Moskovskiy fiziko-tehnicheskiy institut MFTI
UDC 621.373.8
UDC 535-92
CSCSTI 29.33
Russian Classification of Professions by Education 03.03.02
Russian Library and Bibliographic Classification 223
Russian Trade and Bibliographic Classification 6135
BISAC TEC019000 Lasers & Photonics
This work is devoted to the experimental study of the amplification process of groups of bound pulses (soliton molecules) in an all-fiber erbium-doped amplifier. The amplification of a 10-pulse regime (with a pulse duration of 509 femtoseconds and temporal separation between pulses of 2.64 picoseconds), generated by a ring fiber laser with passive mode locking based on nonlinear polarization evolution (NPE), up to an average power of 152 mW, is demonstrated. The amplification process did not disrupt the order of the bound state but resulted in significant spectral broadening, leading to the generation of a coherent supercontinuum. A comb-like spectrum in the range from 1400 nm to 1700 nm was obtained without altering key characteristics of the soliton molecules, such as the number of pulses (while increasing the pulse duration within the molecule to 1.13 ps) and without changing the temporal separation between the pulses. This work also demonstrates the potential of using an all-fiber laser with soliton molecule amplification as a source of pulsed radiation with high average power while maintaining low peak power due to the energy distribution across a group of pulses.
Fiber lasers, femtosecond lasers, soliton molecules, erbium-doped fiber lasers.
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