Innovative Techniques for the Production of Low Cost 2D Laser Diode Arrays
Abstract
The objective of this program was to develop a low cost fabrication method for high performance laser diode arrays. The program focussed on reliable and cost-effective ways to grow, assemble and test diode bars of MBE material. Quantum-well laser structures (GRINSH-SQW) were grown on 2 and 3 GaAs substrates. These wafers were photolithographically processed, scribed into bars, and the bars assembled by various techniques. The assemblies were tested for performance, reproducibility, and reliability. The originally proposed assembly, a grooved BeO block, was evaluated and abandoned as unreliable. However, a simplified bar and individual BeO substrate assembly method was developed, and state of the art results achieved on robust 1 cm linear diode arrays, which survived repeated high power testing to power level in excess of 80 watts/bar. This method may be scaled up for multiple bar assemblies without additional complexity by adding laser bars and BeO spacers as required. The BeO sub-mounts are coated prior to assembly in such a fashion to provide a low resistance series connection to each bar in the array, similar to the grooved substrate series connection geometry.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1990
- Accession Number
- ADA223575