Direct semiconductor diode laser system for an optical lattice clock based on neutral strontium for future tests of fundamental physics in space

Vladimir Schkolnik; Jason R. Williams; Nan Yu

doi:10.1117/12.2549377

25 February 2020 Direct semiconductor diode laser system for an optical lattice clock based on neutral strontium for future tests of fundamental physics in space

Vladimir Schkolnik, Jason R. Williams, Nan Yu

Author Affiliations +

Proceedings Volume 11296, Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology II; 112962H (2020) https://doi.org/10.1117/12.2549377
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

We present the design and the status of an optical lattice clock at Jet Propulsion Laboratory (JPL) based on bosonic ⁸⁸Sr atoms with an emphasis on the laser system. The design of the clock aims for future implementation and science applications in space. The atomic source employs a two-dimensional magneto-optical trap realized with permanent magnets and a simple dispenser-based atomic oven. This design results in a low system size, weight and power, suppresses thermal atoms in the clock interrogation zone, and eliminates hot blackbody radiation in the science cell. The laser system utilizes exclusively direct diode lasers without second harmonic generation to minimize the complexity and power consumption of the overall system. The clock interrogation laser at 698nm and the laser for the second cooling stage at 689nm are both locked to the same high finesse optical cavity to further reduce the size of the system. Future paths to system miniaturization are also discussed.

Citation Download Citation

Vladimir Schkolnik, Jason R. Williams, and Nan Yu "Direct semiconductor diode laser system for an optical lattice clock based on neutral strontium for future tests of fundamental physics in space", Proc. SPIE 11296, Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology II, 112962H (25 February 2020); https://doi.org/10.1117/12.2549377

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