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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
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Published on: November 30, 2012

Nonlinear coupling in a planar waveguide.

M Bertolotti1, E Fazio, A Ferrari

  • 1Dipartimento di Energetica, Universitcá degli Studi di Roma 1, Via Scarpa 16, 00167 Rome, Italy.

Optics Letters
|September 22, 2009
PubMed
Summary
This summary is machine-generated.

This study investigates the thermal nonlinear response of a novel waveguide. Coupling efficiency depends on pump power and chopping frequency, with spatial variations observed.

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Area of Science:

  • Materials Science
  • Optics
  • Nonlinear Optics

Background:

  • Waveguides are crucial for optical communication and sensing.
  • Nonlinear optical materials enable advanced photonic devices.
  • Understanding thermal effects is vital for device stability and performance.

Purpose of the Study:

  • To investigate the thermal nonlinear response of a Corning 7059 glass film waveguide on a Corning CS2-61 nonlinear substrate.
  • To analyze the influence of pump power and chopping frequency on waveguide coupling efficiency.
  • To examine the spatial dependence of coupling efficiency within the waveguide.

Main Methods:

  • Pump-probe technique in a quasi-continuous-wave (quasi-cw) regime.
  • Fabrication of a waveguide by sputtering Corning 7059 glass over a Corning CS2-61 substrate.
  • Spatial scanning of the coupling zone using a probe beam.

Main Results:

  • The thermal nonlinear response of the waveguide was successfully characterized.
  • Coupling efficiency was identified as a function of both pump power and chopping frequency.
  • Spatial variations in coupling efficiency were observed and mapped across the coupling zone.

Conclusions:

  • The fabricated waveguide exhibits significant thermal nonlinear optical properties.
  • Pump power and chopping frequency are critical parameters for controlling waveguide coupling.
  • Spatial inhomogeneity in coupling efficiency highlights the importance of localized analysis.