Pulse compression and pedestal suppression by self-similar propagation in nonlinear optical loop mirror

Multi wavelength ultrashort pulse is of great significance in the scientific field. The dual-wavelength self-similar (SS) pulse mode-locked fiber laser with topological insulator (TI) is studied in this paper. The study on evolution of dual-wavelength SS pulse is based on Ginzburg-Landau equation (GLE) by split-step Fourier transforms (SSFT). The results have a high theoretical significance and value in practice.

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Low pedestal sub-17 fs pulse generation through cascaded self-similar compression in photonic crystal fibers

Lidiya¹,

Raja²,

Varshney³

2021

J. Opt.

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We propose a realistic numerical model based on cascaded self-similar pulse compression to generate low pedestal ultrashort pulses at 2.5 µm. Self-similarity in photonic crystal fibers (PCFs) has been attained by modelling exponentially dispersion decreasing and exponentially nonlinearity increasing chalcogenide PCFs. The tapered PCF (TPCF) model is theoretically designed using the fully vectorial effective index method (FVEIM) to obtain accurate effective refractive index, group velocity dispersion (GVD), and Kerr nonlinearity values with low computation time. Initially, fundamental soliton compression in As2S3 tapered PCF is being investigated for the pedestal-free reduction of the pulse width. Subsequently, the compression factor is further enhanced in the As2Se3 PCF-based nonlinear optical loop mirror. The numerical outcomes reveal a compression of 1 ps pulse down to a pulse width of 16.6 fs with a peak power of 116 W in a total fiber length of L = 61 cm.

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Pulse compression and pedestal suppression by self-similar propagation in nonlinear optical loop mirror

Cited by 4 publications

References 36 publications

Engineering the temporal shape of a chirped pulse compressed in a pressure-gradient-based cascaded hollow-core photonic crystal fiber

Engineering the temporal shape of a chirped pulse compressed in a pressure-gradient-based cascaded hollow-core photonic crystal fiber

Dual-Wavelength Self-Similar Pulse Fiber Laser Based On Topological Insulator

Low pedestal sub-17 fs pulse generation through cascaded self-similar compression in photonic crystal fibers

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