H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 10/17 (2006.01) H01S 3/067 (2006.01) H04B 10/18 (2006.01) H01S 3/083 (2006.01) H01S 3/094 (2006.01) H01S 3/23 (2006.01)
Patent
CA 2302097
In order to reduce amplified spontaneous emission noise in the output signal of an amplifier of the kind in which amplification introduces amplified spontaneous emission, for example an erbium-doped fiber amplifier, the amplified signal is filtered using a loop mirror filter. The loop mirror filter may comprise a 3-dB fiber coupler with a loop of regular single-mode fiber connected between two of its ports. The amplified signal and the filtered signal will be applied to, and extracted from, one of its other ports, conveniently by way of a circulator.
Adams Patent & Trademark Agency
Atieh Ahmad K.
Oprel Technologies Inc.
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