A simplified mathematical model for the far field of a monomode diode laser is employed for easy but fairly accurate computations of the optical field in the focal region. The present treatment is concerned with laser junctions significantly narrower than the wavelength. The field distribution in the plane perpendicular to the diode junction is considered in detail. The results of computations are shown to agree well with the measurements. Hence, the computational code is valuable for the designing of optical devices, such as diode–fiber couplings and laser Doppler anemometers. The present work is not concerned with design calculations for specific applications. Instead, it is intended to illustrate the general features of the proposed mathematical model of monomode diode laser beams.
© 1990 Optical Society of America
Original Manuscript: August 17, 1989
Published: April 20, 1990
Amir Naqwi and Franz Durst, "Focusing of diode laser beams: a simple mathematical model," Appl. Opt. 29, 1780-1785 (1990)