| 摘要 |
<p>A line narrowing system in which a polarizing beam splitter (22), a polarization rotator (24) and a reflecting optic (14) are configured to cause light in an expanded beam from a laser gain medium to illuminate a grating (16) at least twice in each pass through the line narrowing system before returning to the gain medium (3) for further amplification. In a preferred embodiment, the grating is an echelle grating arranged in a Littrow configuration.</p> |
