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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 25 — Sep. 1, 2011
  • pp: E108–E111

Ultrabroadband flattop wavelength conversion based on cascaded sum frequency generation and difference frequency generation using pump detuning in quasi-phase-matched lithium niobate waveguides

Meenu Ahlawat, Amirhossein Tehranchi, Chang Qing Xu, and Raman Kashyap  »View Author Affiliations


Applied Optics, Vol. 50, Issue 25, pp. E108-E111 (2011)
http://dx.doi.org/10.1364/AO.50.00E108


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Abstract

Flattop wavelength conversion over a 70 nm bandwidth in a 45 -mm -long periodically poled lithium niobate (PPLN) waveguide based on nonlinear cascaded sum frequency generation (SFG) and difference frequency generation processes using two separated wavelengths, is realized. A 2 dB peak-to-peak ripple over the conversion bandwidth in the C band is observed when the two pumps are fixed for perfectly phase-matched SFG conversion; this is significantly reduced to 0.5 dB by slight detuning of one of the pumps to a longer wavelength. We also demonstrate multichannel broadcasting using two pumps to convert one signal wavelength to three idlers. Using the aperiodically poled lithium niobate waveguide increases the idler separation.

© 2011 Optical Society of America

OCIS Codes
(190.0190) Nonlinear optics : Nonlinear optics
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4390) Nonlinear optics : Nonlinear optics, integrated optics

History
Original Manuscript: March 16, 2011
Revised Manuscript: July 1, 2011
Manuscript Accepted: July 6, 2011
Published: August 8, 2011

Citation
Meenu Ahlawat, Amirhossein Tehranchi, Chang Qing Xu, and Raman Kashyap, "Ultrabroadband flattop wavelength conversion based on cascaded sum frequency generation and difference frequency generation using pump detuning in quasi-phase-matched lithium niobate waveguides," Appl. Opt. 50, E108-E111 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-25-E108

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