FIBER LIGHTGUIDE FOR AMPLIFYING OPTICAL RADIATION IN SPECTRAL AREA OF 1500-1800 NM, METHOD OF ITS MANUFACTURE AND BROADBAND FIBER AMPLIFIER Russian patent published in 2017 - IPC H01S3/17 G02B6/02 

FIELD: radio engineering, communication.

SUBSTANCE: fiber lightguide for amplifying optical radiation in the spectral range of 1500 - 1800 nm contains a core of oxide glass containing bismuth oxides in the amount of 10^-4-10^-2 moll. % and erbium in the amount of 10^-4-10^-1 moll. %, germanium and silicon oxides with the concentrations taken together or separately in the amount of 90-99.9 moll. %, oxides of phosphorus, boron and aluminium, taken together or separately, in the amount of 0.1-9.9 moll.%. Herewith the core of the fiber lightguide provides for the amplification of optical radiation in a band width of more than 200 nm in the spectral range of 1500-1800 nm, when pumping with one wavelength radiation in the range of 850-1000 nm and/or 1400-1500 nm, at least, one shell of quartz glass and protective coating.

EFFECT: amplification of optical radiation in the spectral range of 1500-1800 nm.

8 cl, 5 dwg, 1 tbl