engineering recuitment GATE IN Test Series 2023-24 Mock Test Communication Systems Optical Sources and Detector Photodiode
A Silicon RAPD operating at a wavelength of 0.80 μm exhibits a Quantum efficiency of 90% a multiplication factor of 800 and a dark current of 2nA. The rate at which the photons should be incident on device So that the output current after avalanche gain is greater than the dark current is ___________ × 1011 photons/sec.
Enter numerical value using the virtual keypad. Round off where necessary.