Temporal optical besselon waves for high-repetition rate picosecond sources

Abstract

We analyse the temporal properties of the optical pulse wave that is obtained by applying a discrete set of spectral π/2 phase shifts to continuous-wave light that is phase-modulated by a temporal sinusoidal wave. We develop an analytical model to describe this new optical waveform that we name ‘besselon’. We also discuss the reduction of sidelobes in the pulse intensity profiles by means of an additional spectral π phase shift, and show that the resulting pulses can be efficiently time-interleaved. The various predicted properties of the besselon are confirmed by experiments demonstrating the generation of low duty cycle, high-quality pulses at repetition rates up to 28 GHz.

Ultrashort pulse generation from binary temporal phase modulation

“…Other values of this factor could provide another degree of freedom to be explored. 14 Our numerical results demonstrate that binary phase modulation associated with a convenient spectral phase processing can be potentially involved in various applications such as ultrashort pulse generation 9 , optical sampling 36 or noiseless application scheme. 37 We can also anticipate that the proposed scheme could be combined with an initial phase modulation which frequency linearly varies over time.…”

“…6,7 A versatility in the choice of a spectral phase profile opens up fruitful possibilities to tailor characteristics of pulse trains. As it has been recently experimentally demonstrated, the use of π/2 spectral phase shifts to replace the quadratic spectral phase profile 8,9 induces a noticeable decrease of the spurious background and of unwanted sidelobes enabling the generation of Gaussian Fourier-transform limited structures.…”

All-fibered high-quality low duty-cycle 40-GHz picosecond pulse source based on nonlinear compression of besselons

“…N INT RO DUCT IO N GOAL : Ultrashort pulse train generation at high repetition rates using a simple all optical setup ~ps 𝑇 0 = 1/𝑓 𝑚 𝒇 𝒎 ~5-100 GHz Duty Cycle, Bessel function of the first kind Τ 𝛑 𝟐 phase shift between two subsequent harmonics To produce a train of Fourier-transform-limited pulses a triangular spectral phase should be imprinted Theory Experiment 𝑓 𝑚 = 40 GHz, 𝐴 𝑚 = 1.22 rad • Background-free • FWHM = 5.4 ps • Duty cycle = 0.22 B E S S E LO NIII.NO NLINEAR CO M PRESSIO NFor more details refer to :[3],[6] Background-free pulse train• Sub-ps pulses at (1 : 5) x 40 GHz• All-optical setup of low complexity• Significant improvement of the results × 9 times improvement…”