Patent ID: 7356065

Claim:
A laser-diode-excited solid-state laser apparatus comprising: a GaN-based compound laser diode which emits an excitation laser beam; and a solid-state laser crystal which is doped with Dy 3+ , and emits a solid-state laser beam generated by one of a first transition from 4 F 9/2 to 6 H 13/2 and a second transition from 4 F 9/2 to 6 H 11/2 when the solid-state laser crystal is excited with said excitation laser beam, wherein the solid-state laser crystal produces both the first transition and the second transition when the solid-state laser crystal is excited with said excitation laser beam, and the solid-state laser crystal includes a first coating disposed on a backward end surface of the solid-state laser crystal and a second coating disposed on a forward end surface of the solid-state laser crystal, which enable the solid-state crystal to emit the solid-state laser beam generated by one of the first transition and the second transition.