High-accuracy wavemeter based on a stabilized diode laser
Ayan Banerjee, Umakant D. Rapol, Ajay Wasan, Vasant Natarajan
Abstract
We have built a high-accuracy wavelength meter for tunable lasers using a scanning Michelson interferometer and a reference laser of known wavelength. The reference laser is a frequency stabilized diode laser locked to an atomic transition in Rb. The wavemeter has a statistical error per measurement of 5 parts in 107 which can be reduced considerably by averaging. Using a second stabilized diode laser, we have verified that systematic errors are below 4 parts in 108.
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