Triple Band Silica Based Double Pass EDFA with an Embedded DCF Module for CWDM Applications

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

“…An embedded dispersion compensating fiber was included and the experimental characterization is carried out in terms gain and noise figure over the CWDM wavelength grid. By providing optical gain to seven CWDM channels spectrally located between 1490 and 1610 nm, the amplifier can extend the reach of a 16-channel CWDM optical bus well beyond the 100 km limit [5][6][7]. However, there are other amplification options for the S-band.…”

Optimization of gain bandwidth and gain ripple of a hybrid Raman/parametric amplifier for access network applications

“…Several amplification technologies have been proposed and implemented, including SOAs, erbiumdoped fiber amplifiers (EDFAs) [16][17][18][19], Raman amplifiers [20], and hybrid combinations of these (hybrid SOA/Raman amplifiers and SOA/EDFAs) [13,21], and have already been used to build wideband optical amplifiers for CWDM transmission, as well as most recently for CWDM PON systems [5,6,13,21]. A hybrid SOA/Raman amplifier was shown capable of providing a 150 nm bidirectional gain (e.g., 75 nm in each direction) over the PON's downstream (1483-1557 nm) and upstream (1283-1357 nm) CWDM wavelength band with 18 and 19.5 dB gain, respectively [4].…”

An EDFA hybrid gain control technique for extended input power and dynamic gain ranges with suppressed transients

“…A brief list would certainly mention the development of new types of erbium doped fiber, including fibers with high erbium concentration, primarily for L band use [1], as well as depressed cladding fibers for S band applications [2]. Together with the availability of 980-nm pump lasers packaged in mini-DIL capsules, these advances allowed the proposal of circuit configurations for better gain and noise figure performances, embedded chromatic dispersion compensation and multi-band operation [3]. Automatic Gain Control (AGC), performed either by electronic or all-optical techniques, was another important feature recently added to EDFAs [4][5].…”