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This article is cited in 6 scientific papers (total in 6 papers)
Special issue devoted to fibre lasers
Possibilities of laser amplification and measurement of the field structure of ultrashort pulses in the range of 2.7–3 μm in tellurite glass fibres doped with erbium ions
E. A. Anashkinaabc, V. V. Dorofeevcd, S. V. Murav'evab, S. E. Motorincd, A. V. Andrianova, A. A. Sorokinab, M. Yu. Kopteva, S. Singhe, A. V. Kima a Institute of Applied Physics of the Russian Academy of Sciences, Nizhny Novgorod
b Lobachevski State University of Nizhni Novgorod
c Center for Laser Technology and Materials Science, Moscow
d Institute of Chemistry of High-Purity Substances RAS, Nizhnii Novgorod
e Sant Longowal Institute of Engineering & Technology, India
Abstract:
The amplification of ultrashort signals in the range 2.7–3 μm in active tellurite glass fibres with high Kerr nonlinearity and high concentration of erbium ions in the core is theoretically investigated under diode pumping at a wavelength of 0.975 μm. The possibility of producing pulses with the energy ~10 nJ and the duration smaller than 100 fs with ~20 dB gain is shown. Moreover, using a specially developed iterative computer algorithm, the possibility of determining the intensity and phase of the generated pulses by measuring their fundamental spectra and two additional spectra obtained by means of nonlinear-optical conversion in short pieces of these optical fibres is demonstrated. Optical fibre samples are made of high-purity TeO2 – ZnO – La2O3 – Na2O glasses with 1021 cm-3 concentration of erbium ions in the core and a low content of hydroxyl groups that causes small losses in the spectral range under consideration. The group velocity dispersions, effective mode fields, nonlinear coefficients and field overlap integrals of the LP01 fundamental modes with a doped core for optical fibres with different core diameters are calculated, and the emission and absorption cross sections are calculated basing on the experimental luminescence spectrum. The optimal parameters of the amplifier are determined by numerically modelling the dynamics of ultrashort pulses using the measured and calculated characteristics.
Keywords:
tellurite glass optical fibre, erbium ions, laser amplifier simulation, ultrashort pulse phase measurement.
Received: 09.10.2018 Revised: 14.10.2018
Citation:
E. A. Anashkina, V. V. Dorofeev, S. V. Murav'ev, S. E. Motorin, A. V. Andrianov, A. A. Sorokin, M. Yu. Koptev, S. Singh, A. V. Kim, “Possibilities of laser amplification and measurement of the field structure of ultrashort pulses in the range of 2.7–3 μm in tellurite glass fibres doped with erbium ions”, Kvantovaya Elektronika, 48:12 (2018), 1118–1127 [Quantum Electron., 48:12 (2018), 1118–1127]
Linking options:
https://www.mathnet.ru/eng/qe16944 https://www.mathnet.ru/eng/qe/v48/i12/p1118
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Abstract page: | 227 | Full-text PDF : | 30 | References: | 24 | First page: | 14 |
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