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Compact ultrastable lasers supporting fundamental physics in space

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Compact ultrastable lasers supporting fundamental physics in space

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  • Author: Scott Diddams, Frank Quinlan, Peter Rakich
Potential scientific discoveries utilizing high precision optical clocks in space include dark matter searches, local Lorentz invariance tests, and tests of general relativity. In addition to the atoms themselves, optical atomic clocks require ultrastable lasers to perform spectroscopy on the clock transition, and whose electric field oscillations serve as the readout “ticks” of the clock. The narrowness of the clock transition requires pre-stabilization of the spectroscopy laser, best performed by locking the laser to a passive reference cavity.

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