High-efficiency Raman conversion in SF6- and CF4-filled hollow-core photonic bandgap fibers

We present a comparative experimental investigation of vibrational stimulated Raman scattering in hollow-core photonic bandgap fibers pressurized with sulfur hexafluoride (SF6) and tetrafluoromethane (CF4) gases. Nanosecond-duration pulses at a wavelength of 1030 nm are coupled into the gas-filled f...

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Bibliographic Details
Published in:Optics letters 2019-12, Vol.44 (23), p.5856-5859
Main Authors: Edelstein, Shahar, Ishaaya, Amiel A
Format: Article
Language:English
Subjects:
Conversion
Efficiency
Fibers
Gases
Photonic band gaps
Photonics
Raman spectra
Sulfur hexafluoride
Tetrafluoromethane
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Summary:We present a comparative experimental investigation of vibrational stimulated Raman scattering in hollow-core photonic bandgap fibers pressurized with sulfur hexafluoride (SF6) and tetrafluoromethane (CF4) gases. Nanosecond-duration pulses at a wavelength of 1030 nm are coupled into the gas-filled fiber, and the first and second Stokes orders are measured at the fiber output. We characterize the conversion process as a function of gas, fiber length, and input power. With a 15 m fiber filled with SF6, we obtain conversion efficiency to the first Stokes of 55.7% at an input peak power of 0.63 kW. In comparison, with CF4, we obtained a higher conversion threshold and maximum conversion efficiency of 45.4%. To the best of our knowledge, this is the first reported conversion experiment with hollow-core fibers filled with SF6 gas.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.44.005856