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The HighFinesse Linewidth Analyzer 1k series is the ultimate high-end instrument for measuring, analyzing, and controlling frequency and intensity noise of lasers. This device allows users to conduct analysis of frequency noise density, optical lineshape and relative intensity noise with evaluation of intrinsic and effective linewidth. The extremely fast analysis provides real time measurement and evaluation of noise sources such as servo bumps and frequency drifts. In this demo we demonstrate how to use the LWA-1k 1550 in three different modes – time series, noise, and lineshape analysis. In the time series mode, the digitizer settings are used to adjust he time scale and analyze the linewidth at specific points. In the noise analysis, we measure the intrinsic linewidth and we demonstrate how to find sources of noise to eliminate. Finally, we show how lineshape mode can be used to achieve laser modulation and frequency adjustments to broaden or narrow the linewidth.
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