Optical frequency comb on potassium D1 resonance line (CROSBI ID 610508)
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Podaci o odgovornosti
Rakić, Mario ; Pichler, Goran
engleski
Optical frequency comb on potassium D1 resonance line
We present direct observation of the velocity-selective optical pumping of the potassium (39K) ground state hyperfine levels induced by 5s2S1/2 5p2P1/2 (D1 transition) femtosecond pulse-train excitation. Experiment has been performed with a modified direct frequency comb spectroscopy. Spectra physics Tsunami mode locked Ti:sapphire laser with duration of the pulse of about 100 fs and a repetition rate of about 80 MHz has been used as a pump laser and it was centered on D1 transition. Weak Toptica ECDL had been used as a probe laser. It was also centered on the same transition and had a linewidth less than 1 MHz. We observed how the optical frequency comb was inprinted on the Doppler profile of the resonance line. Theoretical calculation has also been performed and it is in very good agreement with experiment. In addition we show the interaction of the frequency comb and potassium atoms in external magnetic field from 0 to 75 Gauss. In that range we found oscillations in the intensity of modulations (amplitude of the comb fringes).
frequency comb; femtosecond laser; potassium; spectroscopy
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Podaci o prilogu
33-33.
2014.
objavljeno
Podaci o matičnoj publikaciji
Programme and book of abstracts
Krstulović, Nikša ; Kregar, Zlatko
Zagreb: Hrvatsko Vakuumsko Društvo (HVD)
978-953-98154-3-9
Podaci o skupu
21st International scientific meeting on vacuum science and techniques
poster
01.01.2014-01.01.2014
Samobor, Hrvatska