Absolute frequency measurement of an iodine-stabilized 543-nm He-Ne laser with modulation-synchronized phase-locked loop for improved frequency counting

M. Merimaa, V. Ahtee, K. Nyholm

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    1 Citation (Scopus)

    Abstract

    An iodine-stabilized 543-nm He-Ne laser is an important laser radiation for the realization of the definition of the meter. These secondary standards should be absolutely measured for traceability to the SI-second. Due to the low power of 543-nm He-Ne lasers, a method to improve the signal-to-noise ratio of this measurement is needed. We use a modulation-synchronized phase-locked loop to lock a slave laser without transferring modulation, thus improving the signal-to-noise ratio through reduced bandwidth and higher optical power. The absolute frequency value thus obtained is in good agreement with the CIPM value.

    Original languageEnglish
    Title of host publication2008 Conference on Precision Electromagnetic Measurements Digest, CPEM 2008
    Pages312-313
    Number of pages2
    DOIs
    Publication statusPublished - 23 Sep 2008
    MoE publication typeNot Eligible
    Event2008 Conference on Precision Electromagnetic Measurements Digest, CPEM 2008 - Broomfield, CO, United States
    Duration: 8 Jun 200813 Jun 2008

    Conference

    Conference2008 Conference on Precision Electromagnetic Measurements Digest, CPEM 2008
    Country/TerritoryUnited States
    CityBroomfield, CO
    Period8/06/0813/06/08

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