US 6,333,810 B1 · Two-stage erbium doped fiber amplifier using remnant pumping light

Abstract

A two-stage erbium doped fiber amplifier (EDFA) using remnant pumping light is provided. The two-stage erbium doped fiber amplifier (EDFA) using remnant pumping light includes a first erbium doped fiber amplifying unit for multiplexing remnant pumping light received from a rear-stage and received optical signal, wherein the input optical signal is amplified by the remnant pumping light and a second erbium doped fiber amplifying unit which receives pumping light generated by a pumping source and optical signal output from the first erbium doped fiber amplifying unit, multiplexes the same, amplifies the optical signal output from the first erbium doped fiber amplifying unit, and outputs the remnant pumping light to the first erbium doped fiber amplifying unit.

Claims19

Dependent claims

A two-stage erbium doped fiber amplifier using remnant pumping light, comprising:

a first erbium doped fiber amplifier for generating a first amplified optical signal by amplifying a received optical signal in response to a first pumping light;
and
a second erbium doped fiber amplifier for generating a second amplifying optical signal and said first pumping light, said second amplified optical signal being generated by amplifying said amplified optical signal in response to a second pumping light, said first pumping light being generated by separating remnant pumping light from said second amplified optical signal, said remnant pumping light being fed back to said first erbium doped fiber amplifier as said first pimping light, said first erbium doped fiber amplifier being amplified by only said first pumping light fed back from said second erbium fiber amplifier.

Dependencies are inferred from the claim text.

Two-stage erbium doped fiber amplifier using remnant pumping light

Life of this patent

Two-stage erbium doped fiber amplifier using remnant pumping light

Life of this patent

Abstract

Claims19