Fiber amplifier
AssigneeAtla Lasers AS
InventorsVladislav Vladimirovich Dvoyrin, Irina T. Sorokina
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Abstract
The present application provides an optical system. The optical system includes a fiber amplifier with an optically active doped fiber, a source of seed pulses, and a pump source. The doped fiber is doped with one or more active element(s) selected such that the seed pulses are amplified in intensity. The doped fiber has a negative (anomalous) group velocity dispersion in the region from the wavelength of the seed pulses to a threshold wavelength at which the magnitude of the optical loss of the doped fiber is greater than a gain due to stimulated Raman scattering.
Claims27
An optical system, comprising:
- a fiber amplifier comprising an optically active doped fiber;
- a source of seed pulses;
- and a pump source, wherein the doped fiber is doped with one or more active element(s) selected such that the seed pulses are amplified in intensity;
- the doped fiber has a negative (anomalous) group velocity dispersion in the region from the wavelength of the seed pulses to a threshold wavelength at which the magnitude of the optical loss of the doped fiber is greater than a gain due to stimulated Raman scattering;
- wherein the optical system is operable in a first and second mode, wherein in the first mode the optical system is operable to generate as its output a high-energy pulse shorter than the seed pulse and comprising the predominant part of the output amplifier radiation without spectral filtering and spectrally shifted to the longer wavelength direction, and wherein in the second mode the optical system is operable to generate as its output an optical supercontinuum.
An optical system, comprising:
- a thulium doped fiber amplifier with a negative group velocity dispersion in the region of 1.8 to 2.6 μm;
- a pump source arranged to pump at a wavelength from 0.77 to 0.82 μm;
- a source of seed pulses, the seed pulses having wavelengths from 1.8-2.1 μm;
- and wherein the optical system is operable in a first mode to generate a soliton pulse in the 2.2-2.8 μm region comprising the predominant part of the amplifier output radiation and in a second mode to generate supercontinuum radiation from 1.8-2.6 μm, wherein it is possible to change from one operational mode to another by changing the input parameters of the pump source and seed pulses.
A method of operating an optical system, comprising:
- providing a thulium-doped fiber amplifier, the thulium-doped fiber amplifier having a negative group velocity dispersion in the region of 1.8 to 2.6 μm;
- seeding the thulium-doped fiber amplifier with seed pulses having the wavelengths from 1.8-2.1 μm;
- pumping the thulium-doped fiber amplifier at any wavelengths from 0.77-0.82 μm;
- and generating a series of spectrally separated soliton pulses in the spectral region from the seed pulse wavelength to 2.6 μm in a first mode of operation, and in a second mode of operation, generating supercontinuum radiation covering the region of 1.8-2.6 μm.
Dependencies are inferred from the claim text.