Distortion and noise properties of a praseodymium-doped fluoride fiber amplifier in 1.3 /spl mu/m AM-SCM video transmission systems

Author

Kikushima, Koji ; Yamada, Makoto ; Shimizu, Makoto ; Temmyo, Jiro

Author_Institution

NTT Transmission Syst. Labs., Kanagawa, Japan

Volume

6

Issue

3

fYear

1994

fDate

3/1/1994 12:00:00 AM

Firstpage

440

Lastpage

442

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.<>

Keywords

amplitude modulation; fibre lasers; optical communication equipment; optical modulation; praseodymium; subcarrier multiplexing; television networks; 1.3 /spl mu/m AM-SCM video transmission systems; 40-channel AM-SCM video transmission systems; IR; PDFA; Pr-doped fluoride fiber amplifier; composite second-order distortion; cross-modulation distortion; direct modulation; external modulation scheme; fibre laser distortion; high CNR; low distortion; low-frequency noise; noise properties; picture quality; praseodymium-doped fluoride fiber amplifier; Chirp modulation; Degradation; Distortion measurement; Frequency; Laboratories; Low-frequency noise; Optical distortion; Optical fiber amplifiers; Optical fiber polarization; Optical modulation;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.275512

Filename

275512