飞秒光梳和碘稳频532nm Nd∶YAG激光频率的测量

Femtosecond frequency comb and optical frequency measurement of 532nm Nd∶YAG laser

报道了中国计量科学研究院研制的基于掺钛蓝宝石(Ti:Sapphire)锁模飞秒脉冲激光器的飞秒光学频率梳装置,并利用此装置测量了碘稳频532nm(127I2R(56)32-10)Nd∶YAG固体激光器的频率,结果为563260223512991±20Hz,相对不确定度为3.6×10-14.这一数值是直接溯源到铯原子微波频率基准的光学频率测量结果.

In this paper we report on the Ti： sapphire mode-locked femtosecond laser based optical frequency comb apparatus and developed by NIM its application in optical frequency measurement of the I2 stabilized 532 nm Nd ： YAG laser installed in NIM. The measurement result of ^127 I2 R（56）32-10 hyperfine transition is 563260223512991 ± 20 （Hz）, with a relative frequency uncertainty of 3.6 × 10^-14. To our knowledge, this result is the first optical frequency measurement in China which is referenced directly to the Cs microwave frequency standard.