| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1493405 | Optical Materials | 2016 | 7 Pages |
•Er/Yb co-doped/Raman hybrid amplifier was purposed at different values of input pump powers.•The gain and noise figure of Er/Yb co-doped is improved due to hybrid with Raman amplifier.•The most applications of such hybrid are high transmission capacity DWDM.•The higher values of bandwidth are obtained due to hybrid Raman which is more important in DWDM.
An Er/Yb co-doped fiber/Raman hybrid amplifier (HA) is proposed and studied theoretically and analytically to improve the gain and noise figure of optical amplifiers. The calculations are performed under a uniform dopant and steady-state conditions. The initial energy transfer efficiency for Er/Yb co-doped fiber amplifier (EYDFA) is introduced, while the amplified spontaneous emission (ASE) is neglected. The glass fiber used for both Er/Yb and Raman amplifiers is phosphate. Different pump powers are used for both EYDFA and RA with 1 μW input signal power, 1 m length of Er/Yb amplifier and 25 km length of Raman amplifier (RA). The proposed model is validated for Er/Yb co-doped amplifier and Raman amplifier separately by comparing the calculating results with the experimental data. A high gain and low noise figure at 200 mW Raman pump power and 500 mW Er/Yb pump power are obtained for the proposed HA as compared with the experimental results of EYDFA, Raman amplifier and the EDFA/Raman hybrid amplifier.
