期刊
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
卷 58, 期 4, 页码 1252-1257出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIM.2008.2007042
关键词
Atomic clocks; frequency control; laser stability; optical phase-locked loops (PLLs); semiconductor lasers
We report on the setup and characterization of a 698-nm master-slave diode laser system to probe the S-1(o)-P-3(o) clock transition of strontium atoms confined in a 1-D optical lattice. A linewidth on the order of about 100 Hz of the laser system has been measured with respect to an ultrastable 657-nm diode laser with 1-Hz linewidth using a femtosecond fiber comb as a transfer oscillator. The laser has been used to measure the magnetically induced S-1(o)-P-3(o) clock transition in Sr-88, where a linewidth of 165 Hz has been observed. The transfer oscillator method provides a virtual beat signal between the two diode lasers that has been used to phase lock the 698-nm laser to the 1-Hz-linewidth laser at 657 nm, transferring its stability to the 698-nm laser system.
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