Frequency Stabilization and Phase Locking of Laser Diodes and Laser Arrays (FY 87)

摘要

The major accomplishments for FY 86 were: 1. Demonstration of efficient coupling of an injection locked laser array single lobe output into a single mode optical fiber. A coupling efficiency of 30% was achieved for a 40-element array emitting 500 mW, corresponding to a fiber output power of 150 mW. 2. Demonstration of a novel external ring laser cavity operation of a gain guided array. The ring cavity relies on self-injection locking of the array by its own spatially filtered output. As in the case of injection locking, the ring laser external cavity results in single diffraction limited lobe far field emission of the array, but with the added advantage of eliminating the need for a separate master laser and the associated wavelength and temperature requirements.