JoVE Journal

Engineering

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Nanyang Technological University

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

A protocol to detect and automate mode locking in a pre-adjusted nonlinear polarization rotation fiber laser is presented. The detection of a sudden change in the output polarization state when mode locking occurs is used to command the alignment of an intra-cavity polarization controller in order to find mode-locking conditions.

Chapters in this video

0:05

Title

0:45

Overview

1:43

Experiment Setup: A Mode-locked Fiber Laser with a Motorized Polarization State Controller

5:46

Analyzing the Polarization of the Output Signal

7:38

Setting Up a Feedback Loop to Automate Polarization Controller Alignment

8:48

Building and Deploying a Rudimentary Polarization Analyzer

12:38

Results: Automation of Mode-locking Using a Discontinuous Jump in the Stokes Parameter S1

13:10

Conclusion

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