Patent ID: 8390920
Filing Date: 2013-03-05
Classification: G02B,G02F,H01S

Abstract:
1. A laser device, comprising: a fundamental wave generating portion configured to generate a plurality of fundamental waves having wavelengths which are different from each other in at least one set thereof, said fundamental wave generating portion having a semiconductor laser having a plurality of luminous points, and a Bragg reflection structure; and a nonlinear optical element in which a poling structure adapted to pseudophase matching for the wavelengths of the plurality of fundamental waves emitted from said fundamental wave generating portion, respectively, is formed variatively along a propagating direction of the plurality of fundamental waves, the nonlinear optical element being formed such that inversion and non-inversion of the polarization direction is repeated with a predetermined period and a pseudophase matching condition changes in a propagating direction of the fundamental waves.