title: Solid-core photonic bandgap fibers for cladding-pumped Raman amplification.
abstract: Cladding-pumped solid-core photonic bandgap Raman fiber amplifiers are analyzed theoretically as possible candidates for power scaling. An example fiber design with a mode field diameter of 46 µm and a cladding diameter of 250 µm is calculated to exhibit 0.12 dB/km of confinement loss at the first Stokes wavelength and >10 dB/m at the second Stokes wavelength for a pump wavelength of 1.567 µm while maintaining low loss and large mode area in realistic coiling configurations. A Raman amplifier based on this fiber with 85 kW of output power, 78% optical conversion efficiency, a maximum heat load of 130 W/m, and a length of 235 m is simulated.
authors.affiliation: Air Command and Staff College, Air University, Maxwell Air Force Base, Alabama 36112, USA. benjamin.ward.1@us.af.mil
authors.forename: Benjamin
authors.initials: B
authors.lastname: Ward