A resonator structure in which one reflector is replaced by a biprismlike reflecting surface is investigated theoretically. It is shown that such a modification leads to two regions of parameters, each with different regimes of mode selection. The first region has an improved laser power output because of the nearly flat-top mode shape. In the second region the biprism is inverted, with the result that the main oscillating mode can be the first odd mode. The line singularity contained in such a mode is one example of singular beams that are employed in various fields, such as micromanipulators and advanced high-resolution metrology.
© 2005 Optical Society of America
Original Manuscript: August 13, 2004
Revised Manuscript: November 4, 2004
Manuscript Accepted: November 7, 2004
Published: May 1, 2005
Yurij Parkhomenko, Boris Spektor, and Joseph Shamir, "Two regions of mode selection in resonators with biprismlike elements," Appl. Opt. 44, 2546-2552 (2005)