To provide a high-frequency modulated signal generating device which can be constituted easily at low cost and can generate a modulated signal of a high frequency having a stable center frequency.
Output light from a light source 102 is branched by an optical branching part 103 into a 1st light wave and a 2nd light wave. The 1st light wave is inputted to an optical coupling part 105 through a 1st optical waveguide part 107. The 2nd light wave is inputted to an SBS generation part 104 through a 2nd optical waveguide part 108. At this SBS generation part 104, induced Brillouin scattering is caused to perform conversion to a 3rd light wave (Stokes light) whose frequency becomes lower than that of the 2nd light wave (Stokes shift frequency), and the light wave is inputted to the optical coupling part 105 through a 3rd optical waveguide part 109. The optical coupling part 105 couples the 1st light wave and 3rd light wave with each other and outputs resulting light to an optical detection part 106. The optical detection part 106 performs heterodyne detection to generate a beat component of the Stokes shift frequency (about 10 GHz).
SASAI HIROYUKI
FUSE MASARU
MORIKURA SUSUMU
UCHIUMI KUNIAKI
