We demonstrate significant gain over 1470–1540 nm in a thulium doped silica fiber amplifier. The fiber is compatible with standard fabrication techniques, and can be fusion spliced to standard telecommunications fibers.

Optical Fiber Communication ConferenceJan 1, 200117 citations

Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)

Resonantly pumped amplification in a thulium-doped photonic crystal fiber

Alex M. Sincore, Lawrence Shah, Mateusz Wysmolek, Robert T. Ryan, Ali Q. Abdulfattah, Martin C. Richardson

Published Aug 1, 2015• 0 citations

Publisher

Abstract

Efficiencies64%.

DOI: 10.1109/cleopr.2015.7376374

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\\sp3F\\sb4

energy level of thulium ion is also shown with the help of the model. It has been shown that about 5-15%o of the population is trapped at the

\\sp3F\\sb4

energy level. We have also shown theoretically, the expected gain and noise performance of Thulium doped fluoride fiber amplifiers pumped in the 680nm absorption band. The maximum gain at 806nm is slightly lower than with comparable 780 nm pumping. The gain bandwidth is however found to increase with 680nm pumping. The higher ASE at shorter wavelengths ($<$806nm) reduces the gain at the peak wavelength (806nm). This is a result of the better inversion with three level pumping at 680nm as compared to two level resonant pumping at 780nm. We report an efficient single mode erbium doped flouride fiber amplifier in the 850nm signal band for the first time. The amplification is through an up-conversion process. The erbium doped flouride fiber amplifier was pumped with an estimated pump power of 35mW at 792nm. We have also considered a theoretical model for a single mode erbium doped fluoride fiber amplifier. Efficient amplification occurs because of the strong excited state absorption at the pump wavelength from the

\\sp4I\\sb{13/2}

energy level.