This software implements digital control of a WGM resonator temperature based on the dual-mode approach. It comprises one acquisition and three modules. Interaction proportional-integral loops is designed in original way preventing from fighting. Data processing organized parallel with which allows computational overhead time to be suppressed or often completely avoided.

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.

A Screen Shot of the WGM Temperature Tracker 2.3 graphic interface.

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.

This software is available for commercial licensing. Please contact Daniel Broderick of the California Institute of Technology at This email address is being protected from spambots. You need JavaScript enabled to view it.. NPO-48306

This Brief includes a Technical Support Package (TSP).

WGM Temperature Tracker (reference NPO-48306) is currently available for download from the TSP library.

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