Wide-band suppression of photon-number fluctuations in a high-speed light-emitting diode driven by a constant-current source

We demonstrate experimental results on the generation of sub-Poissonian photon fluxes emanating from an AlGaAs light-emitting diode, which manifest a wide-band (0-100 MHz) noise suppression below the standard quantum limit level despite low current density (similar to 38 A/cm(2)) operation at room temperature. The experimental noise power spectrum is well fitted in terms of the theoretical curve estimated with the quantum mechanical Langevin equations. (C) 1998 American Institute of Physics.