We demonstrate an erbium-doped fiber laser passively mode-locked by a multilayer molybdenum disulfide (MoS(2)) saturable absorber (SA). The MoS(2) is prepared the chemical vapor deposition (CVD) method and transferred onto end-face of connector. Taking advantage excellent absorption fabricated MoS(2)-based SA, stable mode locking obtained at pump threshold 31 mW. Resultant output soliton pulses have central wavelength, spectral width, pulse duration, repetition rate 1568.9 nm, 2.6 1.28 ps,...

We report an 1150-nm diode-pump passively Q-switched Ho3+-doped ZBLAN fiber laser using topological insulator (TI): Bi2Te3 as the saturable absorber (SA). The TI: prepared cost-effective hydrothermal intercalation/exfoliation method was dropped onto a CaF2 substrate to fabricate free-space SA component. It has low peak intensity of 2.12 MW/cm2 and high modulation depth 51.3% measured at 2 μm. Inserting this component into linear-cavity laser, stable pulses 2979.9 nm were obtained with...

We demonstrate a passively Q-switched erbium-doped fiber laser (EDFL) based on few-layer MoS <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> as saturable absorber (SA). Few-layer is prepared by the chemical vapor deposition method. The transferred onto end face of connector to form fiber-compatible -based SA. saturation intensity and modulation depth SA are measured be 0.43 MW/cm <sup xmlns:xlink="http://www.w3.org/1999/xlink">2</sup>...

Abstract Interlayer charge‐transfer (CT) in 2D atomically thin vertical stacks heterostructures offers an unparalleled new approach to regulation of device performance optoelectronic and photonics applications. Despite the fact that saturable absorption (SA) involves highly efficient optical modulation space time domain, lack explicit SA mechanism at nanoscale prevents this feature from realizing nanophotonic modulation. Here, enhancement response via CT WS 2 /graphene heterostructure is...

An actively mode-locked optoelectronic oscillator (OEO) is proposed and demonstrated to generate chirp-free microwave pulse trains with variable repetition rates. Time-domain mode locking realized by using an electric signal modulator achieve amplitude modulation of the generated in OEO cavity. Through setting externally applied frequency be equal integral multiple free spectral range, a train low close-to-carrier phase noise generated. In experiment, rates 179.94 360.00 kHz are through...

We report an erbium-doped fiber laser passively Q-switched by a few-layer molybdenum disulfide (MoS2) saturable absorber (SA). The MoS2 is grown the chemical vapor deposition method and transferred onto end-face of connector to form fiber-compatible SA. cavity constructed using three-port optical circulator Bragg grating (FBG) as two end-mirrors. Stable pulses are obtained with pulse duration 1.92 μs at 1560.5 nm. By increasing pump power from 42 204 mW, repetition rate can be widely changed...

Graphene/WS2 (G/WS2) van der Waals (vdW) heterostructures are utilized as saturable absorbers (SAs) in compact mode-locked fiber lasers operating the telecommunication L-band for first time. The interlayer coupling is confirmed by Raman and photoluminescence spectra. In comparison with pure WS2, heterostructure exhibits excellent nonlinear optical properties terms of larger modulation depth lower saturation intensity due to strong coupling. By incorporating G/WS2-based SA into an...

In recent years, high-performance thin-film lithium niobate (TFLN) electro-optic (EO) modulators boost the fast development of highly integrated, low loss, and large comb spacing EO frequency combs. Furthermore, ultra-short optical pulse trains (USOPTs) can be generated by temporal domain compression comb, which play an essential role in photonic sampling analog-to-digital conversion. Here, we demonstrate a flat broadband based on packaged TFLN chip including monolithic integrated intensity...

A delay-matched self-feedback injection-locked optoelectronic oscillator (SIL-OEO) is proposed to realize wideband tunable microwave signal generation, which are featured with ultra-low phase noise and low spurs. In the OEO cavity, two cascaded electro-optic Mach-Zehnder modulators (MZMs) used form loops an identical time delay. Thereinto, one loop serves as oscillation path, other acts injection locking path. Benefited from effect, gain of dominant mode far exceeds that unwanted side modes,...

Ultrafast laser frequency tuning is a crucial function in numerous applications, including light detection and ranging (LiDAR), optical coherence tomography (OCT), spectroscopy. In general, realized via the motion of mechanical structures, frequency-swept filters, or Pockels effect cavity. Nevertheless, maximum rate sweep are smaller than 107 THz/s 1 GHz, respectively, due to inherent speed limitation existing mechanisms. Here, we propose demonstrate brand-new concept for ultrafast tuning,...

Abstract Reinforcement learning is an indispensable branch of artificial intelligence (AI), referring to the technology and methods maximizing rewards from uncertain environment. As Moore’s law coming end, operation speed energy consumption advanced integrated circuits are gradually unable meet ever-increasing requirements reinforcement learning. In recent years, photonic accelerator evolves as a powerful candidate solve this issue. Here, brand-new based on nonlinear optoelectronic...

The stable multipulse emission from an erbium-doped mode-locked fiber laser in dissipative soliton resonance (DSR) regime is numerically and experimentally investigated. It shows that the operation of DSR, all pulses have identical characteristics. number these determined by initial conditions, keeps constant with growth pump power. Experimental results match well theoretical simulations. In experiment, we obtain as high 86 dual-wavelength DSR pulses, which same characteristics are equally...

A theoretical model and its calculation method are proposed to simulate an actively mode-locked optoelectronic oscillator (OEO) based on electric amplitude modulation. The includes modulation achieve mode locking convolution of signal filter impulse response function selection. Numerical simulation is carried out through enhancing the calculating time window integral multiple roundtrip employing pulse tracking with a precise delay. Through using this model, waveform, spectrum phase noise...

Dissipative solitons (DSs) are self-organized localized structures in non-conservative systems, which require a continuous energy exchange with external sources. In addition to parameter-invariant stationary DSs, there exists variety of dynamical ones manifesting breathing behaviors. Such intriguing phenomena, termed as soliton pulsations, have been widely studied recent years under the impetus advances real-time spectroscopy. Here, we experimentally investigate various pulsating...

We report a tunable passively Q-switched Ho(3+)-doped ZBLAN fiber laser at 3 μm waveband using Fe(2+):ZnSe crystal as saturable absorber (SA) and plane ruled grating in Littrow configuration wavelength tuning element. Stable pulse trains with ~85 nm range from 2919.1 to 3004.2 spectrum bandwidths of ~1 were achieved for the an initial transmission (IT) 69%. Pulse duration increased 1.23 μs 2.35 repetition rate decreased 96.1 kHz 43.56 extension towards long direction. With IT increasing 79%...

The pulse dynamics of harmonic mode-locking in a dissipative soliton resonance (DSR) region an erbium-doped fiber ring laser is investigated at different values anomalous dispersion. mode-locked by nonlinear polarization rotation technique. By inserting 0–200 m dispersion single-mode the cavity, cavity length changed from 17.3 to 217.3 m, and corresponding ranges −0.27 −4.67  ps2. observed results show that tuning range repetition rate under DSR condition highly influenced Furthermore, it...

We report on supercontinuum generation in a highly nonlinear fiber (HNLF) pumped by noise-like pulses (NLPs) emitted from compact ring laser. The erbium-doped laser is constructed using an optical integrated component and mode-locked the polarization rotation technique. produces NLPs with 3-dB spectral bandwidth of 60.2 nm, repetition rate 9.36 MHz, pulse energy 2.8 nJ. Numerical simulations reproduce experiment. are then launched into 110-m-long HNLF 20-dB width over 500 nm obtained. Such...

Generation of dissipative soliton resonance (DSR) is numerically investigated in an all-normal-dispersion Yb-doped fiber laser mode-locked by a real saturable absorber (SA). In the simulation model, SA includes both absorption and reverse (RSA) effects. It found that RSA effect induced material itself plays dominant role generating DSR pulses. We also systematically analyze influence key parameters on evolution pulses cavity. Our results not only offer insight into underlying mechanism...

To correct wavefront aberrations, commonly employing proportional-integral control in adaptive optics (AO) systems, the process depends strictly on response matrix of deformable mirror. The alignment error between Hartmann-Shack sensor and mirror is caused by various factors AO systems. In conventional method, can be recalibrated to reduce impact error, but cannot eliminated. This paper proposes a method based deep learning model (DLCM) compensate for eliminating dependence matrix. Based...

Soliton explosions are among the most striking soliton phenomena in nonlinear dissipative systems. In this regime, quasi-stable solitons suffer abrupt structural collapses and then recover to their original state. Here, we report on first experimental observation of triggered by vector collisions a polarization-multiplexed ultrafast fiber laser. The laser simultaneously generates two orthogonally polarized pulse trains with different repetition rates, which enables periodic cavity. Based...

In this paper, we propose and experimentally demonstrate a stable multi-wavelength fiber laser at 1.5 μm with single-mode (SMF). The Sagnac loop structure 48.6:51.4 coupler 2 km SMF has an intensity-dependent loss, which contributes to suppress the mode competition in cavity leads steady output. experiment, five lasing wavelengths are obtained pump power of 300 mW 980 nm. demonstrated great potential for applications optical communications sensing systems.