High-Energy 1.96–2.4 μ m Tunable Raman Soliton Generation in All-Silica-Fiber Tm-Doped Amplifier
IEEE Photonics Technology Letters(2023)
摘要
Femtosecond pulses in the 2-
$2.4\mu \text{m}$
spectral region have potential applications in many fields, such as two-photon fluorescence imaging, sensitive molecular spectroscopy, and nonlinear laser system. As the energy is proportional to the square of the soliton order, the high-energy soliton pulse can be achieved by promoting the soliton order during the soliton splitting and soliton self-frequency shifting processes. We demonstrated high-energy Raman solitons with wavelengths tunable from 1.96 to
$2.39\mu \text{m}$
in a thulium-doped silica fiber amplifier. The maximum pulse energy of the soliton was about 65.1-nJ with the corresponding wavelength of
$2.39\mu \text{m}$
, which, to our knowledge, was the farthest and the highest energy soliton pulse generated in commercial single-mode silica fiber.
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关键词
Optical fiber lasers,optical amplifiers,optical solitons,soliton self-frequency shifting,nonlinear optics
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