Broadband and gain-flattened amplifier composedof a 1.55 µm-band and a 1.58 µm-band Er ³⁺ -doped fibre amplifierin a parallel configuration

Broadband and Gain-Flattened Optical Fiber Amplifiers

“…It seems, however, that the pumping efficiency of such amplification is considerably lower than those of the standard EDFAs operating around 1550 nm. Ultra-broadband EDFAs employing this 1580 nm-band EDFA and the standard 1550 nm-band EDFA in a parallel configuration have been demonstrated [15,16].…”

Growth and luminescence properties of a novel crystal with large birefringence: ErBa3B9O18

“…Due to its complex energy-level scheme, two laser emissions at 2.94 mm ( 4 I 11/2 -4 I 13/2 ) and 1.54 mm ( 4 I 13/2 -4 I 15/2 ) are found, which have potential applications in medicine, optical communications and infrared distance measurements [3][4][5][6]. The spectroscopic properties and laser actions of Er 3+ -doped crystals have attracted much attention recently [7,8].…”

Influence of B2O3 to the inhomogeneous broadening and spectroscopic properties of Er3+/Yb3+ codoped fluorophosphate glasses

“…Although several reports have been published on complicated methods of broadening and flattening the gain spectra of silica-based EDFA [3][4][5], host material is still an effective way to solve this problem. Glasses with large inhomogeneous broadening and better broadband and flatness properties are promising candidates for Er 3+ -doped lasers and amplifiers [6].…”