Journal
OPTICS LETTERS
Volume 44, Issue 5, Pages 1150-1153Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.44.001150
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Funding
- National Key Research and Development Program of China [2016YFA0301300]
- National Natural Science Foundation of China (NSFC) [11874342, 91536219]
- Anhui Initiative in Quantum Information Technologies [AHY130000]
- National Science Foundation (NSF) [1640959]
- Packard Foundation
- Directorate For Engineering
- Emerging Frontiers & Multidisciplinary Activities [1640959] Funding Source: National Science Foundation
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To extend the coherence of quantum transitions for laser locking, as well as increase the compactness and stability of the experimental setup, we propose to utilize photonic integrated resonators with high second-harmonic (SH) generation efficiencies as reliable frequency doublers that link the desired frequencies with the frequency references. In this Letter, a sufficiently strong SH signal up to microwatts was generated by a photonic integrated frequency doubler using a milliwatt infrared (IR) laser source. Furthermore, an increased SH generation bandwidth covering R-85(b) and R-87(b) D-2 transition lines, as well as saturated absorption spectroscopy, was demonstrated by tuning the pump power and chip temperature. Here we present, to the best of our knowledge, the first successful locking of an IR laser to Rb saturated absorption lines via a photonic chip frequency doubler. (c) 2019 Optical Society of America
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