Patent ID: 7212559
Filing Date: 2007-05-01
Classification: H01S

Abstract:
1. A laser oscillator comprising: a solid-state laser medium for producing an emission spectrum having a width; a substrate which is bonded to the solid-state laser medium and which has a concave portion and a flat portion surrounding the concave portion on the side facing the solid-state laser medium; a first reflective mirror provided on or adjacent to a main surface of the solid-state laser medium on the side opposite to the substrate; and a second reflective mirror provided at least on the surface of the concave portion of the substrate, wherein the first and the second reflective mirrors serve as a laser resonator, and wherein single-longitudinal-mode oscillation is achieved when the longitudinal mode interval is more than about one-fifth and less than several times the width of the emission spectrum obtained by the solid-state laser medium.