The pulse energy in the ultrafast soliton fiber laser oscillators is usually limited by well-known wave-breaking phenomenon owing to absence of a desirable real saturable absorber (SA) with high power tolerance and large modulation depth. Here, we report type microfiber-based MoTe2 SA fabricated magnetron-sputtering deposition (MSD) method. High-energy free pulses were generated duration/pulse energy/average output 229 fs/2.14 nJ/57 mW 1.5 μm regime 1.3 ps/13.8 nJ/212 mW 2 μm regime,...

Two-dimensional (2D) layered transition metal dichalcogenides (TMDs) have attracted significant interest in various optoelectronic applications due to their excellent nonlinear optical properties. One of the most important TMDs is be employed as an extraordinary modulation material (e.g., saturable absorber (SA)) ultrafast photonics. The main challenge arises while embedding into fiber laser systems generate pulse trains and thus constraints practical applications. Herein, few-layered WS2...

The laser induced damage threshold and modulation depth of SAs are prominently improved with WSe₂ films.

A passively mode-locked thulium-doped fiber (TDF) laser was realized by employing chemical vapor deposited few-layer molybdenum ditelluride (MoTe2) as a saturable absorber (SA). The MoTe2 film transferred onto the waist of microfiber and then incorporated into TDF with typical all-fiber ring cavity configuration. Stable soliton pulses emitting at 1930.22 nm were obtained 3 dB bandwidth 4.45 nm, pulse duration 952 fs, an average power 36.7 mW.

In this Letter, high-quality WS2 film and MoS2 were vertically stacked on the tip of a single-mode fiber in turns to form heterostructure (WS2-MoS2-WS2)-based saturable absorbers with all-fiber integrated features. Their nonlinear absorption properties remarkable, such as large modulation depth (∼16.99%) small intensity (6.23 MW·cm-2). Stable pulses at 1.55 μm duration short 296 fs average power high 25 mW obtained an erbium-doped laser system. The results demonstrate that proposed...

Graphene based supercapacitors and batteries are a highly competitive choice for electrochemical energy storage devices, thanks to their ultrahigh power density, improved rate capability, long-term cyclability, remarkable safety.

Ultrafast pulse generation was demonstrated in a thulium-doped fiber laser mode-locked by magnetron-sputtering deposited WTe2 with modulation depth, nonsaturable loss, and saturable intensity of 31%, 34.3%, 7.6 MW/cm2, respectively. Stable soliton pulses could be obtained at 1915.5 nm central wavelength duration 1.25 ps, an average output power 39.9 mW, signal-to-noise ratio 95 dB. To the best our knowledge, this first demonstration WTe2-based absorbers lasers 2 μm regime.

In this paper, we demonstrate a high-damage-resistant tungsten disulfide saturable absorber mirror (WS2-SAM) fabricated by magnetron sputtering technique. The WS2-SAM has an all-fiber-integrated configuration and merit because the WS2 layer is protected gold film so as to avoid being oxidized destroyed at high pump power. Employing in Erbium-doped fiber laser (EDFL) with linear cavity, stable Q-switching operation achieved central wavelength of 1560 nm, repetition rates ranging from 29.5 kHz...

Abstract Group IVB transition metal dichalcogenides (TMDs) have attracted significant interests in photoelectronics due to their predictable superior physical properties compared group VIB (Mo and W) TMDs. However, the nonlinear optical ultrafast photonic devices based on TMDs remained unexplored so far. Herein, absorption of HfS 2 nanosheets (NSs) prepared by liquid exfoliation is demonstrated. The usage as a new device for high‐energy ultrashort pulse generation fiber laser reported first...

Large-area and highly crystalline transition metal dichalcogenides (TMDs) films possess superior saturable absorption compared to the TMDs nanosheet counterparts, which make them more suitable as excellent absorbers (SA) for ultrafast laser technology.Thus far, nonlinear optical properties of large-scale WSe 2 its applications in photonics have not yet been fully investigated.In this work, chemical vapor deposition (CVD) grown with high quality are studied use a broadband SA passively...

We demonstrated a simple and batch-producible fiber-optic sensor based on hybrid Fabry-Pérot (FP) configuration for simultaneous pressure temperature sensing. The proposed head chips are batch fabricated by double-sided anodic bonding of through-holes-array-structured glass wafer two silicon wafers. silicon-glass-silicon sandwich structure constructs serially connected low-finesse FP cavities naturally. first cavity (FP <sub xmlns:mml="http://www.w3.org/1998/Math/MathML"...

