Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1997-01-17
1999-10-26
Bacares, Rafael
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359179, 359160, H04J 1402
Patent
active
059738081
ABSTRACT:
An optical fiber amplifier is free from optical oscillation, if operated for high output power level and can be manufactured at low cost. It comprises an input optical fiber 11 for receiving signal light, a first isolator 12 for blocking any return light of the optical signal entered into the input optical fiber 11, an erbium-doped optical fiber 13 for amplifying the entered optical signal, a pumping source 14, a wavelength division multiplexer 15 for coupling the signal light and the excited light from the pumping source 14, an optical signal output optical fiber 16 connected to the wavelength division multiplexer 15 to produce an amplified optical signal, a second isolator 17 arranged on the optical signal output optical fiber 16 and a excited light input optical fiber 19 for connecting the wavelength division multiplexer 15 and the pumping source 14 and the wavelength division multiplexer 15 has a dielectric multilayer filter 18 that reflects signal light and transmits excited light.
REFERENCES:
patent: 5500756 (1996-03-01), Tsushima et al.
patent: 5572357 (1996-11-01), Nakazato et al.
patent: 5701194 (1997-12-01), Meli et al.
Hayakawa Hirokazu
Sekimura Tokushi
Bacares Rafael
The Furukawa Electric Co. Ltd.
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