Fiber laser with double-passed pump architecture
AssigneeNorthrop Grumman Systems Corporation
InventorGregory Goodno
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Abstract
A fiber laser amplifier system including a first dual-clad delivery fiber receiving a signal beam and a pump beam, a doped amplifying fiber coupled to the first delivery fiber and receiving the signal beam and the pump beam, and amplifying the signal beam using the pump beam, and a second dual-clad delivery fiber coupled to the amplifying fiber and receiving the amplified signal beam and the pump beam. The system also includes an endcap having an input facet and an output facet. The input facet is coupled to the second delivery fiber and receives the amplified signal beam and the pump beam, and the output facet is configured to pass the amplified signal beam and reflect the pump beam back onto the second delivery fiber to be directed back to the doped amplifying fiber.
Claims20
A fiber laser amplifier system comprising:
- at least one signal beam source generating a signal beam;
- at least one pump beam source generating a pump beam;
- a beam combiner for combining the signal beam and the pump beam;
- a first dual-clad delivery fiber coupled to the beam combiner and receiving the combined pump beam and signal beam;
- a doped amplifying fiber coupled to the first delivery fiber and receiving the combined pump beam and signal beam, said amplifying fiber amplifying the signal beam using the pump beam;
- a second dual-clad delivery fiber coupled to the amplifying fiber and receiving the amplified signal beam and the pump beam;
- and
- an endcap including an input facet and an output facet, said input facet being coupled to the second delivery fiber and receiving the amplified signal beam and the pump beam, said output facet being configured to pass the amplified signal beam and reflect the pump beam back onto the second delivery fiber to be directed back to the doped amplifying fiber.
A fiber laser amplifier system comprising:
- at least one signal beam source generating a signal beam;
- at least one pump beam source generating a pump beam;
- a beam combiner for combining the signal beam and the pump beam;
- a first dual-clad delivery fiber coupled to the beam combiner and receiving the combined pump beam and signal beam;
- a doped amplifying fiber coupled to the first delivery fiber and receiving the combined pump beam and signal beam, said amplifying fiber amplifying the signal beam using the pump beam;
- a second dual-clad delivery fiber coupled to the amplifying fiber and receiving the amplified signal beam and the pump beam;
- a coreless fiber coupled to the second delivery fiber and receiving the amplified signal beam and the pump beam;
- and
- an endcap including an input facet and an output facet, said input facet being coupled to the coreless fiber and receiving the amplified signal beam and the pump beam, said output facet being spherically curved and including a dichroic coating so as to pass the amplified signal beam and reflect the pump beam back onto the coreless fiber to be directed back to the second delivery fiber and the doped amplifying fiber, wherein the reflected pump beam is re-imaged onto a cladding layer of the coreless fiber and any signal light that is reflected from the output facet is re-imaged in the endcap.
An optical endcap including an input facet and an output facet, said input facet being coupled to a dual-clad delivery fiber and receiving an amplified signal beam and a pump beam, said output facet being configured to pass the amplified signal beam and reflect the pump beam back onto the delivery fiber to be directed back to a doped amplifying fiber.
Dependencies are inferred from the claim text.