Abstract
Electromagnetically induced transparency (EIT) in and was probed using electro-optic frequency combs generated by applying chirped waveforms to a phase modulator. The carrier tone of the frequency comb served as the pump beam and induced the necessary optical cycling. Comb tooth spacings as narrow as 20 kHz were used to probe potassium in both buffer gas and evacuated cells at elevated temperatures. Atomic absorption features as narrow as 33(5) kHz were observed, allowing for the lower-state hyperfine splitting to be optically measured with a fit uncertainty of 2 kHz. Due to the ultranarrow width of the EIT features, long-lived optical free induction decays were also observed which allowed for background-free detection.
Full Article | PDF ArticleMore Like This
David A. Long and Benjamin J. Reschovsky
OSA Continuum 2(12) 3576-3583 (2019)
Silvia Gozzini, Andrea Fioretti, Alessandro Lucchesini, Luca Marmugi, Carmela Marinelli, Stoyan Tsvetkov, Sanka Gateva, and Stefka Cartaleva
Opt. Lett. 42(15) 2930-2933 (2017)
Shuai Wang, Xinyu Fan, Bingxin Xu, and Zuyuan He
Opt. Lett. 42(19) 3984-3987 (2017)