Patent ID: 6795455
Filing Date: 2004-09-21
Classification: H01S,H04N

Abstract:
A light generator comprising:a blue laser for generating a first beam of blue light; a first beamsplitter optically coupled to the blue laser for splitting a second beam of blue light from the first beam of blue light; a second beamsplitter optically coupled to the first beamsplitter for splitting a third beam of blue light from the first beam of blue light; a first upconversion laser optically coupled to the second beamsplitter for generating a beam of green light from the third beam of blue light; and a second upconversion laser optically coupled to the second beamsplitter for generating a beam of red light from the first beam of blue light; wherein at least one of the blue laser, the first upconversion laser, and the second upconversion laser is a solid-state laser; wherein each of the first and second upconversion lasers comprises: a laser gain element; a focusing lens optically coupled to the laser gain element for focusing blue light onto the laser gain element; an input coupler optically coupled to the focusing lens for transmitting blue light and for reflecting red light or green light; and an output coupler optically coupled to the laser gain element for totally reflecting light generated by the laser gain element back to the laser gain element; wherein the laser gain element is a Pr:YALO crystal.