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Temporal Airy–Talbot effect in linear optical potentials 被引量:1
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作者 Tianwen Han Hao Chen +2 位作者 wenwan li Bing Wang Peixiang Lu 《Chinese Optics Letters》 SCIE EI CAS CSCD 2021年第8期105-110,共6页
We investigate the Airy–Talbot effect of an Airy pulse train in time-dependent linear potentials.The parabolic trajectory of self-imaging depends on both the dispersion sign and the linear potential gradient.By impos... We investigate the Airy–Talbot effect of an Airy pulse train in time-dependent linear potentials.The parabolic trajectory of self-imaging depends on both the dispersion sign and the linear potential gradient.By imposing linear phase modulations on the pulse train,the Airy–Talbot effects accompanied with positive and negative refractions are realized.For an input composed of stationary Airy pulses,the self-imaging follows straight lines,and the Airy–Talbot distance can be engineered by varying the linear potential gradient.The effect is also achieved in symmetric linear potentials.The study provides opportunities to control the self-imaging of aperiodic optical fields in time dimension. 展开更多
关键词 Airy pulse Talbot and self-imaging effect DISPERSION linear potential
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Real-time observation of frequency Bloch oscillations with fibre loop modulation 被引量:2
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作者 Hao Chen NingNing Yang +9 位作者 Chengzhi Qin wenwan li Bing Wang Tianwen Han Chi Zhang Weiwei liu Kai Wang Hua Long Xinliang Zhang Peixiang Lu 《Light(Science & Applications)》 SCIE EI CAS CSCD 2021年第3期434-442,共9页
Bloch oscillations(BOs)were initially predicted for electrons in a solid lattice to which a static electric field is applied.The observation of BOs in solids remains challenging due to the collision scattering and bar... Bloch oscillations(BOs)were initially predicted for electrons in a solid lattice to which a static electric field is applied.The observation of BOs in solids remains challenging due to the collision scattering and barrier tunnelling of electrons.Nevertheless,analogies of electron BOs for photons,acoustic phonons and cold atoms have been experimentally demonstrated in various lattice systems.Recently,BOs in the frequency dimension have been proposed and studied by using an optical micro-resonator,which provides a unique approach to controlling the light frequency.However,the finite resonator lifetime and intrinsic loss hinder the effect from being observed practically.Here,we experimentally demonstrate BOs in a synthetic frequency lattice by employing a fibre-loop circuit with detuned phase modulation.We show that a detuning between the modulation period and the fibre-loop roundtrip time acts as an effective vector potential and hence a constant effective force that can yield BOs in the modulation-induced frequency lattices.With a dispersive Fourier transformation,the pulse spectrum can be mapped into the time dimension,and its transient evolution can be precisely measured.This study offers a promising approach to realising BOs in synthetic dimensions and may find applications in frequency manipulations in optical fibre communication systems. 展开更多
关键词 FIBRE BLOCH DIMENSION
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