Abstract
The distortion and noise of a praseodymium-doped fluoride fiber amplifier (PDFA) are measured in two 40-channel AM-SCM video transmission systems. While it is already known that with direct modulation a PDFA leads to increased composite second-order distortion (CSO) and cross-modulation distortion (XM), this letter introduces an external modulation scheme that completely eliminates both problems. One PDFA is examined and found to yield low distortion and high CNR, but this is offset by a low-frequency noise. This noise is significant and the resulting picture quality is “Annoying” in subjective tests.
| Original language | English |
|---|---|
| Pages (from-to) | 440-442 |
| Number of pages | 3 |
| Journal | IEEE Photonics Technology Letters |
| Volume | 6 |
| Issue number | 3 |
| DOIs | |
| State | Published - 1994/03 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering