Ci. Um et al., PROPERTIES OF QUANTUM-NONDEMOLITION MEASUREMENTS OF THE PHOTON NUMBEROF 2 LIGHT MODES VIA THE OPTICAL KERR-EFFECT, Journal of the Korean Physical Society, 32(4), 1998, pp. 474-480
This paper analyzes the quantum measurement properties of the photon n
umber of two signal modes in the balanced homodyning detector of a non
linear Mach-Zehnder interferometer. In this scheme, the sum of the pho
ton number is measured via Kerr-type photon number quantum nondemoliti
on measurements, where both the cross and the self-phase modulation ef
fects of the Kerr media are considered.