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Wavelength Meter Theory: Michelson Interferometry

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Wavelength Meter Theory: Michelson Interferometry

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The WA-1500/1000 Wavemeter® systems uses a Michelson interferometer-based design to generate temporal fringes that are measured against a well-characterized reference laser. For example, the standard Michelson interferometer shown in Figure 1 generates wavelength information from the optical interference of two beams that originate from the same source. The incident beam is split between a fixed path and a smoothly varying path. Both beams are reflected back and recombined at the beamsplitter to produce a sinusoidal interference pattern that is a result of the smoothly changing phase relationship between the beams.

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