Space-time duality and the theory of temporal imaging

Pulse shaping using the optical Fourier transform technique - for ultra-high-speed signal processing

“…We generate a 1.6 ps flat-top pulse, and characterise it in a demultiplexing experiment at 320 Gbit/s. Numerical simulations based on a model derived from the space-time duality theory [4] show very good agreement with experimental results.…”

The Application based on Fourier Transform in Time Lens

“…And about the principles and conditions for the time lens imaging, Kolner made a detailed discussion [1][2] .…”

“…In addition, in spatial optical processing, space lens can be viewed as a spatial phase modulator, and it provides a secondary phase modulation for space position variables, so people provide a secondary phase modulation for time variables using the similar principle of diffraction and dispersion transport. Similar to the spatial imaging systems, people set up a time imaging system and call it the time lens [1][2]. We know the space lens can achieve the function of compression and amplification imaging and spatial Fourier transform on the focal length of the light field.…”

Observations in Respect of Real Time Temporal Cloaking/Uncloaking at Microwave Frequencies

“…Here light was manipulated using an intensity-dependent refractive medium to create a temporal gap within which time events could be hidden. In 2012, Fridman et al created the conditions [2] that permit temporal cloaking by exploiting the space-time duality associated with diffraction and dispersion [3]. Implementation at optical frequencies used a split time-lens created by Bragg scattering via four-wave mixing with constant frequency pump wave and a linear frequency chirped wave followed by a positive dispersion single mode fiber.…”

“…Here we choose μ 1 = −1 GHz/ns with a period of 10 ns to help generate pulse strings according to Equation (3). A randomly chosen data pattern 101101, whose minimum pulse duration is 1ns as shown in Fig.…”