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Single-chip integrated transmitters and receivers.

Larry A Coldren1, Leif A Johansson, Mingzhi Lu

  • 1Department of Electrical and Computer Engineering, University of California, Santa Barbara, California 93106, USA. coldren@ece.ucsb.edu

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Photonic integrated circuits offer significant advantages over traditional optics, enabling unique functions like high-bandwidth optical phase-locked loops (OPLLs) for advanced coherent optics applications.

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Area of Science:

  • Photonics
  • Integrated Optics
  • Optical Communications

Background:

  • Traditional optics face limitations in size, weight, power consumption, and cost.
  • Photonic integrated circuits (PICs) offer superior performance and unique functionalities.
  • PICs are crucial for advancing coherent optical systems.

Purpose of the Study:

  • To highlight the advantages of PICs in optical systems.
  • To demonstrate the application of PICs in realizing unique functions.
  • To showcase the development of high-performance optical phase-locked loops (OPLLs) using PICs.

Main Methods:

  • Leveraging the size and stability of PICs.
  • Implementing optical phase-locked loop (OPLL) based transmitters and receivers.
  • Utilizing photonic integration to enhance loop bandwidth.

Main Results:

  • PICs provide advantages in size, weight, performance, reliability, power consumption, and cost.
  • PICs enable unique functions in coherent optics, such as advanced OPLLs.
  • Achieved stable OPLLs with closed-loop bandwidths exceeding 1 GHz through photonic integration.

Conclusions:

  • Photonic integration significantly enhances the capabilities of optical systems.
  • PICs are key to developing next-generation coherent optical technologies.
  • High-bandwidth and stable OPLLs are achievable with PICs, paving the way for improved optical communication systems.