Abstract
Higher-order-mode (HOM) fibers guiding light in large-effective-area () Bessel-like modes have recently generated great interest for high-power laser applications. A polarization-maintaining (PM) version of HOM fibers can afford the added possibility of coherent beam combination, improved material processing, and polarization multiplexing of high-power fiber lasers. We report a PM-HOM fiber for guiding Bessel-like modes with ranging from . The fiber modes exhibit a birefringence value that compares well with that of a conventional single-mode PM fiber (), and exhibit a polarization extinction ratio ranging from 13–23 dB over meter-long fiber lengths, practical for amplifier systems. This fiber presents a unique platform for next-generation high-power fiber systems, as well as for the fundamental studies on deterministically polarized Bessel-like modes in fibers.
© 2017 Optical Society of America
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