Galzerano G, Svelto C, Bava E, Bertinetto F
Dipartimento 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.
Appl Opt. 1999 Nov 20;38(33):6962-6. doi: 10.1364/ao.38.006962.
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.
调频光谱技术已应用于两台倍频钕钇铝石榴石激光器，以实现相对于532nm处rovibronic P(54) 32 - 0碘线超精细结构成分的绝对频率稳定。对于1ms < τ < 10s范围内的积分时间，已获得2×10⁻¹³ τ⁻¹/₂的分数频率稳定性。对于更长的积分时间，稳定性水平保持在10⁻¹³以下，在100s时达到最小值4.6×10⁻¹⁴。据我们所知，这种高稳定性水平是通过这种锁定方法并针对完全可运输系统在碘线方面取得的最佳值。
