SOLID STATE HETEROSTRUCTURE LASER DEVICES FOR OPTICAL RECORDING
Original Publication Date: 1988-Dec-31
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
There are applications for solid state lasers in optical disk memory tracking that require periodical varying of the position of a laser beam for purposes of tracking, which is referred to as beam dithering. A simple way to accomplish this goal is to employ multi-electrode stripe geometry on the laser and modulate the current between two or among several of electrodes at a desired modulation rate. This approach would remove the need for a electromechanical or piezo-electric dither mirror in an optical memory system having a wobble or dither tracking optical disk drive, which type of mirror has low reliability .