A rubidium-stabilized ring-cavity resonator for
optical frequency metrology: precise measurement of the
D1 line in 133Cs |
| |
| Authors: | D Das A Banerjee S Barthwal V Natarajan |
| |
| Institution: | (1) Department of Physics, Indian Institute of Science, 560012 Bangalore, India |
| |
| Abstract: | We have developed a ring-cavity resonator that
can be used to measure the absolute frequencies of optical
transitions with an uncertainty below 40 kHz. The length
of the resonator is calibrated against a reference laser
locked to the D2 line of 87Rb, the frequency of
which is known with 6 kHz accuracy. We demonstrate the
power of this technique by measuring the absolute
frequencies of various hyperfine transitions in the D1
line of 133Cs. Our results agree with earlier
measurements using the frequency-comb technique, and have
similar accuracy. Measurement of the D1-line frequency
could lead to a more precise determination of the
fine-structure constant. We also report a precise value of
A=291.918(8) MHz for the hyperfine constant in the
6P1/2 state. |
| |
| Keywords: | 06 30 Ft Time and frequency 42 62 Eh Metrological applications optical frequency synthesizers for precision spectroscopy 32 10 Fn Fine and hyperfine structure |
| 本文献已被 SpringerLink 等数据库收录！ |
