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Compact optical temporal differentiator based on silicon microring resonator.

Fangfei Liu1, Tao Wang, Li Qiang

  • 1State Key Lab of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd, Shanghai 200240, China.

Optics Express
|October 1, 2008
PubMed
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We demonstrate a compact silicon microring resonator that acts as a temporal differentiator for optical fields. This device, operating near critical coupling, can process optical signals like Gaussian and sinusoidal pulses at high data rates.

Area of Science:

  • Photonics and optical engineering.
  • Integrated optics and silicon photonics.

Background:

  • Temporal differentiation is crucial for advanced optical signal processing.
  • Existing methods may lack compactness or integration capabilities.

Purpose of the Study:

  • To propose and demonstrate a compact optical temporal differentiator.
  • To leverage silicon microring resonators for first-order optical field differentiation.

Main Methods:

  • Utilizing a silicon microring resonator with a 40 micrometer radius.
  • Operating the resonator near the critical coupling regime.
  • Testing with Gaussian, sinusoidal, and square-like pulses at 10 Gb/s and 5 Gb/s.

Main Results:

  • Experimental demonstration of first-order temporal differentiation of optical fields.

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  • Successful processing of various signal shapes at high data rates.
  • Confirmation of the device's compact size and potential for integration.

    • Conclusions:

    • The silicon microring resonator serves as an effective temporal differentiator.
    • The compact design is suitable for integration with silicon-on-insulator (SOI) platforms.
    • This technology advances optical signal processing capabilities.