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Updated: Jun 23, 2026

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
Published on: February 28, 2016
Polarization correlations in pulsed, vertical cavity, surface-emitting lasers.
Noise and polarization correlations in pulsed vertical-cavity, surface-emitting lasers (VCSELs) are complex. The number of lasing modes significantly impacts polarization correlation, not just a single coefficient.
Area of Science:
- Optics and Photonics
- Semiconductor Lasers
- Quantum Optics
Background:
- Vertical-cavity, surface-emitting lasers (VCSELs) are crucial optoelectronic devices.
- Understanding noise and polarization behavior is vital for VCSEL applications.
- Multitransverse-mode VCSELs exhibit complex output characteristics.
Purpose of the Study:
- To investigate noise behavior in pulsed VCSELs.
- To analyze polarization correlations in multitransverse-mode VCSEL output.
- To determine factors influencing polarization correlation.
Main Methods:
- Simultaneous measurement of laser output in two orthogonal linear polarizations.
- Characterization as a function of drive current and pulse widths (3 ns, 10 ns, 30 ns).
- Analysis of joint probability distributions for detected photoelectrons.
Main Results:
- Joint photoelectron distributions reveal complex polarization correlations.
- Correlation is not fully described by a single correlation coefficient.
- The number of lasing modes is a key parameter for polarization correlation.
Conclusions:
- Pulsed multitransverse-mode VCSEL polarization correlations are intricate.
- The degree of polarization correlation is strongly dependent on the number of lasing modes.
- Further research needed to fully model complex correlations in VCSELs.
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