Patent ID: 7972034

Claim:
A laser light source comprising: a laser array in which plural emitters are arranged, the plural emitters including a first emitter, a second emitter, and a third emitter, the second emitter being disposed between the first emitter and the third emitter; a submount having first and second surfaces facing in opposite directions, the laser array provided on the first surface; a base plate having a surface on which the submount is provided with the second surface of the submount facing the surface; and a joining member provided between the base plate and the submount, wherein: a distance between the first surface and the second surface of the submount is larger under the second emitter than under the first emitter; a distance between the first surface and the second surface of the submount is larger under the third emitter than under the second emitter; and a coefficient of thermal conductivity of the submount is smaller than a coefficient of thermal conductivity of the joining member.