Patent ID: 8699123
Filing Date: 2014-04-15
Classification: G02F,G03B,H01S,H04N

Abstract:
1. A wavelength conversion laser light source, comprising: a laser light source configured to generate fundamental wave laser light; and a wavelength conversion element including a wavelength conversion region configured to convert the fundamental wave laser light incident from the laser light source into different laser light in wavelength, wherein the wavelength conversion element has optically polished end surfaces configured to transmit or reflect the fundamental wave laser light; and a non-wavelength-converting region for the wavelength of the fundamental wave laser light is provided between at least one of the optically polished end surfaces and the wavelength conversion region, and the wavelength conversion element is a birefringent phase matched wavelength conversion element in which a polarization reversal direction of the wavelength conversion region is consistent, and a polarization reversal structure is provided in the non-wavelength-converting region.