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US 9,882,341 B2Granted
High power single mode fiber laser system for wavelengths operating in 2 μm range
AssigneeIpg Photonics Corporation
InventorsValentin Gapontsev, Fedor Shcherbina, Andrey Mashkin
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Abstract
A high power fiber laser system is configured with a pump cascade and a laser cascade. The pump cascade includes a fiber amplifier provided with a MM core which is doped with ions of rare-earth element including either Er or Yb/Er. The MM core of fiber amplifier is configured with a double bottleneck-shaped cross section. The laser cascade has a fiber laser configured with a core which is doped with Tm ions. The pump light generated by the amplifier is coupled into the upstream end of the Tm laser.
Claims12
A single mode (SM) high power fiber laser system comprising:
- a pump having at least one fiber amplifier radiating a multimode (MM) pump light and provided with an active fiber with a multimode core which is doped with ions of rare-earth elements selected from the group consisting of Er and ytterbium/erbium, and
- a fiber laser having a core doped with Tm ions, the Tm fiber laser receiving the MM pump light and radiating a system output at a wavelength of about 2 micron.
Dependencies are inferred from the claim text.