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Mode-order converter in a multimode waveguide.

Byung-Tak Lee1, Sang-Yung Shin

  • 1Department of Electrical Engineering, Korea Advanced Institute of Science and Technology, 373-1, Kusong-dong, Yusong-gu, Taejon 305-701, Korea.

Optics Letters
|September 19, 2003
PubMed
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Researchers developed a new integrated-optic device to reorder modes in multimode waveguides. This device, operating at 1.55 micrometers, shows promise for advanced optical communication systems.

Area of Science:

  • Integrated optics
  • Waveguide technology
  • Optical communication

Background:

  • Controlling light propagation in multimode waveguides is crucial for optical communication.
  • Existing methods for mode manipulation can be complex or inefficient.

Purpose of the Study:

  • To propose and fabricate a novel device for reordering modes in integrated-optic multimode waveguides.
  • To experimentally validate the device's functionality and performance.

Main Methods:

  • Device fabrication using integrated-optic techniques.
  • Characterization of device operation at a 1.55 micrometer wavelength.
  • Measurement of output mode profiles and optical crosstalk.
  • Quantification of excess loss compared to a straight waveguide.

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Main Results:

  • Successful fabrication of the proposed mode-ordering device.
  • Confirmation of device operation via observation of output mode profiles.
  • Achieved crosstalk of >10.2 dB using an indirect measurement method.
  • Measured excess loss of 1.5 dB relative to a straight multimode waveguide.

Conclusions:

  • The novel device effectively reorders modes in integrated-optic multimode waveguides.
  • The device demonstrates practical performance suitable for optical communication applications.
  • Further optimization could potentially reduce excess loss and improve crosstalk.