Wide-band optical fiber amplifier

Abstract

A wideband optical fiber amplifier is disclosed for amplifying and outputting wideband optical signals, including C-band optical signals and L-band optical signals that are input from an optical communication network. The wideband optical fiber amplifier includes: a first amplification section for amplifying the wideband optical signals; a second amplification section for amplifying the L-band optical signals which are separated from wideband optical signals amplified by the first amplification section; an optical signal coupler for combining the optical signals amplified by each of the first and second amplification sections to output the combined optical signals to the optical communication network; and an optical circulator. The optical circulator has a first port for causing the wideband optical signals from the optical communication network to be inputted, a second port for causing the inputted wideband optical signals to be output and for causing spontaneous emissions generated from the first amplification section to be input, a third port for causing the spontaneous emissions to be provided as pumping lights to the second amplification section and for causing the L-band optical signals amplified by the second amplification section to be input and a fourth port for causing the L-band optical signals input into the third port to be output to the optical signal coupler.

Description

technical field [0001] The invention relates to a broadband optical fiber amplifier. More specifically, the present invention relates to a broadband optical fiber amplifier for amplifying an optical signal transmitted from an optical communication network under predetermined conditions so as to compensate for loss of the optical signal or reduction in optical power. Background technique [0002] Traditional optical fiber amplifiers used in optical communication systems are devices used to amplify various transmitted optical signals. Optical fiber amplifiers amplify optical signals without photoelectric conversion. This facilitates a simple and economical construction. The fiber amplifier includes: an optical fiber doped with at least one rare earth element, a pump diode for generating pump light, and a wavelength selective coupler for providing the combined signal of the transmitted optical signal and the pump light to the doped fiber , and optical isolators. [0003] Va...

AI Technical Summary

Problems solved by technology

[0017] However, as mentioned above, since the traditional broadband optical fiber amplifier uses another optical signal coupler, the broadband optical signal input from the optical communication network is first separated into a C-band optical signal and an L-band optical signal, and then the separated Each of the optical signals of the two bands is amplified, so this amplifier has serious problems

For example, increased noise figure and insertion loss

In addition, since the number of components to be manufactured increases, the manufacturing cost increases

Images