Related Experiment Video
Updated: May 3, 2026
14:18
Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
Published on: February 28, 2016
11.0K
Linearly polarized emission from random lasers with anisotropically amplifying media
Optics Express
|February 12, 2014
Summary
Simulations show random laser polarization depends on scattering strength and pump anisotropy. Strong scattering randomizes polarization, contradicting experimental observations under weak scattering.
Area of Science:
- Photonics and Laser Physics
- Computational Physics
Background:
- Random lasers exhibit unique emission properties due to disordered gain media.
- Understanding emission polarization is crucial for random laser applications.
Purpose of the Study:
- Investigate frequency-dependent emission polarization in 3D random lasers.
- Characterize the impact of anisotropic pumping on polarization states.
- Explore the role of scattering strength in determining polarization behavior.
Main Methods:
- Finite-difference time-domain (FDTD) integration of Maxwell's equations.
- Coupling FDTD with rate equations for optical gain.
- Simulating three-dimensional random laser systems.
Main Results:
- Under weak scattering, isotropic pumping yields random polarization, while anisotropic pumping results in linear polarization.
- A crossover to strong scattering randomizes mode polarization, irrespective of pump anisotropy.
- Simulated polarization behaviors align with recent experimental findings.
Conclusions:
- Scattering strength significantly influences random laser polarization.
- Anisotropic pumping can control polarization under weak scattering conditions.
- Strong scattering effects can override pump-induced polarization anisotropy.
