ABSTRACT
Results on two types of experiments related to sub-Poissonian photon state are demonstrated; (a) the current-dependence of the squeezing bandwidth of a lightemitting-diode (LED) driven by a constant-current source at room temperature and (b) the generation of sub-Poissonian photons from a LED without recourse to high-impedance circuits at room temperature. In the interpretation of both squeezing characteristics, the significance of backward-pump process is emphasized.
