Cancellation of Raman self-frequency shift for compression of optical pulses

• Published in: Optical and quantum electronics Vol. 49; no. 10; pp. 1 - 7
• Main Authors: Pickartz, Sabrina, Brée, Carsten, Bandelow, Uwe, Amiranashvili, Shalva
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.10.2017; Springer Nature B.V
• Subjects: 2017 Numerical Simulation of Optoelectronic Devices; Characterization and Evaluation of Materials; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COMPRESSION; Computer Communication Networks; Electrical Engineering; FIBERS; Frequency shift; Group velocity; Lasers; Longitudinal waves; MOMENTUM TRANSFER; NONLINEAR PROBLEMS; Optical Devices; Optical pulses; Optics; Photonics; Physics; Physics and Astronomy; PULSES; SCATTERING; SOLITONS; VELOCITY; 78-06; Optical event horizons; Ultrashort pulses; Soliton self-frequency shift; 78A60; Pulse compression; 78M22
• ISSN: 0306-8919; 1572-817X
• DOI: 10.1007/s11082-017-1164-7

We study to which extent a fiber soliton can be manipulated by a specially chosen continuous pump wave. A group velocity matched pump scatters at the soliton, which is compressed due to the energy/momentum transfer. As the pump scattering is very sensitive to the velocity matching condition, soliton compression is quickly destroyed by the soliton self-frequency shift (SSFS). This is especially true for ultrashort pulses: SSFS inevitably impairs the degree of compression. We demonstrate numerically that soliton enhancement can be restored to some extent and the compressed soliton can be stabilized, provided that SSFS is canceled by a second pump wave. Still the available compression degree is considerably smaller than that in the Raman-free nonlinear fibers.