Nippon Telegraph and Telephone Corporation

Hamamatsu-Photonics K.k.

Ntt Advanced Technology Corporation

Yukihiko Ushiyama

Takashi Sakamoto

Koei Yamamoto

Kazuo Fujiura

Seiji Toyoda

Masatoshi Fujimoto

Shogo Yagi

Tadashi Sakamoto

Joji Yamaguchi

Yuzo Sasaki

Koji Yoneyama

Eiichi Sugai

Mahiro Yamada

Provided is a swept light source including one end surface coupled to a wavelength filter constituted of a diffraction grating and an end mirror via a light deflector and another end surface including a gain medium facing an output coupling mirror and which configures a laser cavity between the end mirror and the output coupling mirror, wherein a drive voltage having an AC voltage on which a DC bias voltage is superimposed is output from a control voltage source of the light deflector to an electrode pair of an electro-optic crystal, light is radiated from a light emitter to the electro-optic crystal, and incident light from the gain medium incident along an optical axis perpendicular to a direction of an electric field formed by the control voltage is deflected in a direction parallel to the electric field, so that wavelength sweeping is performed.

Swept light source and method for controlling the same

Growing community of inventors

Kawasaki, Japan

Yukihiko Ushiyama