Abstract

A mechanism for self-compression of laser pulses in a multicore fiber on the basis of nonlinear combining of radiation from many cores, surrounding the central core in a ring and its trapping into the central core in a chirp-free and pedestal-free soliton-like pulse, is proposed. It is shown that the compression ratio is weakly dependent on the energy and the number of cores in the fiber and approximately equal to 6 with an almost 100% energy efficiency. The compression ratio can be increased to 40 with an efficiency of more than 50% by using additional compression of longer pulses with approximately the same energy. The possibility of a 38-fold compression of a laser pulse to a duration of 15 fs with a pulse energy of 4 nJ in the fiber with realistic parameters was demonstrated numerically.

© 2019 Optical Society of America

High-energy femtosecond pulse shaping, compression, and contrast enhancement using multicore fiber

A. V. Andrianov, N. A. Kalinin, M. Yu. Koptev, O. N. Egorova, A. V. Kim, and A. G. Litvak
Opt. Lett. 44(2) 303-306 (2019)

Simple technique for the compression of nanojoule pulses from few-cycle laser oscillator to 1.7-cycle duration via nonlinear spectral broadening in diamond

M. Zukerstein, M. Kozák, F. Trojánek, and P. Malý
Opt. Lett. 43(15) 3654-3657 (2018)

Ultra-broadband frequency shifting of laser pulses in a square multicore chalcogenide fiber

Alexey Balakin, Sergey Skobelev, Alexey Andrianov, Elena Anashkina, and A. G. Litvak
Opt. Lett. 49(6) 1500-1503 (2024)

Coherent propagation and amplification of intense laser pulses in hexagonal multicore fibers

A. A. Balakin, S. A. Skobelev, A. V. Andrianov, E. A. Anashkina, and A. G. Litvak
Opt. Lett. 45(12) 3224-3227 (2020)

Self-compression in a solid fiber to 24  MW peak power with few-cycle pulses at 2  μm wavelength

C. Gaida, M. Gebhardt, F. Stutzki, C. Jauregui, J. Limpert, and A. Tünnermann
Opt. Lett. 40(22) 5160-5163 (2015)