Experimental results on the squeezing of photon-number fluctuations of series-coupled LED’s driven by a constant-voltage source are presented that illustrate the advantage of series-coupled LED’s, namely, a greater squeezing capability than that of a single LED driven through an equivalent series resistor. We discuss the microscopic origin of the deep squeezing on the basis of quantum-mechanical Langevin equations.
© 1999 Optical Society of America
H. Sumitomo, Y. Kadoya, and M. Yamanishi, "Wideband deep penetration of photon-number fluctuations into the quantum regime in series-coupled light-emitting diodes," Opt. Lett. 24, 40-42 (1999)