Accession Number : ADP006997

Title :   Multichannel Amplification Characteristics of Saturated Erbium-Doped Fiber Amplifiers,

Corporate Author : FURUKAWA ELECTRIC CO LTD CHIBA (JAPAN)

Personal Author(s) : Cheng, Y. H. ; Kagi, N. ; Oyobe, A. ; Nakamura, K.

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : Erbium-doped fiber amplifiers (EDFAs) are attractive for various optical fiber transmission systems and networks owing to their several advantages such as high gain and low noise. A EDFA with its high output saturation power and wide gain profile is specially suitable for wavelength-division multiplexing (WDM) applications such as multichannel CATV distribution systems 1. In these applications, the EDFA is normally used as a post (or a booster) amplifier and operates at a saturated region. Although it has been demonstrated that the EDFA is immune to patterning effects and interchannel interference, and has low gain saturation induced crosstalk 2, 3, there is little information about effects of wavelength spacing and fiber length in a saturated EDFA for multichannel applications. In this paper, we report the experimental results on wavelength and fiber length dependence of gain for saturated EDFAs in a two-channel amplification system. The experimental results show that when an EDFA operates at the saturated region in a multichannel system, a shorter fiber length than that in single-channel should be selected to get a flat gain profile, and that the Ge/Al/Er-doped silica fiber is desirable for multichannel amplification use since a gain hole-burning is observed for the Ge/Er-doped silica fiber.

Descriptors :   *AMPLIFIERS, AMPLIFICATION, CHANNELS, COMBUSTION, CROSSTALK, DISTRIBUTION, DIVISION, ERBIUM, FIBERS, GAIN, HIGH GAIN, INTERFERENCE, LENGTH, LOW NOISE, MULTICHANNEL, NETWORKS, OUTPUT, POWER, PROFILES, REGIONS, SATURATION, DIODES, OPTICAL EQUIPMENT.

Subject Categories : Electrical and Electronic Equipment
      Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE