Abstract
Characteristics of diode-pumped Er-doped and Er-Pr-codoped ZBLAN fiber amplifiers were investigated at the 2.7-2.8 μm wavelength range. An amplified signal of 4.6 W was obtained from the singly Er-doped amplifier for an input signal of 110 mW, corresponding to a net gain of 16.2 dB. An amplified signal of 2.65 W was obtained from the Er-Pr-codoped amplifier for an input signal of 70 mW, corresponding to a net gain of 15.8 dB. It is found that the gain bandwidth of the singly Er-doped amplifier is much narrower than that of the Er-Pr-codoped amplifier. Small gain, no gain, or even a loss for shorter-wavelength signals propagating through the singly Er-doped amplifier should attribute for the large number residual populations in the lower laser level caused by the inefficient depopulation of the energy transfer upconversion processes.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1578-1580 |
| Number of pages | 3 |
| Journal | Optics letters |
| Volume | 33 |
| Issue number | 14 |
| DOIs | |
| State | Published - Jul 15 2008 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics