Mode-locking ≈ Mode-locking
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Resolving the build-up of femtosecond mode-locking with single-shot spectroscopy at 90 MHz frame rate Open
Mode-locked lasers have enabled some of the most precise measurements ever performed, from attosecond time-domain spectroscopy to metrology with frequency combs. However, such extreme precision belies the complexity of the underlying mode-…
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All polarization-maintaining fiber laser architecture for robust femtosecond pulse generation Open
We report on a novel architecture for robust mode-locked femtosecond fiber lasers using a nonlinear optical loop mirror with all polarization-maintaining fibers. Due to a nonreciprocal phase shift, the loop mirror can be operated in a comp…
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Self-injection locking of a laser diode to a high-Q WGM microresonator Open
We present the analysis of the self-injection locking of a single-frequency laser diode to a high-Q whispering gallery mode (WGM) microresonator with Rayleigh backscattering. Simple analytical formulas for the width of the locking band and…
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Microresonator Kerr frequency combs with high conversion efficiency Open
Microresonator‐based Kerr frequency comb (microcomb) generation can potentially revolutionize a variety of applications ranging from telecommunications to optical frequency synthesis. However, phase‐locked microcombs have generally had low…
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Tungsten disulfide saturable absorbers for 67 fs mode-locked erbium-doped fiber lasers Open
In this paper, we demonstrate 67 fs pulse emitting with tungsten disulfide (WS2) in mode-locked erbium-doped fiber (EDF) lasers. Using the pulsed laser deposition method, WS2 is deposited on the surface of the tapered fiber to form the eva…
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Vector soliton fiber laser passively mode locked by few layer black phosphorus-based optical saturable absorber Open
We report on the optical saturable absorption of few-layer black phosphorus nanoflakes and demonstrate its application for the generation of vector solitons in an erbium-doped fiber laser. By incorporating the black phosphorus nanoflakes-b…
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Kerr-lens mode-locked bidirectional dual-comb ring laser for broadband dual-comb spectroscopy Open
Fourier-transform spectroscopy is an indispensable tool for analyzing chemical samples in scientific research as well as the chemical and pharmaceutical industries. Recently, its measurement speed, sensitivity, and precision have been show…
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Mode-locked Er-doped fiber laser based on PbS/CdS core/shell quantum dots as saturable absorber Open
Previously, PbS/CdS core/shell quantum dots with excellent optical properties have been widely used as light-harvesting materials in solar cell and biomarkers in bio-medicine. However, the nonlinear absorption characteristics of PbS/CdS co…
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MXene-based saturable absorber for femtosecond mode-locked fiber lasers Open
We report simple and compact all-fiber erbium-doped soliton and dispersion-managed soliton femtosecond lasers mode-locked by the MXene Ti3C2Tx. A saturable absorber device fabricated by optical deposition of Ti3C2Tx onto a microfiber exhib…
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Revealing the behavior of soliton buildup in a mode-locked laser Open
Real-time spectroscopy based on an emerging time-stretch technique can map the spectral information of optical waves into the time domain, opening several fascinating explorations of nonlinear dynamics in mode-locked lasers. However, the s…
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Intelligent programmable mode-locked fiber laser with a human-like algorithm Open
Nonlinear polarization evolution-based passively mode-locked fiber lasers with ultrafast and high peak power pulses are a powerful tool for engineering applications and scientific research. However, their sensitivity to polarization limits…
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Femtosecond harmonic mode-locking of a fiber laser at 327 GHz using a bulk-like, MoSe_2-based saturable absorber Open
We experimentally demonstrate the use of a bulk-like, MoSe2-based saturable absorber (SA) as a passive harmonic mode-locker for the production of femtosecond pulses from a fiber laser at a repetition rate of 3.27 GHz. By incorporating a bu…
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Fundamental and harmonic mode-locking at 21 μm with black phosphorus saturable absorber Open
We report mode-locking in holmium-doped all-fiber laser based on black phosphorus saturable absorber. The generated solitons are centered at 2094 nm with bandwidth reaching 4.2 nm and pulse duration of 1.3 ps. In harmonic mode-locking, up …
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Spatiotemporal Mode-Locking in Lasers with Large Modal Dispersion Open
Dissipative nonlinear wave dynamics have been investigated extensively in mode-locked lasers with single transverse mode, whereas there are few studies related to three-dimensional nonlinear dynamics within lasers. Recently, spatiotemporal…
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102 fs pulse generation from a long-term stable, inkjet-printed black phosphorus-mode-locked fiber laser Open
We demonstrate a long-term stable, all-fiber, erbium-doped femtosecond laser mode-locked by a black phosphorus saturable absorber. The saturable absorber, fabricated by scalable and highly controllable inkjet printing technology, exhibits …
