WGM resonators potentially provide excellent optical references for metrology, clocks, spectroscopy, and other applications. However, extremely accurate (below micro-Kelvin) temperature stabilization is required. This software allows one specifically advantageous method of such stabilization to be implemented, which is immune to a variety of effects that mask the temperature variation.WGM Temperature Tracker 2.3 graphic interface." class="caption" align="right">WGM Temperature Tracker 2.3 (see figure) is a LabVIEW code developed for dual-mode temperature stabilization of WGM resonators. It has allowed for the temperature stabilization at the level of 200 nK with onesecond integration time, and 6 nK with 10,000-second integration time, with the above room-temperature set point.
This software, in conjunction with the appropriate hardware, can be used as a noncryogenic temperature sensor/controller with sub-micro- Kelvin sensitivity, which at the time of this reporting considerably outperforms the state of the art.
This work was done by Dmitry V. Strekalov of Caltech for NASA’s Jet Propulsion Laboratory.
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