A new light at the end of the tunnel: fiber gas discharge lasers
arxiv(2023)
摘要
Optical fibers have emerged as a transformative platform for building better
and more robust solid state lasers. However, the wavelengths available to these
lasers are limited. Using hollow core optical fibers allows us to add gases as
new potential gain media for fiber lasers, and also liberates the gas laser
from the limits normally imposed by diffraction. To demonstrate the new
technology, we present a fiber laser at 3500 nm wavelength, using an
antiresonant guiding hollow core optical fiber containing neutral xenon atoms
pumped by an afterglow discharge of a helium-xenon mixture within a fiber of
over 1 m in length. Laser action is confirmed through observation of
polarization dependence, mode pulling and mode beating. Our results unlock a
new breed of flexible fiber lasers operating at a plethora of wavelengths, many
previous unavailable.
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