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Complementary apodized grating waveguides for tunable optical delay lines.

Saeed Khan1, Sasan Fathpour

  • 1CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, FL 32816, USA.

Optics Express
|October 6, 2012
PubMed
Summary

We developed new integrated photonic delay lines offering a balance between performance and size. These tunable devices provide low loss, long delays, and high-speed operation for advanced applications.

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Area of Science:

  • Photonics
  • Integrated Optics
  • Waveguide Technology

Background:

  • Photonic delay lines are crucial for high-speed signal processing.
  • Existing designs often face trade-offs between size, loss, and performance.
  • Tunability and dispersion compensation are key challenges in integrated photonics.

Purpose of the Study:

  • To propose a novel class of high-speed and tunable integrated photonic delay lines.
  • To achieve a compromise between device loss and physical size.
  • To enable effective dispersion compensation for improved signal integrity.

Main Methods:

  • Designing devices with two cascaded apodized grating waveguides.
  • Implementing complementary refractive index profiles for dispersion compensation.
  • Utilizing integrated photonic fabrication techniques.

Main Results:

  • Demonstrated compact tunable delay lines with low optical loss.
  • Achieved long true-time delays and wide tuning ranges.
  • Confirmed high operation bit rates suitable for advanced communication systems.

Conclusions:

  • The proposed integrated photonic delay lines offer a significant advancement in performance and size.
  • These devices provide a viable solution for applications requiring tunable, low-loss, high-speed signal processing.
  • The complementary refractive index modulation effectively compensates for dispersion, enhancing signal quality.