S-band EDFA using standard erbium-doped fibre

ASE suppression in Er3+ doped dual-core triangular lattice photonic crystal fibers (PCFs) for narrowband and broadband dispersion compensation for communication wavelength

“…Due to strong confinement of the mode in the core region, a strong overlap between the optical field and the doped region (generally in the core) can be anticipated which consequently amplifies the input signal. However, after a certain wavelength ASE can be drastically reduced [21][22][23][24][25][26] and therefore it can be applicable for different applications like S band (1460 nm to 1530 nm) amplifier with ASE, after the required wavelength, drastically reduced. Thus, one can engineer the PCF geometrical parameters to design required performance in terms of gain and ASE suppression.…”

Efficient S-Band Amplification Using Depressed-Cladding Erbium-Doped Silica Fibers

“…However, an external filtering structure could be alternatively used if needed. Indeed, we have recently demonstrate a fairly simple amplifier configuration for S-band operation, employing a single filtering stage and conventional EDF fibers [9][10].…”

S-band gain-flattened EDFA with two-stage double-pass configuration

“…Although this S-band EDFA provides significant gain levels in the S-band, the specially designed EDF with depressed inner cladding have not been used widely. Moreover, the required suppressing wavelength is gotten by bending the fiber in the S-band EDFAs, and the cutoff efficiency could become worse as there is an imperceptible change in the radius of bend curvature [7] .…”

“…The C-band ASE is substantially attenuated by the suppressing filter at longer wavelength band so that the short wavelength band (S-band) can obtain a higher population inversion and sufficient amplification. Using a standard EDF S-band EDFA with a single-stage double-pass configuration has been proposed recently [7] , Proc. of SPIE Vol.…”