Patent ID: 7373086
Filing Date: 2008-05-13
Classification: G02F

Abstract:
1. A standard radio frequency signal generating method comprising: a modulation sideband generating step comprising a step of generating a modulation sideband made from a plurality of line spectra by modulating CW light with a frequency tunable modulator, and a line spectra increase step of increasing the number of line spectra of the modulation sideband by passing the modulation sideband through a nonlinear optical material; a line spectra selection step of selecting, with a wavelength filtering device, two of the line spectra of different wavelengths from among the line spectra of which the number has been increased by the line spectra increase step; and a detection step of generating a difference frequency signal by heterodyne detecting a beat signal of the two line spectra which have been selected by the line spectra selection step.