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Highly stable MXene (V <sub>2</sub> CT <sub>x</sub> )-based harmonic pulse generation Open
MXene as a novel two-dimensional (2D) material exhibits a lot of advantages in nonlinear optics. However, the common MXene, Ti 3 C 2 T x and Ti 2 CT x nanosheets, easily suffer from degradation under ambient conditions, greatly limiting th…
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Mode-locked Tm fiber laser using SMF-SIMF-GIMF-SMF fiber structure as a saturable absorber Open
We demonstrate a mode-locked all-fiber Tm laser using a single mode-step index multimode-graded-index multimode-single mode fiber structure as a saturable absorber based on the nonlinear multimodal interference. Stable fundamentally mode-l…
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Multiple-soliton in spatiotemporal mode-locked multimode fiber lasers Open
Experimental observations of spatiotemporal mode-locked multiple-soliton, including harmonic mode locking and multiple pulses, in multimode fiber (MMF) lasers are reported. Numerical simulations are conducted to investigate the nonlinear d…
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Platicon microcomb generation using laser self-injection locking Open
The past decade has witnessed major advances in the development and system-level applications of photonic integrated microcombs, that are coherent, broadband optical frequency combs with repetition rates in the millimeter-wave to terahertz…
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Soliton collision induced explosions in a mode-locked fibre laser Open
Soliton explosion refers to a striking nonlinear dynamics in dissipative systems. In this state, a dissipative soliton collapses but returns back to its original state afterwards. Yet, the origin of such exotic soliton dynamics remains elu…
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Recent progress of pulsed fiber lasers based on transition-metal dichalcogenides and black phosphorus saturable absorbers Open
Transition-metal dichalcogenides (TMDCs) and black phosphorus (BP) are typical 2D materials with layer-dependent bandgaps, which are emerging as promising saturable absorption materials for pulsed fiber lasers. In this review, we discuss t…
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Intelligent control of mode-locked femtosecond pulses by time-stretch-assisted real-time spectral analysis Open
Mode-locked fiber lasers based on nonlinear polarization evolution can generate femtosecond pulses with different pulse widths and rich spectral distributions for versatile applications through polarization tuning. However, a precise and r…
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All-polarization-maintaining dual-wavelength mode-locked fiber laser based on Sagnac loop filter Open
We demonstrate an all polarization-maintaining (PM) fiber based dual-wavelength mode-locked Er-fiber laser. A nonlinear amplifying loop mirror (NALM) with an intracavity nonreciprocal phase shifter is used for self-started mode-locking. A …
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Self-organized compound pattern and pulsation of dissipative solitons in a passively mode-locked fiber laser Open
We experimentally observe soliton self-organization and pulsation in a passively mode-locked fiber laser. The optomechanical interaction in the optical fiber is key to the formation of equidistant soliton bunches. These solitons simultaneo…
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Short Terahertz Pulse Generation from a Dispersion Compensated Modelocked Semiconductor Laser Open
Dispersion compensation is vital for the generation of ultrashort and single cycle pulses from modelocked lasers across the electromagnetic spectrum. It is typically based on addition of an extra dispersive element to the laser cavity that…
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Active mode-locking optoelectronic oscillator Open
The optoelectronic oscillator (OEO) has been widely investigated to generate ultra-pure single-frequency microwave signals. In this study, we propose and experimentally demonstrate an active mode-locking optoelectronic oscillator (AML-OEO)…
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Tunable noise-like pulse generation in mode-locked Tm fiber laser with a SESAM Open
We report on a tunable noise-like pulse (NLP) generation in a mode-locked Tm fiber laser with a SESAM. A tuning range of 1895-1942 nm, while keeping the spectral bandwidth of 10-19 nm under NLP mode-locked operation, was obtained by a tuna…
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Saturable absorber based on a single mode fiber – graded index fiber – single mode fiber structure with inner micro-cavity Open
An Er-doped mode-locked fiber laser with a saturable absorber based on single mode - graded index multimode - single mode fiber (SMF-GIMF-SMF) with inner micro-cavity is demonstrated. The modulation depth of the saturable absorber was meas…
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Ultra-broadband dissipative soliton and noise-like pulse generation from a normal dispersion mode-locked Tm-doped all-fiber laser Open
We report generation of ultra-broadband dissipative solitons and noise-like pulses from a simple, fully fiberized mode-locked Tm-doped fiber laser. The oscillator operates in the normal net dispersion regime and is mode-locked via nonlinea…
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All-fiberized, femtosecond laser at 1912 nm using a bulk-like MoSe_2 saturable absorber Open
An all-fiberized, mode-locked fiber laser that operates in the 1912 nm region with a saturable absorber (SA) that is based on a composite consisting of bulk-like, molybdenum diselenide (MoSe2) particles and polyvinyl alcohol (PVA), is expe…