Rb vapor-cell clock demonstration with a frequency-doubled telecom laser
| Autor: | Christoph Affolderbach, M. Pellaton, Nil Almat, Gaetano Mileti, William Moreno, Florian Gruet |
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| Rok vydání: | 2018 |
| Předmět: |
Clock rate
Physics::Optics 01 natural sciences Instability Noise (electronics) law.invention 010309 optics symbols.namesake Vapor cell Optics law 0103 physical sciences Limit (music) Physics::Atomic Physics Electrical and Electronic Engineering 010306 general physics Engineering (miscellaneous) Physics business.industry Laser Atomic and Molecular Physics and Optics Amplitude Stark effect symbols Telecommunications business |
| Zdroj: | Applied optics. 57(16) |
| ISSN: | 1539-4522 |
| Popis: | We employ a recently developed laser system, based on a low-noise telecom laser emitting around 1.56 μm, to evaluate its impact on the performance of an Rb vapor-cell clock in a continuous-wave double-resonance scheme. The achieved short-term clock instability below 2.5·10−13·τ−1∕2 demonstrates, for the first time, the suitability of a frequency-doubled telecom laser for this specific application. We measure and study quantitatively the impact of laser amplitude and frequency noises and of the ac Stark shift, which limit the clock frequency stability on short timescales. We also report on the detailed noise budgets and demonstrate experimentally that, under certain conditions, the short-term stability of the clock operated with the low-noise telecom laser is improved by a factor of three compared to clock operation using the direct 780-nm laser. |
| Databáze: | OpenAIRE |
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