The WA-650 Wavemeter converts a WA-1500 or WA-1000 Laser Wavelength Meter into a high-resolution laser spectrum analyzer, resulting in more complete characterization of laser spectral performance. The WA-650 automatically derives a laser’s spectral characteristics from the Fourier transform of the temporal interference fringe signal from the Wavemeter laser wavelength meter. It interfaces with a PC via USB, and special Windows-based software generates the laser spectrum for display or more detailed analysis.