Power characteristics of planar index-antiguided waveguide lasers with transverse mode competition
Chaofan Wang,
Yuanye Liu,
Lee W. Casperson,
Tsing-Hua Her
Affiliations
Chaofan Wang
1338 Veterans Hwy Apartment A12, Levittown, Pennsylvania 19056, USA
Yuanye Liu
Department of Physics and Optical Science, and Center for Optoelectronics and Optical Communications, The University of North Carolina at Charlotte, 9201 University City Boulevard, Charlotte, North Carolina 28223, USA
Lee W. Casperson
Department of Electrical and Computer Engineering, and Center for Optoelectronics and Optical Communications, The University of North Carolina at Charlotte, 9201 University City Boulevard, Charlotte, North Carolina 28223, USA
Tsing-Hua Her
Department of Physics and Optical Science, and Center for Optoelectronics and Optical Communications, The University of North Carolina at Charlotte, 9201 University City Boulevard, Charlotte, North Carolina 28223, USA
We report comprehensive analysis of output characteristics of homogeneously broadened index-antiguided slab lasers with transverse mode competition. Robust single fundamental mode operation is achieved when the distributive modal loss due to index antiguiding dominates the output coupling loss. Maximal laser efficiency under single fundamental mode operation is investigated numerically for various combinations of single-pass gains and losses. We show analytically that an asymptotic limit of such efficiency exists that is solely determined by the loss ratio between the fundamental and 1st higher-order modes, which equals 66.7% for planar index antiguided lasers.
