A comparison of optimization techniques for power patterns with low sidelobes generated by linear arrays with efficient excitation distributions
✍ Scribed by S. Kyle Smith; Julio C. Brégains; Kathleen L. Melde; Francisco Ares
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- English
- Weight
- 102 KB
- Volume
- 45
- Category
- Article
- ISSN
- 0895-2477
No coin nor oath required. For personal study only.
✦ Synopsis
A reflective long-wavelength-band erbium-doped fiber amplifier (L-band EDFA) with enhanced gain and improved noise figure is demonstrated. By utilizing a short length of erbium-doped fiber (EDF) before an optical circulator (OC), the population inversion at the input of this EDFA is intensified, which gives rise to the noise-figure improvement. Compared with the conventional one, our novel reflective EDFA provides noise improvement of 2.2-23.9 dB and gain enhancement of 2.3-12.6 dB throughout an approximate wavelength region from 1568 to 1594 nm. We also observe the gain evolution under different amounts of prestage pump power and average gain and noise figures of 32.2 and 8.1 dB, respectively, are achieved with a prestage pump power of 69.5 mW.