Tm-doped fiber amplifiers for 1470-nm-band WDM signals

Advances in Rare Earth Spectroscopy and Applications

“…The Tm ion is a potential candidate for the S band because its transition 3 H 4 to 3 F 4 covers the spectral range 1440-1520 nm. Several single pumping schemes were suggested at 1047, 203 1050 204 and 1064 nm, 205 together with a dual-wavelength pumping at 800 + 1050 nm and 800 + 1410 nm. 206 Furthermore, codoping the OPAM with Tm and Yb ions allows excitation with a cheap diode laser (∼ 980 nm).…”

Fabrication and emission properties of Er3+/Yb3+ codoped tellurite glass fiber for broadband optical amplification

“…On the other hand, erbium doped fibers (EDF) have recently been the focus of intensive research in amplified spontaneous emission (ASE) sources as well as optical amplifiers [10][11][12]. In general, an incoherent broadband optical source with low spectral ripples and high power intensity in ASE spectrum is required.…”

“…Its effective bandwidth, however, could be narrower due to non-uniform nature of the ASE and external filters are often required for spectral uniformity. Certainly, broadband output spectrum of ASE ranging from C band to L band in silica fiber had been demonstrated in relatively complicated experimental setups which always were based on two stages or two-pump sources (LDs) [10][11][12][13]. The Er 3+ doped tellurite fiber (EDTF) has much better gain flatness and broader amplification range compared with a silica-based one [1][2][3][4].…”

Characterization of broadband amplified spontaneous emission of erbium-doped tellurite fiber with D-shape cladding

“…On the other hand, erbium-doped fibers (EDF) have recently been the focus of intensive research in ASE sources as well as optical amplifiers [7][8][9]. In general, an incoherent broadband optical source with low spectral ripples and high power intensity in ASE spectrum is required for better performance.…”