Asymmetrical virtual telecentric laser diode line/array source model for use in microlaser pumping design and analysis

摘要

Discussed will be the development of a model for both a line laser diode as well as an area array consisting of line laser diode elements. The need for this work comes from the difficult task of using a single strip laser diode with dimensions such as 1 centimeter in the y direction and 1 micron in the x direction while exhibiting substantially different divergences in each axis as well. The intention is to create a fairly uniform optical pump beam in both the x and the y axis through as much of the gain media as possible. The modeled, virtual diode, is telecentric only in the long or "flow" axis where the divergence is generally less than the diode's "fast" axis. The virtual diode model is used as a source in a lens design software program to predict performance of diodes and their accompanying optics as pump sources for micro-lasers. Corroboration between the model and actual systems have been experimentally verified and will be presented. The single, linear laser diode source is used as the basis for a laser diode array model is also presented.