Optically pumped rubidium as a frequency standard at 196 THz |
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Authors: | Breton M Tremblay P Julien C Cyr N Tetu M Latrasse C |
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Affiliation: | Dept. de Genie Electr., Laval Univ., Que.; |
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Abstract: | The performance of 196.0-THz (1529-nm) DFB lasers frequency-locked to absorption lines of a rubidium vapor optically pumped at 384.2 THz (780.2 nm) is studied. The absorption profiles of the pumped vapor are measured under various conditions and compared with theoretical predictions. A bright resonance resulting from the cascade of two cycling transitions is characterized both experimentally and theoretically. The measured frequency stability of a DFB laser frequency-locked to this line reaches a level of 2×10-10 for an averaging time of 100 s when compared to a similar laser locked to an acetylene line |
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