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Updated: Jun 19, 2026

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

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

Published on: February 28, 2016

All-fiber polarizer based on a null taper coupler.

T A Birks, D O Culverhouse, S G Farwell

|October 29, 2009

Summary

A novel single-mode all-fiber polarizer was developed using a twisted fused null taper coupler. This new fiber polarizer achieves a 15 dB extinction ratio and 0.2 dB insertion loss, offering improved performance for optical systems.

Area of Science:

Photonics and Optical Engineering
Fiber Optic Technology

Background:

Traditional fiber polarizers often face limitations in performance and integration.
Developing compact and efficient fiber-based polarizing components is crucial for advanced optical systems.

Purpose of the Study:

To report a novel single-mode all-fiber polarizer.
To demonstrate a new design based on fused null taper couplers for polarization control.

Main Methods:

Fabrication of a narrow circularly fused null taper coupler.
Twisting the coupler by 45 degrees post-fabrication to induce polarization.
Characterization of polarizing performance, including extinction ratio and insertion loss.

Main Results:

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Last Updated: Jun 19, 2026

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

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Design and Fabrication of an Optical Fiber Made of Water

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Successful development of a new type of single-mode all-fiber polarizer.

Achieved an extinction ratio of 15 dB.

Measured an insertion loss of 0.2 dB.

Conclusions:

The twisted fused null taper coupler effectively functions as a single-mode all-fiber polarizer.
The demonstrated performance indicates significant potential for this new polarizing device.
Further optimization is expected to yield even better results.