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Laser-induced Forward Transfer for Flip-chip Packaging of Single Dies
08:21

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Published on: March 20, 2015

Waveguide mode filters fabricated using laser-induced forward transfer.

K S Kaur1, A Z Subramanian, Y J Ying

  • 1Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK. kak@orc.soton.ac.uk

Optics Express
|June 7, 2011
PubMed
Summary
This summary is machine-generated.

Researchers developed titanium-in-diffused lithium niobate waveguide mode filters. Adjusting titanium segment spacing controls refractive index, enabling effective mode filtering for optical applications.

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Area of Science:

  • Photonics and optical engineering
  • Materials science for integrated optics

Background:

  • Lithium niobate (LiNbO3) is a key material for integrated optical devices.
  • Waveguide mode control is crucial for advanced photonic functionalities.
  • Existing fabrication methods for LiNbO3 waveguides can be complex.

Purpose of the Study:

  • To present novel titanium-in-diffused lithium niobate waveguide mode filters.
  • To demonstrate mode control by manipulating titanium segment separation.
  • To characterize the performance and fabrication of these mode filters.

Main Methods:

  • Fabrication using laser-induced forward transfer (LIFT) of titanium.
  • Subsequent thermal diffusion to create in-diffused channel waveguides.
  • Optical characterization including near-field measurements and loss analysis.
  • Device performance modeling.

Main Results:

  • Successful fabrication of titanium-in-diffused lithium niobate waveguide mode filters.
  • Demonstrated mode control by varying the refractive index through titanium segment spacing.
  • Presented detailed fabrication parameters and optical loss measurements.
  • Discussed modeling results validating device performance.

Conclusions:

  • Laser-induced forward transfer followed by thermal diffusion is an effective method for fabricating LiNbO3 waveguide mode filters.
  • The presented approach allows for precise control over waveguide mode properties.
  • These mode filters show potential for advanced integrated photonic circuits.