several two dimensional 64-element arrays. Each pixel measures 1.24 X 1.24 mm², with no dead space in between . The array was built by thinning and segmenting the back side of a large area APD to form the pixels. Very good isolation is obtained, and the response from each pixel on the back side corresponds to the location and intensity of the input signal on the front side. Signal gain in each pixel is the same as the starting APD, approaching approximately 1000, with good uniformity. The crosstalk between pixels is proportional to the resistance between them, and is dependent on the bias applied to the detector, at high bias, the crosstalk is less than 1%. Because of the small pixel size, the response time to laser excitation approaches approximately 6 ns. These arrays have very good potential for imaging systems and optical fiber readout in high energy physics detectors.

Citation Download Citation

Ernesto V. Gramsch, Shane X. Zhang, Michael C. Madden, Myron Lindberg, and Marek Szawlowski "High-density avalanche photodiode array", Proc. SPIE 2022, Photodetectors and Power Meters, (15 October 1993); https://doi.org/10.1117/12.158566

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