US 12,085,832 B2
Optical deflection device
Yuichi Akage, Tokyo (JP); Takashi Sakamoto, Tokyo (JP); Soichi Oka, Tokyo (JP); Sohan Kawamura, Tokyo (JP); and Masahiro Ueno, Tokyo (JP)
Assigned to NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
Appl. No. 17/609,221
Filed by Nippon Telegraph and Telephone Corporation, Tokyo (JP)
PCT Filed May 29, 2019, PCT No. PCT/JP2019/021214
§ 371(c)(1), (2) Date Nov. 5, 2021,
PCT Pub. No. WO2020/240726, PCT Pub. Date Dec. 3, 2020.
Prior Publication US 2022/0214594 A1, Jul. 7, 2022
Int. Cl. G02F 1/29 (2006.01); G02F 1/03 (2006.01)
CPC G02F 1/29 (2013.01) [G02F 1/0322 (2013.01); G02F 1/0311 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An optical deflection device comprising:
an electro-optic crystal comprising KTa1-xNbxO3, the electro-optic crystal having a first surface and a second surface, the first surface and the second surface facing each other;
a first electrode on the first surface of the electro-optic crystal;
a second electrode on the second surface of the electro-optic crystal;
a power source configured to output a control voltage for forming an electric field inside the electro-optic crystal via the first electrode and the second electrode; and
a light source configured to emit a pulse laser to be incident on the electro-optic crystal along an optical axis, the optical axis substantially perpendicular to a direction of the electric field formed by the control voltage,
wherein a peak power density of the pulse laser output from the light source at a light incidence surface of the electro-optic crystal is less than 800000 W/cm2.