title: 1120 nm diode-pumped Bi-doped fiber amplifier.
abstract: Bismuth-doped aluminosilicate fiber has been fabricated by the MCVD-solution doping method and characterized for its unsaturable loss and gain. The amplifier performance has been compared for a novel pumping wavelength of 1120 nm with the conventional pumping wavelength region of 1047 nm. Unsaturable loss was 65% and 35% at 1047 and 1120 nm, pump wavelengths, respectively. A maximum gain of about 8 dB at 1180 nm for a fiber length of 100 m was observed with 1120 nm pumping. Gain enhancement of 70% was achieved with the 1120 nm pump as compared to the 1047 nm pump. A further 3.5 dB gain was obtained on simultaneous pumping at 1047 and 1120 nm.
authors.forename: N K
authors.initials: NK
authors.lastname: Thipparapu
authors.forename: S
authors.initials: S
authors.lastname: Jain
authors.forename: A A
authors.initials: AA
authors.lastname: Umnikov
authors.forename: P
authors.initials: P
authors.lastname: Barua
authors.forename: J K
authors.initials: JK
authors.lastname: Sahu