Mid-infrared supercontinuum generation in tapered chalcogenide fiber for producing octave-spanning frequency comb around 3 μm
Abstract
We demonstrate mid-infrared (mid-IR) supercontinuum generation (SCG) with instantaneous bandwidth from 2.2 to 5 μm at 40 dB below the peak, covering the wavelength range desirable for molecular spectroscopy and numerous other applications. The SCG occurs in a tapered As2S3 fiber prepared by in-situ tapering and is pumped by femtosecond pulses from the subharmonic of a mode-locked Er-doped fiber laser. Interference with a narrow linewidth c.w. laser verifies that the coherence properties of the near-IR frequency comb have been preserved through these cascaded nonlinear processes. With this approach stable broad mid-IR frequency combs can be derived from commercially available near-IR frequency combs without an extra stabilization mechanism.
Additional Information
© 2012 Optical Society of America. Received 11 Jun 2012; revised 14 Aug 2012; accepted 30 Sep 2012; published 8 Oct 2012. The authors would like to thank G. Shambat, C. Phillips, K. Aghaei for invaluable discussions, F. Afshinmanesh for SEM images, T. Marvdashti for experimental support, and M. F. Churbanov and G. E. Snopatin from the Institute of Chemistry of High-Purity Substances for providing the As_2S_3 fiber.Attached Files
Published - oe-20-22-24218.pdf
Submitted - 1208.4155.pdf
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Additional details
- Eprint ID
- 86944
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- CaltechAUTHORS:20180608-151118928
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2018-06-11Created from EPrint's datestamp field
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2021-11-15Created from EPrint's last_modified field