| 摘要 |
A laser comprises an end pump light source and a gain medium having a first end, a second end, and four sides comprising a first, a second, a third, and a fourth side. The end pump light source is optically coupled to the first end and pumps the gain medium. The first side and the third side are tapered inwardly from the first end to the first end to the second end at a taper angle &bgr; relative to a longitudinal lasing axis and have a polished finish capable of reflecting light inside the gain medium. The second side and the fourth side are substantially parallel to the longitudinal lasing axis and have a ground blasted finish. The first side is also tilted inwardly at a slant angle α from the fourth side to the second side. A laser beam R0 exits the second end of the gain medium. |
