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Related Experiment Video

Updated: May 8, 2026

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
14:18

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Published on: February 28, 2016

VCSEL-powered and polarization-maintaining fiber-optic grating vector rotation sensor.

Tuan Guo1, Fu Liu, Fa Du

  • 1Institute of Photonics Technology, Jinan University, Guangzhou 510632, China. tuanguo@jnu.edu.cn

Optics Express
|August 14, 2013
PubMed
Summary

This study introduces a compact fiber-optic vector rotation sensor using polarization-maintaining fiber Bragg gratings. It achieves unambiguous rotation measurement with high sensitivity and signal-to-noise ratio using a VCSEL, eliminating the need for demodulation filters.

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Last Updated: May 8, 2026

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Published on: January 7, 2019

Area of Science:

  • Optoelectronics
  • Fiber Optics Sensors
  • Photonics

Background:

  • Fiber Bragg gratings (FBGs) are widely used in optical sensing.
  • Polarization-maintaining (PM) fibers offer unique properties for optical measurements.
  • Accurate vector rotation sensing is crucial in various industrial and scientific applications.

Purpose of the Study:

  • To propose and demonstrate a compact fiber-optic sensor for vector rotation measurement.
  • To achieve high sensitivity and unambiguous angle determination.
  • To enhance sensor performance using a vertical cavity surface emitting laser (VCSEL).

Main Methods:

  • Splicing a polarization-maintaining (PM) fiber stub with a fiber Bragg grating (FBG) to single-mode fiber without lateral offset.
  • Utilizing the intrinsic birefringence of PM fiber to create two orthogonally polarized FBG core modes.
  • Employing a commercial VCSEL matched to the PM-FBG core modes for illumination.

Main Results:

  • Achieved two well-defined resonances with 0.5 nm wavelength separation, sensitive to fiber rotation.
  • Demonstrated unambiguous determination of orientation and angle via relative amplitude power detection.
  • Obtained a vector rotation measurement sensitivity of 0.09 dB/deg with effective referencing of power fluctuations and temperature perturbations.

Conclusions:

  • The proposed compact fiber-optic sensor enables accurate and unambiguous vector rotation measurement.
  • Using a VCSEL significantly improves the signal-to-noise ratio and simplifies the system.
  • The sensor offers a cost-effective and robust solution for rotation sensing applications.