title: Exploiting the short wavelength gain of silica-based thulium-doped fiber amplifiers.
abstract: Short wavelength operation (1650-1800 nm) of silica-based thulium-doped fiber amplifiers (TDFAs) is investigated. We report the first demonstration of in-band diode-pumped silica-based TDFAs working in the 1700-1800 nm waveband. Up to 29 dB of small-signal gain is achieved in this spectral region, with an operation wavelength accessible by diode pumping as short as 1710 nm. Further gain extension toward shorter wavelengths is realized in a fiber laser pumped configuration. A silica-based TDFA working in the 1650-1700 nm range with up to 29 dB small-signal gain and noise figure as low as 6.5 dB is presented.
authors.forename: Z
authors.initials: Z
authors.lastname: Li
authors.forename: Y
authors.initials: Y
authors.lastname: Jung
authors.forename: J M O
authors.initials: JM
authors.lastname: Daniel
authors.forename: N
authors.initials: N
authors.lastname: Simakov
authors.forename: M
authors.initials: M
authors.lastname: Tokurakawa
authors.forename: P C
authors.initials: PC
authors.lastname: Shardlow
authors.forename: D
authors.initials: D
authors.lastname: Jain
authors.forename: J K
authors.initials: JK
authors.lastname: Sahu
authors.forename: A M
authors.initials: AM
authors.lastname: Heidt
authors.forename: W A
authors.initials: WA
authors.lastname: Clarkson
authors.forename: S U
authors.initials: SU
authors.lastname: Alam
authors.forename: D J
authors.initials: DJ
authors.lastname: Richardson