Engineering Carbon Nanotube Saturable Absorber for Boosting Repetition Rate in a Harmonic Mode-Locked GHz Soliton Fiber Laser

ACS Photonics, Год журнала: 2025, Номер unknown

Опубликована: Янв. 15, 2025

GHz femtosecond fiber lasers are being developed to meet the demands of state-of-the-art applications such as high-speed optical communication and ablation-cooled material removal. Harmonic mode locking (HML) opens a portal generate ultrashort pulses. However, impact saturable absorber (SA) in controlling laser repetition rate has long been overlooked. Herein, we successfully boost HML ∼10 by engineering nonlinear absorption film-type single-walled carbon nanotube (SWCNT) SA. Our study first reports new inhibition for enhancement, transition from noise-like pulse (NLP) due reverse (RSA) SA, reveals that optimum SA enhancement should be characterized low effective modulation depth without RSA. Employing SWCNT-SA with ∼0.4% depth, demonstrate achievement 9.25 pulses at 914th harmonic order soliton laser. This represents, best our knowledge, highest reported physical mode-locked findings may provide general guidelines configuration practical while opening possibility versatile ultrafast sources.

Язык: Английский

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64 nm continuously tunable graphene-mode-locked erbium-doped fiber laser by tunable bandpass filter

Laser Physics, Год журнала: 2025, Номер 35(2), С. 025102 - 025102

Опубликована: Янв. 20, 2025

Abstract This paper demonstrates and characterizes a tunable wavelength ultrafast erbium-doped fiber laser (EDFL), enabled by bandpass filter (TBF) mode-locked with graphene thin film as the saturable absorber. The laser’s can be continuously tuned from 1507.5 nm to 1571.3 nm, covering broad range of 63.8 nm. Fourteen distinct wavelengths, spaced at 5 intervals, are recorded. variation in bandwidth pulse width across these wavelengths reveals values ranging 0.5 0.8 3.9 ps 6.6 ps, respectively, all fixed repetition rate 12.9 MHz. Analysis time-bandwidth product shows lowest value 0.34 1567.5 highest 0.46 These findings enhance understanding wavelength-tunable graphene-based EDFL operation, specifically through spectral filtering effect achieved TBF.

Язык: Английский

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Review of High-Power Continuous Wave Yb-Doped Fiber Lasers near 980 nm

Photonics, Год журнала: 2024, Номер 11(4), С. 365 - 365

Опубликована: Апрель 13, 2024

In this paper, the development of a high-power continuous wave (CW) fiber laser near 980 nm is reviewed. This review focused primary on power evolution resulting from designation Yb-doped fibers, which important in suppression amplified spontaneous emission (ASE) around 1030 nm. Current studies in-band ASE as limitation lasers are also summarized review.

Язык: Английский

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Mo4/3B2T2/Co3O4 vdW heterostructure as saturable absorber for ultrafast pulse generation

Optics & Laser Technology, Год журнала: 2024, Номер 180, С. 111599 - 111599

Опубликована: Авг. 11, 2024

Язык: Английский

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