Low-noise fiber femtosecond laser with cascade acoustic-optical pulse picker for time-resolved imaging

Optics Communications, Journal Year: 2025, Volume and Issue: unknown, P. 131583 - 131583

Published: Feb. 1, 2025

Language: Английский

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Real-Time Transition Dynamics of Harmonically Mode-Locked Femtosecond Ultralong Ring Fiber Lasers

Journal of Lightwave Technology, Journal Year: 2024, Volume and Issue: 42(13), P. 4643 - 4649

Published: Feb. 26, 2024

The transition dynamics between harmonic mode-locking states in Raman-assisted ultralong ring fiber lasers operating the C-Band are experimentally studied resonators of up to 5.4 km, capable generating ultrashort pulses with energies order 0.6 μJ and durations below 200 fs, repetition rates as low 38 kHz, which allow for real-time monitoring pulse dynamics. Output signal is monitored through time-stretched dispersive Fourier transform technique, confirming expected solitonic behaviour associated quasi-lossless extended cavity, dynamic tunability a variety intermediate transient states. Transitions stable mode-locked from lower higher harmonics shown be mediated by formation soliton-like mutually attractive pairs that merge after number cycles. absence direct path some modes has been identified, can have important implications system optimization, inform design tunable operation.

Language: Английский

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Review on Principal and Applications of Temporal and Spatial Beam Shaping for Ultrafast Pulsed Laser

Photonics, Journal Year: 2024, Volume and Issue: 11(12), P. 1140 - 1140

Published: Dec. 4, 2024

Ultrafast or ultrashort pulsed lasers have become integral in numerous industrial applications due to their high precision, non-thermal interaction with materials, and ability induce nonlinear absorption. These characteristics expanded use microfabrication, semiconductor processing, automotive engineering, biomedical fields. Temporal pulse shaping reduces laser durations, often shorter timescales than many physical chemical processes, enabling greater control. Meanwhile, spatial improves efficiency precision micro- nanofabrication applications. Advances optical parametric amplifiers (OPAs) chirped-pulse (CPAs) allowed for more refined temporal shaping, ensuring the preservation of peak power while achieving durations. Additionally, light modulators (SLMs) facilitated sophisticated beam which, when combined ultrafast lasers, supports like computer-generated holography nanoscale fabrication. developments underscore growing utility versatility both research contexts.

Language: Английский

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Impact of polarization and gain control in the optimization of output pulse properties in ultralong ultrafast ring fibre lasers

Results in Physics, Journal Year: 2024, Volume and Issue: 64, P. 107936 - 107936

Published: Aug. 28, 2024

The application of limited polarization and gain control to the recently demonstrated mode-locked ultralong ultrafast, EDFA-based Raman-assisted pulsed ring fibre lasers is shown reduce output pulse duration noise, as well increase peak power in cavities 10 km with repetition rates low 38 kHz durations below 200 fs FWHM, which remain effectively depolarized at optimized case, accompanied by improved mode-locking stability. impact state optimization prior doped-fibre amplification section on these devices studied for different lengths fibre, harmonic modes, Raman values. Peak nearly doubled thanks temporal compression spectral broadening, a wide choice regimes operation dynamically available given cavity length, allowing modification laser towards targeted characteristics.

Language: Английский

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Timing jitter in ultralong ultrafast ring fiber lasers

Published: July 14, 2024

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Recent progress in femtosecond pulsed ultralong fiber ring laser sources

Published: May 31, 2023

Ultrafast-ultralong ring fiber lasers represent a new passively mode-locked laser architecture reliant on the use of Raman-assisted nonlinearity management over cavities extending tens kilometers and fast, polarization-insensitive saturable absorption. These sources are capable supporting generation stable pulses shorter than 200 fs with ultra-low repetition rates few kHz, overcoming previous limitations to pulse duration peak power imposed by dispersive effects. The unique characteristics this family ultrafast oscillators makes them suitable for broad range applications. In invited talk we will review some latest advances topic, focusing optimal design implementation such lasers.

Language: Английский

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Optimization of Output Pulse Properties in Ultralong Ultrafast Ring Fibre Lasers Using Polarization and Gain Control

Published: Aug. 21, 2023

Limited polarization control in mode-locked ultralong pulsed ring lasers based on standard telecommunications fiber is shown to reduce pulse duration, noise and chirp increase peak power with values exceeding 1.5 MW.

Language: Английский

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