Patent ID: 8736953
Filing Date: 2014-05-27
Classification: G02B,H01S

Abstract:
1. A method comprising: amplifying an optical signal in an optical-gain-fiber subsystem, wherein the optical-gain-fiber subsystem includes an output end; outputting the amplified optical signal in a forward-propagating direction from the output end of the optical-gain-fiber subsystem as a high-brightness optical beam having a first Rayleigh range; receiving the amplified optical signal from the output end of the optical-gain-fiber subsystem into a first end of a delivery fiber having a non-circular waveguide core, wherein the delivery fiber is interfaced to the optical-gain-fiber subsystem; outputting the amplified optical signal from a second end of the delivery fiber wherein the delivery fiber includes a non-circular waveguide core; and without the use of a non-linear optical isolator, inhibiting light traveling in a backward-propagating direction in the delivery fiber from entering the optical-gain-fiber subsystem in the backward-propagating direction.