Title :
Ideal microlens design for flatting the equiphase distribution of a Gaussian laser beam
Author :
He, Yongzhi ; Shi, Frank G.
Author_Institution :
Henry Samueli Sch. of Egineering, Univ. of California, Irvine, CA, USA
Abstract :
An ideal microlens profile for flatting the equiphase distribution of a Gaussian laser beam is obtained analytically by a new design tool based on the combination of Gaussian beam theory and ray optics. A comparative study with similar microlens design by ray tracing technique is performed by using a wide-angle beam propagation method with (2, 2) Pade´ order expansion. The results show that a substantial improvement of lens profile design accuracy can be achieved by employing this new design tool.
Keywords :
Helmholtz equations; aspherical optics; finite difference methods; laser beams; microlenses; optical design techniques; ray tracing; Gaussian beam theory; Gaussian laser beam; Helmholtz equation; Pade expansion; aspheric lens; design tool; equiphase distribution flatting; ideal microlens profile; paraxial approximation; quality factor; ray tracing; wide-angle beam propagation method; Fiber lasers; Laser beams; Laser theory; Lenses; Microoptics; Optical coupling; Optical design; Optical propagation; Ray tracing; Surface emitting lasers;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2003.820107
