Tm3+ cladding-doped fiber for selective wavelength filtering in high-power pump lasers.
Scattering and reflection of transmission band power in a fiber amplifier cause increased bit-error rates through multiple path interference (MPI). We report a passive method for reducing MPI contributions from the front facet of a 980-nm fiber-Bragg-grating-stabilized pump laser by use of a Tm3+-doped fiber pigtail between the diode facet and the fiber Bragg grating. Optical return loss in the C band is reduced to below -30 dB.
Davis
Monica K
MK
Corning, Inc., Corning, New York 14831, USA. monica.k.davis@stanfordalumni.org
Dejneka
Matthew J
MJ
Ainslie
Jim
J