It uses a very long low doping level fiber.
Er yb fiber amplifier.
A single stage forward pumped 980 nm doped fiber amplifier for l band.
Since the absorption cross section of yb at 1018 nm was far smaller than that at 9 nm region a longer er yb co doped fiber was required.
In this letter we propose and realize a novel concept for a high peak power highly efficient fiber amplifier in the 1 55 µm spectral range.
Highly er yb co doped phosphosilicate fibers with low optical losses were fabricated by the mcvd method utilizing an all gas phase deposition technique developed in house important characteristics such as photodarkening and photosensitivity of these fibers were thoroughly investigated.
The core of a silica fiber is doped with trivalent erbium ions er 3 and can be efficiently pumped with a laser at or near wavelengths of 980 nm and 1480 nm and.
Demonstrates an yb sensitized er doped fiber tunable mopa source.
Coractive s er yb co doped fibers are particularly attractive due to their highly efficient energy transfer that makes them one of the most efficient er yb doped.
The pump light is guided within an all silica structure using a fluorinated secondary cladding to create the pump guide boundary without the need for low index.
Considering both the signal power and amplification efficiency there is an optimal gain fiber length for amplifier.
Unlike other cladding pump or dual clad fibers fibercore s dual clad erbium ytterbium doped fiber f cp1500y was originally designed as a high power communications amplifier fiber.
Using this approach we demonstrate the amplification of single frequency 160 ns pulses at 1554 nm to a peak power of.
Double cladding yb eydf source mopa er.
Er yb fibers ytterbium sensitized erbium co doped fibers are used for operation around 1 5 micron in such applications as eye safe fiber lasers or high power edfa amplifiers.
In er and yb co doped systems yb absorbs most of the pump energy and quickly transfers it to neighboring er and the larger phonon energy in the phosphate glass matrix increases the chance of transition from 4 i 11 2 4 i 13 2 which prevents reverse transfer of energy from er to yb.
Optical fiber communication conference and exhibition ofc march 2020 20db gain in c band with only 5 3w of pump is achieved with an all fiberized 12 core er yb doped fiber amplifier.
Yb sensitized er doped fiber tunable mopa source.
This result is a first step towards sdm transmission including power efficient amplifiers and roadm.
Er yb codoped phosphate glasses with improved gain characteristics for an efficient 1 55 µm broadband optical amplifiers.
An almost negligible impact of photodarkening induced losses no more than 1 db m was discovered in.
The ase from the input part of the fiber is used.
