A High Power and Low Noise Transmitter AM-VSB Transmission Using Erbium-Doped Fiber Post Amplifier,
Abstract
Erbium doped fiber amplifiers(EDFAs) with high output power and no distortion degradation are very useful for the amplitude-modulated vestigial-sideband(AM-VSB) transmission systems which require a relatively high received power for a preferred carrier to noise ratio(CNR) and a low distortion (1) (2). A field trial was conducted and feasibility of multi-distribution for trunk lines was confirmed(3). We have developed an erbium doped fiber with a high conversion efficiency of 86 % and a small wavelength dependence. In this paper, by using this fiber as a post amplifier, we present a high power and low noise transmitter with monitoring functions for practical use. We also show the effectiveness of long-wavelength-pass filters which have a low insertion loss and no need for wavelength tuning unlike band-pass filters.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 22, 1992
- Accession Number
- ADP007021
Entities
People
- Kazuo Iizuka
- Masayuki Nishimura
- Masayuki Shigematsu
- Toshio Okita
Organizations
- Sumitomo Electric Industries