We propose a novel fiber-optic Fabry-Perot interferometric (FFPI) temperature sensor based on differential pressure resulting from thermal expansion of sealed air. A thin silicon diaphragm is sandwiched between two micro-circular cavity-structured Pyrex plates to construct FP and an air cavity. The induces variation cavities thus the deformation diaphragm, which transfers change into cavity length shift interferometer. Theory analysis results indicate that temperature-sensitivity can be...

With the magnetron-sputtering deposition method, α phase indium selenide (α-In2Se3) was developed into a saturable absorber (SA) with wideband absorption property at 800, 1560, and 1930 nm. After inserting α-In2Se3 SA erbium-doped fiber laser (EDFL) thulium-doped (TDFL) systems, we can easily obtain stable soliton pulse trains. The duration/pulse energy/slope efficiency for EDFL TDFL were 276 fs/2.03 nJ/15.8% 1.02 ps/7.1 nJ/23.5%, respectively. These results showed that MSD-grown could be...

The development of simple and sensitive sensors with the capability simultaneously detecting magnetic field intensity its direction in three-dimensional (3D) space is a technical imperative for detection. In this paper, we first demonstrated mechanism anisotropic manipulation ferromagnetism nanoparticles (FMNPs) non-continuous fluid film aid varying fields. Second, based on distribution FMNPs around an optical fiber, fabricated vector magnetometer error ±1.9° sensitivity 222.0 pm/mT,...

We demonstrate an Er-doped fiber laser (EDFL) mode-locked by a MoS2 saturable absorber (SA), delivering 256 fs, 2 nJ soliton pulse at 1563.4 nm. The nonlinear property of the SA prepared magnetron sputtering deposition (MSD) is measured with modulation depth (MD) ∼19.48% and intensity 4.14 MW/cm2. To best our knowledge, generated has highest energy among reported EDFLs based on transition metal dichalcogenides (TMDs). Our results indicate that MSD-grown SAs could offer exciting platform for...

A demodulation algorithm based on absolute phase recovery of a selected monochromatic frequency is proposed for optical fiber Fabry-Perot pressure sensing system. The uses Fourier transform to get the relative and intercept unwrapped phase-frequency linear fit curve identify its interference-order, which are then used recover phase. simplified mathematical model polarized low-coherence interference fringes was established illustrate principle algorithm. Phase unwrapping selection were...

We demonstrate a simple Fe <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> O xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> nanoparticles (FONPs) based Q-switched fiber laser that is able to generate stable nanosecond pulses with single-wavelength or multiwavelength regimes. In the lasing scheme, generates 613-ns pulse average output power of 41.2 mW, energy 321.3 nJ, and signal-noise-ratio 54.4 dB. achieved 18-wavelength channels...

We propose a new wavelength-division-multiplexing method for extrinsic fiber Fabry-Perot interferometric (EFPI) sensing in polarized low-coherence interferometer configuration. In the proposed method, multiple LED sources are used with different center wavelengths, and each is by specific channel, therefore spatial frequency of interferogram channel can be separated. A bandpass filter to extract EFPI thus cavity length identified through demultiplexing. successfully demonstrate simultaneous...

We demonstrated a novel ultracompact fiber-optic micro-Michelson interferometer (MMI) for high temperature sensing. In the MMI structure, 45° angled reflector is polished at tip of single mode fiber using fiber-lensing machine. This divides core into two parts and splits inputting light beams producing Michelson interference fringe. The experimental results indicate that proposed sensor has average sensitivity 13.32 pm/°C as increases from 19 °C to 950 °C. With all-glass assembly-free-based...

Abstract Integrated photonics are expected to replace the conventional free‐space optical systems, yet there remains a challenge of low nonlinear response due small refractive index and short interaction length. Here, large‐area monolayer MoS 2 is used facilitate excellent response, pump strategy proposed with respect spontaneous four‐wave mixing in visible spectral range. The external incident from top resonates GaN microdisk resonator thoroughly absorbed by generate via excitonic...

Transition metal dichalcogenides (TMDs) have been successfully used as broadband optical modulator materials for pulsed fiber laser systems. However, the nonlinear absorptions of exfoliated TMDs are strongly limited by their nanoflakes morphology with uncontrollable lateral size and thickness. In this work, we provide an effective method to fully explore properties MoSe2. Large-area high quality lattice MoSe2 grown chemical vapor deposition was adopted first time. The large-area shows...