GENERATION OF SUB-POISSONIAN LIGHT IN AN OPEN-LOOP LED SYSTEM BY THE QUANTUM CORRELATION

This paper describes the generation and observation of sub-Poissonian light in an open-loop system with low quantum efficiency at room tempe rature. The experimental results show that the photocurrent fluctuatio n spectrum density can be reduced below the shot noise limit by 72% (- 5.5 dB) in an open-loop light-emitting diode (LED) system at the frequ ency of 2 MHz. The noise reduction is not limited by quantum efficienc y of the LED, or the current transfer efficiency.