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Proceedings Paper

An auto-locked diode laser system for precision metrology
Author(s): H. C. Beica; A. Carew; A. Vorozcovs; P. Dowling; A. Pouliot; G. Singh; A. Kumarakrishnan
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Paper Abstract

We describe a diode laser system for precision metrology that relies on adaptations of a well-known design based on optical feedback from an interference filter. The laser head operates with an interchangeable base-plate, which allows for single-mode performance at distinct wavelengths of 633 nm and 780 nm. Frequency drifts are effectively suppressed by using a vacuum-sealed laser head, thereby allowing the laser frequency to be stabilized on time-scales of several hours. Using a digital auto-lock controller, we show that the laser frequency can be stabilized with respect to selected iodine and rubidium spectral lines. The controller can be programmed to use a pattern-matching algorithm or generate first- and third-derivative error signals for peak locking. Beat note characterization has demonstrated a short-term linewidth of ~2 MHz and an Allan deviation of 3.5 × 10-9 for a measurement time τ = 500 s. The laser characteristics have also enabled high-precision gravity measurements with accuracies of a few parts-per-billion (ppb).

Paper Details

Date Published: 24 February 2017
PDF: 6 pages
Proc. SPIE 10086, High-Power Diode Laser Technology XV, 100860W (24 February 2017); doi: 10.1117/12.2250653
Show Author Affiliations
H. C. Beica, York Univ. (Canada)
A. Carew, York Univ. (Canada)
A. Vorozcovs, York Univ. (Canada)
P. Dowling, York Univ. (Canada)
A. Pouliot, York Univ. (Canada)
G. Singh, York Univ. (Canada)
A. Kumarakrishnan, York Univ. (Canada)

Published in SPIE Proceedings Vol. 10086:
High-Power Diode Laser Technology XV
Mark S. Zediker, Editor(s)

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