Supercontinuum generation in dispersion-varying microstructured optical fibers

This manuscript presents a ring-core Bragg Fiber (RC-BF) for orbital angular momentum (OAM) modes propagation and supercontinuum generation. The proposed RC-BF is composed of alternating layers of soft glasses SF57 and LLF1 to render high nonlinearity to the fiber. Mode analysis using fullvectorial finite element method resulted in obtaining HE/EH modes to support vector modes as well as orbital angular momentum modes. The optimized fiber supports 22 OAM modes and exhibits a zerodispersion wavelength (ZDW). The small effective area of Fiber 3 aided in achieving the highest nonlinearity, γ = 91.51 W −1 km −1 . A near-infrared supercontinuum is generated with a 35 dB flatness over a bandwidth of ∼1087 -2024 nm in a 20 cm long RC-BF using a chirp-free hyperbolic secant pulse of width 200 fs and peak power of 5 kW.INDEX TERMS Bragg fiber, finite element method, OAM modes, zero-dispersion wavelength, supercontinuum generation.

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“…For SF57, τ 1 and τ 2 are 5.5 fs and 32.0 fs respectively [50]. GNLSE has been calculated involving the split-step Fourier method [51].…”

Section: Supercontinuum Generationmentioning

confidence: 99%

Orbital Angular Momentum Mode Propagation and Supercontinuum Generation in a Soft Glass Bragg Fiber

et al. 2023

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“…Evolution of pulse width as it makes the round trips in the cavity can be simulated by solving the generalized nonlinear Schrödinger equation (GNLSE) using split-step Fourier method [48][49][50]. Figure 14 shows the evolution of pulse width (as it makes the round trips in the cavity) with different polarization configurations (corresponding to different α2 values).…”

Section: Numerical Simulationmentioning

confidence: 99%

Hybrid Mode Locked Fiber Ring Laser

Li¹,

Zhang²

2017

Preprint

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Mode locked pulse generation has been reported using both active and passive mode locking schemes. Active mode locking technique has been proven to be an effective way to generate high-repetition-rate pulses by incorporating a modulator inside the laser cavity. Compared to actively mode locked lasers, passively mode locked lasers can generate pulse train at ultrashort pulse width but with relatively lower repetition rate. Thus, it is a brilliant idea to build a hybrid mode locked system combining both active and passive mode lockers. In this review, several hybrid mode locked fiber ring laser systems are discussed and summarized. Hybrid mode locking is a promising method to generate high speed ultrashort optical pulses for fiber-optic telecommunication system.

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