Thin-rod active elements for amplification of femtosecond pulses

To study the possibility of amplifying the radiation of femtosecond fibre lasers in thin-rod active elements, amplifying modules based on thin rods made of broadband Yb : CaF2 and Yb : Y2O3 materials are developed. It is shown that the gain in Yb : YAG and Yb : Y2O3 elements is limited because only...

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Bibliographic Details
Published in:Quantum electronics (Woodbury, N.Y.) N.Y.), 2019-04, Vol.49 (4), p.350-353
Main Authors: Volkov, M.R., Kuznetsov, I.I., Mukhin, I.B., Palashov, O.V., Konyashchenko, A.V., Tenyakov, S.Yu, Liventsov, R.A.
Format: Article
Language:English
Subjects:
Amplification
Broadband
Calcium fluoride
CALCIUM FLUORIDES
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
CROSS SECTIONS
EMISSION
femtosecond laser pulses
Femtosecond pulses
Fiber lasers
MATERIALS
NEODYMIUM LASERS
OPTICAL FIBERS
PULSES
SIGNALS
SPECTRA
spectral narrowing
thin-rod active elements
Ytterbium
ytterbium-doped laser materials
Yttrium oxide
YTTRIUM OXIDES
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Summary:To study the possibility of amplifying the radiation of femtosecond fibre lasers in thin-rod active elements, amplifying modules based on thin rods made of broadband Yb : CaF2 and Yb : Y2O3 materials are developed. It is shown that the gain in Yb : YAG and Yb : Y2O3 elements is limited because only part of the broadband signal is amplified, while amplification in Yb : CaF2 elements occurs in a wider spectral range but is weak due to a small emission cross section. Amplification from submicrojuole to submillijoule level in the regenerative amplification regime is demonstrated. The new broadband Yb : CaF2 and Yb : Y2O3 materials can amplify radiation with a considerably broader spectrum than Yb : YAG.
ISSN:1063-7818
1468-4799
DOI:10.1070/QEL16964