| 摘要 |
PROBLEM TO BE SOLVED: To disclose a miniature coherent light source comprising a laser radiating an incident wave at a wavelength ofλoi , and a nonlinear medium where a phase matching state is confirmed at a wavelengthλoa belonging to a set of values ofλoi . SOLUTION: The light source comprises two dichroic mirrors M1, M2 disposed at the inlet and outlet of a nonlinear medium having a high transparency at a wavelength ofλoi and a high reflectance at a wavelength ofλoi /2. With such a structure, laser emission is fixed at the wavelengthλoa , light wave is taken out at the wavelengthλoa /2 and emission power can be amplified at the wavelengthλoa /2. Application field of the invention is a blue light source. |
