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Arrayed waveguide gratings for telecom and spectroscopic applications

Arrayed waveguide gratings for telecom and spectroscopic applications

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In this book chapter, the performance parameters deteriorate significantly with the increasing number of output waveguides (transmitting channels) and therefore it was necessary to develop new AWG design procedures.

Chapter Contents:

  • 10.1 Arrayed waveguide gratings
  • 10.1.1 AWG principle
  • 10.1.2 Different types of AWGs
  • 10.1.2.1 Low-index contrast AWGs
  • 10.1.2.2 High-index contrast AWGs
  • 10.2 AWG design
  • 10.2.1 Focusing
  • 10.2.2 Dispersion
  • 10.2.3 Free spectral range
  • 10.2.4 Performance parameters
  • 10.2.4.1 Insertion loss
  • 10.2.4.2 Insertion loss uniformity (non-uniformity)
  • 10.2.4.3 Channel crosstalk
  • 10.2.5 AWG design parameters
  • 10.3 AWGs for telecom applications
  • 10.3.1 SoS-based 8-channel, 100-GHz AWG
  • 10.3.1.1 Design
  • 10.3.1.2 Simulation
  • 10.3.1.3 Evaluation of simulated results
  • 10.3.1.4 Fabrication
  • 10.3.1.5 Design verification
  • 10.3.2 SoS-based 64-channel, 50-GHz AWG
  • 10.4 AWGs for spectroscopic applications
  • 10.4.1 Optical coherence tomography
  • 10.4.2 AWG-spectrometer for SD-OCT system
  • 10.4.2.1 Determining minimum separation between PA waveguides
  • 10.4.2.2 Determining minimum separation between output waveguides
  • 10.4.2.3 Optimizing channel crosstalk in high-channel-count AWGs
  • 10.4.2.4 256-channel, 42-GHz AWG-spectrometer for SD-OCT
  • 10.5 Conclusion
  • Acknowledgements
  • References

Inspec keywords: optical waveguides; arrayed waveguide gratings; diffraction gratings

Other keywords: performance parameters; spectroscopic applications; arrayed waveguide gratings; AWG design procedures; telecom; output waveguides; transmitting channels

Subjects: Optical waveguides and couplers; Optical waveguides; Gratings, echelles

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