Experimental investigation of laser power addition with composite four-mirror cavity

✍ Scribed by M. Lei; M. Gong; H. Zhang; Q. Liu; Y. Wang

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 113 KB
• Volume: 4
• Category: Article
• ISSN: 1612-2011
• DOI: 10.1002/lapl.200610061

✦ Synopsis

Beam combination is an effective geometry which can
improve laser output power with good beam quality. A new and
practical four-mirror cavity configuration is presented to combine
the beams intracavity. This close-ended scheme is good at
withstanding environmental perturbations and is easier to realize
the alignment than the conventional Michelson cavity. The length
of each arm can be rather short which makes the cavity more
compact in practical implement. With this four-mirror cavity, the
output brightness is efficiently improved compared to single F-P
cavity laser by combining two Nd:YAG lasers. A single beam output
exceeding 3.3 W is achieved in this composite cavity, which has
the potential for scaling to much higher output power with high
brightness.