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Related Experiment Video

Updated: May 18, 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

A semiconductor laser with monolithically integrated dynamic polarization control.

B M Holmes¹, M A Naeem, D C Hutchings

¹School of Engineering, University of Glasgow, Oakfield Avenue, Glasgow, G12 8LT, UK. barry.holmes@glasgow.ac.uk

|October 6, 2012

Summary

This summary is machine-generated.

We demonstrate the first semiconductor laser with an integrated active polarization controller. This device allows for high-speed polarization modulation using electrical current injection.

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Area of Science:

Photonics
Semiconductor device physics
Optical engineering

Background:

Monolithic integration of optical components is crucial for advanced photonic systems.
Controlling polarization in semiconductor lasers is essential for various applications, including optical communications and sensing.
Existing methods for polarization control often involve bulky external components or complex fabrication processes.

Purpose of the Study:

To demonstrate the first monolithic integration of a semiconductor laser with an active polarization controller.
To enable high-speed modulation of the laser output polarization.
To provide a compact and efficient solution for polarization control in semiconductor lasers.

Main Methods:

Fabrication of a semiconductor laser chip incorporating a polarization mode converter and a differential phase shifter.
Integration of the polarization controller directly onto the laser gain medium.
Utilizing current injection into the phase shifter section for active polarization control.

Main Results:

Successful monolithic integration of a semiconductor laser and an active polarization controller.
Demonstration of high-speed modulation of the laser output polarization.
Achieved polarization control through electrical means, eliminating the need for external optical elements.

Conclusions:

The developed device represents a significant advancement in integrated photonics.
This technology offers a pathway towards more compact, efficient, and high-speed tunable semiconductor laser sources.
The monolithic approach simplifies device architecture and enhances performance for polarization-dependent applications.