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Photonics Design and Solutions

Photonics Spectra
Oct 2001
Epitaxial 'Formula' Makes Better Lasers

Drs. Ivan Hernandez and Alexander Ovtchinnikov

Consistency and repeatability are difficult tasks in diode laser manufacturing, but they are critical for high-volume manufacturing of devices that users can trust to work as promised. Process repeatability, still the nemesis of most semiconductor laser manufacturers, plays a more critical role in commercial success than does achieving record performance parameters.

We have found solid-state molecular beam epitaxy to be a very reliable and reproducible technique for high-power laser diode manufacturing applications. Initial data on high-optical-density operation screening of uncoated devices demonstrate better than 50 percent power efficiency maintained over a wide range of driving currents, peak power efficiency of more than 55 percent and slope efficiency as high as 1.33 W/A…


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