Abstract
Precise knowledge of a laser’s wavelength is crucial for
applications from spectroscopy to telecommunications. Here, we present
a wavemeter that operates on the Talbot effect. Tone parameter
extraction algorithms are used to retrieve the frequency of the
periodic signal obtained in the sampled Talbot interferogram.
Theoretical performance analysis based on the Cramér–Rao
lower bound as well as experimental results are presented and
discussed. With this scheme, we experimentally demonstrate a compact
and high-precision wavemeter with below 10 pm single-shot
estimation uncertainty under the criterion around 780 nm.
© 2019 Optical Society of
America
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