Doppler-broadened methane lines around 3.4 υm are measured with a coherent dual-comb spectrometer with an absolute-frequency axis. The obtained accuracy of the line-center frequency is 300 kHz, about 1 part per thousand of the linewidth.
Proceedings Title: Frontiers in Optics 2011
Conference Dates: October 16-20, 2011
Conference Location: San Jose, CA
Pub Type: Conferences
infrared, spectroscopy, ultrafast lasers