期刊
OPTICS EXPRESS
卷 17, 期 18, 页码 16017-16026出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.17.016017
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资金
- Air Force Office of Scientific Research [FA9950-05-1-0304]
- National Science Foundation [ECS-0449295]
- Engineering and Physical Sciences Research Council [EP/E039162/1]
- Engineering and Physical Sciences Research Council [EP/E039162/1] Funding Source: researchfish
Saturated absorption spectroscopy reveals the narrowest features so far in molecular gas-filled hollow-core photonic crystal fiber. The 48-68 mu m core diameter of the kagome-structured fiber used here allows for 8 MHz full-width half-maximum sub-Doppler features, and its wavelength-insensitive transmission is suitable for high-accuracy frequency measurements. A fiber laser is locked to the (C2H2)-C-12 nu(1) + nu(3) P(13) transition inside kagome fiber, and compared with frequency combs based on both a carbon nanotube fiber laser and a Cr:forsterite laser, each of which are referenced to a GPS-disciplined Rb oscillator. The absolute frequency of the measured line center agrees with those measured in power build-up cavities to within 9.3 kHz (1 sigma error), and the fractional frequency instability is less than 1.2 x 10(-11) at 1 s averaging time. (C) 2009 Optical Society of America
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