Abstract

We measure the polarization state of each guided transversal mode propagating in step-index large-mode-area fibers ($V\approx 4$) using a correlation-filter based measurement technique in combination with a Stokes parameter measurement. The entire emerging beam, expressed in terms of a phase-dependent superposition of linearly polarized modes, demonstrates spatially varying polarization properties. By knowing the information about modal amplitudes and phase differences, full information about the optical field is available.

© 2010 Optical Society of America

Near-diffraction-limited operation of step-index large-mode-area fiber lasers via gain filtering

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Fiber Bragg grating in large-mode-area fiber for high power fiber laser applications

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