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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 9 — May. 6, 2013
  • pp: 10969–10977

Mid-infrared supercontinuum generation in As2S3-silica “nano-spike” step-index waveguide

N. Granzow, M. A. Schmidt, W. Chang, L. Wang, Q. Coulombier, J. Troles, P. Toupin, I. Hartl, K. F. Lee, M. E. Fermann, L. Wondraczek, and P. St.J. Russell  »View Author Affiliations


Optics Express, Vol. 21, Issue 9, pp. 10969-10977 (2013)
http://dx.doi.org/10.1364/OE.21.010969


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Abstract

Efficient generation of a broad-band mid-infrared supercontinuum spectrum is reported in an arsenic trisulphide waveguide embedded in silica. A chalcogenide “nano-spike”, designed to transform the incident light adiabatically into the fundamental mode of a 2-mm-long uniform section 1 µm in diameter, is used to achieve high launch efficiencies. The nano-spike is fully encapsulated in a fused silica cladding, protecting it from the environment. Nano-spikes provide a convenient means of launching light into sub-wavelength scale waveguides. Ultrashort (65 fs, repetition rate 100 MHz) pulses at wavelength 2 µm, delivered from a Tm-doped fiber laser, are launched with an efficiency ~12% into the sub-wavelength chalcogenide waveguide. Soliton fission and dispersive wave generation along the uniform section result in spectral broadening out to almost 4 µm for launched energies of only 18 pJ. The spectrum generated will have immediate uses in metrology and infrared spectroscopy.

© 2013 OSA

OCIS Codes
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(060.2390) Fiber optics and optical communications : Fiber optics, infrared
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
(060.7140) Fiber optics and optical communications : Ultrafast processes in fibers
(320.6629) Ultrafast optics : Supercontinuum generation

ToC Category:
Ultrafast Optics

History
Original Manuscript: February 11, 2013
Revised Manuscript: April 3, 2013
Manuscript Accepted: April 8, 2013
Published: April 26, 2013

Citation
N. Granzow, M. A. Schmidt, W. Chang, L. Wang, Q. Coulombier, J. Troles, P. Toupin, I. Hartl, K. F. Lee, M. E. Fermann, L. Wondraczek, and P. St.J. Russell, "Mid-infrared supercontinuum generation in As2S3-silica “nano-spike” step-index waveguide," Opt. Express 21, 10969-10977 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-9-10969


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