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Passive single-mode fiber depolarizer.

P Shen1, J C Palais

  • 1Department of Electrical Engineering, Arizona State University, Tempe, Arizona 85287-5706, USA.

Applied Optics
|February 29, 2008
PubMed
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This study presents a passive fiber optic depolarizer using cascaded couplers to reduce polarization noise. The device effectively minimizes the degree of polarization (DOP) for improved performance in sensitive fiber-optic systems.

Area of Science:

  • Optical Engineering
  • Photonics
  • Fiber Optics

Background:

  • Polarization noise degrades performance in polarization-sensitive fiber-optic systems.
  • Effective depolarization is crucial for stable optical signal transmission.

Purpose of the Study:

  • To analyze and demonstrate a passive single-mode fiber depolarizer.
  • To reduce the degree of polarization (DOP) and eliminate polarization noise.

Main Methods:

  • Utilizing cascaded 2x2 couplers and recirculating delay lines.
  • Employing a commercial laser diode as the light source.
  • Analyzing design criteria and principles for the depolarizer.

Main Results:

  • Achieved a degree of polarization (DOP) below 20 dB with ten cascaded couplers.

Related Experiment Videos

  • Demonstrated further DOP reduction with increased numbers of couplers.
  • Showcased insensitivity to input polarization states.

    • Conclusions:

    • The developed passive fiber depolarizer effectively reduces polarization noise.
    • The device is suitable for polarization-sensitive fiber-optic systems.
    • The design offers a scalable approach for enhanced depolarization.