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All of these holographic and interferometric techniques require single-frequency or single-longitudinal-mode (SLM) lasers in the visible spectrum with long coherence length, excellent wavelength stability and precision, as well as high, stable output powers. As the applications of these techniques are transitioning from laboratory settings to production-scale environments the demands on performance reliability and stability over long time periods and variable environmental conditions are increasing. Here we present how combining a robust optical assembly technology with advanced procedures for laser optimization and performance verification enables manufacturing of high power SLM lasers that deliver robust spectral performance over long time periods and in varying environmental conditions. We will demonstrate a novel automated SLM test procedure that ensures stable single-frequency performance and show wavelength stability over large temperature cycles. |
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