2019
DOI: 10.1088/1361-6463/ab36f5
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A simple, low cost and robust method for measurement of the zero-crossing temperature of an ultralow expansion cavity

Abstract: We present a simple, low cost and robust method to measure zero-crossing temperature (ZCT) of an ultralow expansion (ULE) cavity. Low cost fiber electro-optic modulator (EOM) and free space EOM as a frequency bridge and a frequency ruler respectively are used to precisely measure the frequency of cavity mode relative to atom transition which acts as an absolute reference frequency. Neither an expensive optical frequency comb and another ULE cavity-based stabilized laser for reference frequency, nor Pound-Dreve… Show more

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Cited by 7 publications
(1 citation statement)
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“…This cavity was housed in a passive heat shield in a vacuum system and was actively temperature stabilized at the zero-crossing temperature where the CLFD will be almost linear. 26) Both the clock laser system and the ULE cavity setups were mounted on a passive vibration isolation platform. After the clock laser being well stabilized to the ULE cavity, the noises of the output laser were dominated by frequency drift f drift and thermal noise f thermal of the cavity.…”
mentioning
confidence: 99%
“…This cavity was housed in a passive heat shield in a vacuum system and was actively temperature stabilized at the zero-crossing temperature where the CLFD will be almost linear. 26) Both the clock laser system and the ULE cavity setups were mounted on a passive vibration isolation platform. After the clock laser being well stabilized to the ULE cavity, the noises of the output laser were dominated by frequency drift f drift and thermal noise f thermal of the cavity.…”
mentioning
confidence: 99%