期刊
LASER PHYSICS
卷 27, 期 8, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1555-6611/aa7834
关键词
injection-locking; spectroscopy; hyperfine structure
资金
- Academy of Finland under Finnish Centre of Excellence Programme [213513]
- European Unions Horizon research and innovation programme (ENSAR2) [654002]
- Academy of Finland (AKA) [213513, 213513] Funding Source: Academy of Finland (AKA)
A high repetition rate pulsed Ti:sapphire laser injection-locked to a continuous wave seed source is presented. A spectral linewidth of 20 MHz at an average output power of 4 W is demonstrated. An enhanced tuning range from 710-920 nm with a single broadband mirror set is realized by the inclusion of a single thin birefringent quartz plate for suppression of unseeded emission. The spectral properties have been analyzed using both a scanning Fabry-Perot interferometer as well as crossed beam resonance ionization spectroscopy of the hyperfine levels of natural copper. Delayed ionization of the long-lived excited state is demonstrated for increased resolution. For the excited state hyperfine coupling constant of the 244 nm 4s S-2(1/2) -> 4s4p(4)P degrees(1/2) ground-state transition in 63Cu, a factor of ten reduction in error compared to previous literature was achieved. The described laser system has been in operation at several radioactive ion beam facilities.
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