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Updated: May 22, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Formation of X-pulses in periodically gain/loss modulated materials
Yurii Loiko1, Muriel Botey, Ramon Herrero
1Departament de Física, Universitat Autònoma de Barcelona, Bellaterra, Spain.
Abstract:
We propose a versatile and efficient technique for the formation of X-pulses in materials with a periodical gain/loss modulation on the wavelength scale. We show that in such materials the strong wave-vector anisotropy of amplification/attenuation of the Bloch modes enables the shaping of ultra-short light pulses around the edges of the first Brillouin zone. X-pulses generation is numerically demonstrated and the optimum conditions are derived; specific characteristics of X-pulses can be tailored by appropriate selection of the geometry and modulation depth.
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