Mid-IR pulse amplification to∼ millijoule energies in a single transverse mode using large core Er: ZBLAN fibers operating at 2.8 µm
Optics Express, 2022•opg.optica.org
We demonstrate single transverse mode and high energy nanosecond pulse amplification
at∼ 2.8-µm using large core Er: ZBLAN fibers. The highest energies achieved are 0.75 mJ
from a 50 µm core, and 420µJ from a 30 µm core fibers respectively, seeded with 95 ns long
pulses generated by a ring-cavity Q-switched Er: ZBLAN fiber laser. Nearly diffraction-limited
beams with M^ 2= 1.2-1.3 were obtained using a single-mode excitation technique of multi-
mode core fibers. Achieved pulse energies exceed by approximately an order of magnitude …
at∼ 2.8-µm using large core Er: ZBLAN fibers. The highest energies achieved are 0.75 mJ
from a 50 µm core, and 420µJ from a 30 µm core fibers respectively, seeded with 95 ns long
pulses generated by a ring-cavity Q-switched Er: ZBLAN fiber laser. Nearly diffraction-limited
beams with M^ 2= 1.2-1.3 were obtained using a single-mode excitation technique of multi-
mode core fibers. Achieved pulse energies exceed by approximately an order of magnitude …
We demonstrate single transverse mode and high energy nanosecond pulse amplification at ∼2.8-µm using large core Er:ZBLAN fibers. The highest energies achieved are 0.75mJ from a 50 µm core, and 420µJ from a 30 µm core fibers respectively, seeded with 95 ns long pulses generated by a ring-cavity Q-switched Er:ZBLAN fiber laser. Nearly diffraction-limited beams with M^2 = 1.2-1.3 were obtained using a single-mode excitation technique of multi-mode core fibers. Achieved pulse energies exceed by approximately an order of magnitude the previously reported highest pulse energies in a single transverse mode from a fiber laser or amplifier at these mid-IR wavelengths.
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