Patent ID: 7756385
Filing Date: 2010-07-13
Classification: H04B,Y10S

Abstract:
1. An antisqueezed light generator constructed of an optical system, the system comprising: a laser light source; an intensity modulator that modulates output light from the laser light source into pulsed light (let ΔT denote a full width at half maximum with respect to a pulse time width in such event); an optical amplifier for amplifying the pulsed light (let P a first optical fiber that has an negative group-velocity dispersion at a operating wavelength λ of the laser light source; and a second optical fiber with a smaller negative group-velocity dispersion in absolute value than that of the first optical fiber, wherein each parameter of ΔT, P a length of first optical fiber is set within a range of 60 to 150% of the fiber length z a length of the second optical fiber is within a range from 1 km to 100 km, and the light whose noise is expanded in a phase direction is eventually outputted.