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• 1. [Article] Effects of Focusing-Beam Field Variations on the Stability of Laser Oscillators

  Semiclassical models for the dynamical behavior of single-longitudinal-mode, homogeneously broadened, unidirectional ring-laser oscillators have long been available. However, in most of these models the ...

  Citation × Citation Citation Abstract Copy Title: Effects of Focusing-Beam Field Variations on the Stability of Laser Oscillators Author: Chenkosol, Pitak, Casperson, Lee W. Year: 2005 Semiclassical models for the dynamical behavior of single-longitudinal-mode, homogeneously broadened, unidirectional ring-laser oscillators have long been available. However, in most of these models the beam's cross section is assumed to be independent of longitudinal position in the laser, while in practical laser systems it is common for the diameter to vary with position. A model for lasers with focusing-beam field variations is developed here. Linear stability analysis shows that higher values of excitation are required to reach the type 1 instability threshold for lasers with longitudinal variations of the beam diameter than for the uniform plane-wave laser model. Title: Effects of Focusing-Beam Field Variations on the Stability of Laser Oscillators Author: Chenkosol, Pitak, Casperson, Lee W. Year: 2005 Semiclassical models for the dynamical behavior of single-longitudinal-mode, homogeneously broadened, unidirectional ring-laser oscillators have long been available. However, in most of these models the beam's cross section is assumed to be independent of longitudinal position in the laser, while in practical laser systems it is common for the diameter to vary with position. A model for lasers with focusing-beam field variations is developed here. Linear stability analysis shows that higher values of excitation are required to reach the type 1 instability threshold for lasers with longitudinal variations of the beam diameter than for the uniform plane-wave laser model. Close

• 2. [Article] Generalized Beam Matrices. II. Mode Selection in Lasers and Periodic Misaligned Complex Optical Systems

  A generalized beam matrix method is used to investigate the mode structure of astigmatic misaligned optical systems with loss or gain. In these optical systems the usual real-argument polynomial-Gaussian ...

  Citation × Citation Citation Abstract Copy Title: Generalized Beam Matrices. II. Mode Selection in Lasers and Periodic Misaligned Complex Optical Systems Author: Casperson, Lee W., Tovar, Anthony A. Year: 1996 A generalized beam matrix method is used to investigate the mode structure of astigmatic misaligned optical systems with loss or gain. In these optical systems the usual real-argument polynomial-Gaussian beams are not eigenfunctions, and off-axis complex-argument polynomial beams must be used. New beam transformations for these complex-argument modes are reported. Stability criteria are developed, and mode selection in laser resonators that contain tilted, displaced, or curved complex optical elements is discussed. Title: Generalized Beam Matrices. II. Mode Selection in Lasers and Periodic Misaligned Complex Optical Systems Author: Casperson, Lee W., Tovar, Anthony A. Year: 1996 A generalized beam matrix method is used to investigate the mode structure of astigmatic misaligned optical systems with loss or gain. In these optical systems the usual real-argument polynomial-Gaussian beams are not eigenfunctions, and off-axis complex-argument polynomial beams must be used. New beam transformations for these complex-argument modes are reported. Stability criteria are developed, and mode selection in laser resonators that contain tilted, displaced, or curved complex optical elements is discussed. Close