title: Wideband thulium-holmium-doped fiber source with combined forward and backward amplified spontaneous emission at 1600-2300  nm spectral band.
abstract: We have experimentally demonstrated two extremely wideband amplified spontaneous emission (ASE) sources. High bandwidth is achieved by combining the backward and forward ASEs generated in thulium-holmium-doped fiber using appropriate wideband couplers. The ASE source optimized for flat spectral power density covers a spectral range from 1527 to 2171 nm at a -10  dB level. The ASE source optimized for spectroscopy features an enhancement with respect to single-mode fiber (SMF) coupled halogen lamps within the spectral range from 1540 nm to more than 2340 nm covering the 800 nm bandwidth.
authors: Pavel
authors: P
authors: Honzatko
authors: Yauhen
authors: Y
authors: Baravets
authors: Ivan
authors: I
authors: Kasik
authors: Ondrej
authors: O
authors: Podrazky
mesh_terms: D000669:Amplifiers, Electronic; D005336:Fiber Optic Technology / Q000379:methods; D006695:Holmium; D053844:Lasers, Solid-State; D055100:Optical Fibers; D055620:Optical Phenomena; D013932:Thulium
chemical_list: D013932:Thulium; D006695:Holmium