Annual Meeting Optical Society of America

Light emitting diode sub-Poissonian light source

P. R. Tapster, John G. Rarity, J.S. Satchell

Published Jan 1, 1987• 0 citations

Abstract

We drive a high-efficiency gallium arsenide light emitting diode (LED) with a low-noise current and measure the noise in the detected photocurrent from a high-quantum-efficiency silicon photodiode collecting most of the emitted light. The drive current is obtained from a resistor in series with a low-noise voltage supply. The Johnson noise in the current is much less than shot noise whenever the voltage across the resistor is large compared with 50 mV (2kT/e at room temperature). The LED converts electrons to photons directly with some efficiency η.

DOI: 10.1364/oam.1987.thpo22

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