Accession Number : ADP006986

Title :   Gain Characteristics of Lanthanum Co-Doped Erbium Fiber Amplifier,

Corporate Author : NIPPON TELEGRAPH AND TELEPHONE CORP TAKE TRANSMISSION SYSTEMS LABS

Personal Author(s) : Kimura, Yasuo ; Nakazawa, Masataka

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : Recent progress on erbium-doped fiber amplifiers (EDFAs) and their application to optical communications has been very rapid since the EDFA has many advantages such as polarisation-insensitive high gain, a low noise-figure, and low insertion loss.1 It is well known that in order to obtain a broader and relatively flatter gain profile, Aluminum (AI203) is co-doped into the core of the fibers.2,3 To make a wavelength independent flat gain profile is very important from the viewpoint of ultrashort pulse amplification and wavelength division multiplexing technique. Payne and Laming investigated a Borolanthanate co-doped EDFA.4 Although LaF3 or La2O3 were used as hosts for Nd ions5-7, detailed gain characteristics of a Lanthanum co-doped Er/SiO2 fiber amplifier have not yet been clarified. In this paper, we describe for the first time the detailed gain characteristics of a Lanthanum (La) co-doped EDFA and compare then with those of Al codoped and non co-doped EDFAs.

Descriptors :   *AMPLIFIERS, AMPLIFICATION, CORES, DIVISION, ERBIUM, FIBERS, GAIN, HIGH GAIN, LANTHANUM, MULTIPLEXING, OPTICAL COMMUNICATIONS, PROFILES, PULSES, DIODES.

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

Distribution Statement : APPROVED FOR PUBLIC RELEASE