In-situ proton radiation testing of 2.4 micron wavelength extended InGaAs photodiodes at dry ice and room temperatures

Abhay M. Joshi; Shubhaschish Datta; Jeffrey Mertz; Nilesh Soni; Michael Sivertz; Adam Rusek; C. Pearson; James Jardine

doi:10.1117/12.2587103

12 April 2021 In-situ proton radiation testing of 2.4 micron wavelength extended InGaAs photodiodes at dry ice and room temperatures

Abhay M. Joshi, Shubhaschish Datta, Jeffrey Mertz, Nilesh Soni, Michael Sivertz, Adam Rusek, C. Pearson, James Jardine

Author Affiliations +

Proceedings Volume 11744, Laser Radar Technology and Applications XXVI; 117440C (2021) https://doi.org/10.1117/12.2587103
Event: SPIE Defense + Commercial Sensing, 2021, Online Only

Abstract

We have successfully tested 290 μm diameter, 2.4 micron wavelength, Extended InGaAs photodiodes coupled with single mode fiber using 50 MeV Protons at both dry ice temperature (-75 °C) and room temperature (20 °C). The devices were reverse biased at 100 mV during the radiation run and their leakage current was continuously monitored insitu during the exposure. These devices find multiple applications in space for spectroscopy and sensing, inter-satellite optical communication links, rapid Doppler shift LIDAR, as well as inter-planetary and Earth-to-Moon communication links. Several photodiodes were tested using 50 MeV Protons with an average flux level of 2.11 × 10⁷ protons/cm² /s, for a total fluence of 1.0 × 10¹¹ protons/cm² and total dose of 20 krad (water). Pre- and post-radiation results were also measured for leakage current vs. voltage, responsivity (quantum efficiency), and bandwidth of the Extended InGaAs photodiodes. All devices were found to be fully functional at normal operating conditions and at both dry ice and room temperature.

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Abhay M. Joshi, Shubhaschish Datta, Jeffrey Mertz, Nilesh Soni, Michael Sivertz, Adam Rusek, C. Pearson, and James Jardine "In-situ proton radiation testing of 2.4 micron wavelength extended InGaAs photodiodes at dry ice and room temperatures", Proc. SPIE 11744, Laser Radar Technology and Applications XXVI, 117440C (12 April 2021); https://doi.org/10.1117/12.2587103

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