Emission and absorption cross section of thulium doped silica fibers

Abstract

A thorough investigation of the emission and absorption spectra of the ( 3 F 4 , 3 H 6 ) band in thulium doped silica fibers has been performed. All the basic parameters of thulium in silica have been extracted with the purpose of further analysis in laser and amplifier simulations. The experimental methods used to obtain the scaled cross sections have been carefully selected in order to avoid problems associated with calibrated measurements and knowledge of the radiative lifetime. The values of the absorption cross sections agree well with previously reported values, however the peak emission to peak absorption cross section ratios are found to be significantly below 1. Also confinement factors and thulium concentrations are estimated from the results. 948-956 (1999). 12. X. Zou and H. Toratani, "Spectroscopic properties and energy transfer in Tm 3+ singly-and Tm 3+ /Ho 3+ doublydoped glasses," J. Non-crystalline Solids 195, 113-124 (1996). 13. B. M. Walsh and N. P. Barnes, "Comparison of Tm:ZBLAN and Tm:silica fiber lasers;Spectroscopy and tunable pulsed laser operation around 1.9 μm," Appl. Phys. B 78, 325-333 (2004).

Isolator-free unidirectional thulium-doped fiber laser

“…The absorption and emission cross sections and the radiative lifetime of the 3 H 6 ? 3 F 4 Tm 31 transition are taken from the reference (fiber Tm1) 32 . To perform the simulations in a reasonable computational time, the doping concentration is set to 3 3 10 25 m 23 (compared with the 8.4 3 10 25 m 23 reported) 32 , which results in a reduced gain in TDF, and therefore leads to the difference between the experimentally measured and simulated laser output powers (26 dBm and 24 dBm at 2000 nm for a 2 W pump, respectively).…”

Narrow linewidth CW amplification of a Tm-doped double-clad fiber MOPA system

“…Related parameters of the simulation are listed in Table 1 [11][12][13][14][15]. Cross relaxation coefficients of the 25/400 m amplification fiber is calculated [16] Fig.…”

Emission decay and energy transfer in Yb/Tm Y-codoped fibers based on nano-modified glass

“…The typical lifetimes for the 3 F4 level of Tm 3+ vary from 200 to 650 μs, and for the 2 F5/2 level of Yb 3+ from 470 to 830 μs depending on the host composition [4,[8][9][10]. Despite the large importance of the ET processes, there are not so much data in the literature on the efficiency of the ET from Yb 3+ to Tm 3+ ions, which makes our work particularly relevant.…”