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Published on: July 12, 2017
High-frequency-stability diode-pumped Nd:YAG lasers with the FM sidebands method and Doppler-free iodine lines at 532
G Galzerano1, C Svelto, E Bava
1Dipartimento di Elettronica e Informazione, Politecnico di Milano, Istituto Nazionale di Fisica della Materia and Consiglio Nazionale delle Ricerche, Centro Studi per le Telecomunicazioni Spaziali, Piazza Leonardo da Vinci 32, 20133 Milano, Italy. gianluca.galzerano@polimi.it
Abstract:
The FM spectroscopy technique has been applied to two frequency-doubled Nd:YAG lasers to achieve absolute frequency stabilization against the hyperfine structure components of the rovibronic P(54) 32-0 iodine line at 532 nm. A fractional frequency stability of 2 x 10(-13) tau(-1/2) has been obtained for integration times in the range of 1 ms < tau < 10 s. For longer integration times the stability level remains below 10(-13), reaching a minimum value of 4.6 x 10(-14) at 100 s. This high stability level is, to our knowledge, the best value achieved against iodine lines by this locking method and for a fully transportable system.
