Patent ID: 7561612
Filing Date: 2009-07-14
Classification: H01S,H04N

Abstract:
1. A laser source device, comprising: a light source that emits a light beam with a first wavelength; an external resonator that selectively reflects the light beam with the first wavelength towards the light source; a wavelength conversion element that converts a wavelength of a part of the light beam with the first wavelength into a second wavelength different from the first wavelength, the wavelength conversion element being disposed on a first optical path formed between the light source and the external resonator; and an optical path conversion element that guides the part of the light beam converted into the second wavelength to a second optical path different from the first optical path; the light beam with the second wavelength passing through the external resonator; a first laser beam with the second wavelength emitted from the external resonator and a second laser beam with the second wavelength emitted from the optical path conversion element away from the light source being used as an output light beam; and the optical path conversion element including: