An 80 W 350-2400 nm monolithic supercontinuum (SC) source is reported. The high-power SC generated in a uniform multi-core photonic crystal fiber (PCF) pumped by 1016 pulsed laser. specially designed PCF has seven 4.5 μm diameter cores, 0.85 air-filling fraction, and zero dispersion wavelength (ZDW) of 991 nm. laser delivers up to 114 average power, which believed be the highest currently reported for picosecond lasers working below 1020 In order ensure robust compact all-fiber structure,...

Abstract Here, the concept of generating higher‐order dispersive waves (DWs) via quasi‐phase‐matching (QPM) in periodically dispersion‐modulated liquid‐core fibers are demonstrated by distinct narrowband sidebands generated outside conventional supercontinuum (SC) spectrum. Through controlled partial core collapse, commonly used phase‐matching (PM) condition is amended an additional grating‐related term. This results generation ultrashort DWs grating parameters, extending SC spectrum up to 3...

A high-power transverse-mode-switchable all-fiber picosecond laser in a master-oscillator power-amplifier (MOPA) configuration is demonstrated. The master oscillator gain-switched diode delivering pulses with 25 MHz repetition rate at the wavelength of 1.06 μm. After multi-stage amplification ytterbium-doped fibers, average output power scaled to 117 W. mechanical long-period grating employed as fiber mode convertor achieve controllable conversion from fundamental (LP01) second-order (LP11)...

We experimentally demonstrate an all-fiber, ultraviolet-enhanced, supercontinuum generation in a specifically designed seven-core photonic crystal fiber pumped by picosecond Yb-doped master oscillator power amplifier (MOPA). The MOPA source is seeded giant-chirped mode-locked laser operating the dissipative-soliton-resonance (DSR) region. DSR achieved using nonlinear optical loop mirror (NOLM) with fundamental repetition rate of 4.5 MHz and central wavelength 1035 nm. An extremely wide...

This paper presents an all fiber high power picosecond laser at 1016 nm in master oscillator amplifier (MOPA) configuration. A direct amplification of this seed source encounters obvious gain competition with amplified spontaneous emission (ASE) ~1030 nm, leading to a seriously reduced efficiency. To suppress the ASE and improve efficiency, we experimentally investigate influence length residual on perforemance amplifier. The optimized MOPA exhibits average 50 W optical conversion efficiency 53%.

We report a hybrid passively mode-locked dumbbell-shaped fiber laser based on nonlinear optical loop mirror and amplifying fiber-loop mirror. The produced noise-like pulses with repetition rate of 8.85 MHz pulse energy 16.2 26.4 nJ from the two output ports, respectively. Several interesting phenomena are observed briefly discussed in paper.

This study introduces a novel meta-fiber design that combines single-mode fibers with thermally expanded cores and nano-printed high numerical aperture metalenses. These advanced meta-fibers feature enlarged mode field diameters, offering improved mechanical stability, reduced environmental sensitivity simplified metalens by minimizing wavefront curvature. The concept's validity is confirmed through metalenses, nanoprinted onto core fibers, demonstrating diffraction-limited focusing up to of...

We design a seven-core photonic crystal fiber with specifically designed dispersion and group velocity profile which is optimized for high-power visible supercontinuum (SC) generation pumped by ∼1-μm pulsed lasers. The has both large air-filling fraction effective mode field area. Additionally, the in-phase supermode of this exhibits an even distribution after modification. simulation results suggest that it great potential to generate SC extending 400 nm, highly desirable in biological applications.

Supercontinuum generation is a key process for nonlinear tailored light and strongly depends on the dispersion of underlying waveguide. Here we reveal dynamics soliton-based supercontinuum in case waveguide includes dispersive resonance. Assuming gas-filled hollow core fiber that Lorentzian-type term, effects such as multi-color wave emission cascaded four-wave mixing have been identified to be origin observed spectral broadening, greatly exceeding bandwidths corresponding non-resonant...

Soliton-based supercontinuum generation is a powerful approach for generating light with the desired properties, although limited dispersion tuning capabilities remain key challenge. Here, we introduce liquid-core fibers (LCFs) longitudinally controlled of higher-order mode, achieved by axial modulation liquid core diameter. This provides versatile photonic platform unique control that are particularly relevant to ultrafast, non-linear frequency conversion. Our concept uses LCFs anomalous at...

We achieve supercontinuum generation in the visible spectral regime through hollow beams a two-mode photonic crystal fiber (TM-PCF). The TM-PCF is pumped with 532 nm sub-nanosecond pulses and it supports only fundamental second-order modes over entire region. By excitation nonlinear propagation, polychromatic are generated two separate regions, which lead to "white" beam at output. have also identified efficient anti-Stokes conversion deeply normal dispersion as an intermodal phase-matched...

In this work, we demonstrate the optical heating modulation of soliton-based supercontinuum generation through employment multi-walled carbon nanotubes (MW-CNTs) acting as fast and efficient heat generators. By utilizing highly dispersion-sensitive liquid-core fibers in combination with MW-CNTs coated to outer wall fiber, spectral tuning dispersive waves response times below one second via exploiting strong thermo-optic core liquid was achieved. Local illumination fiber at selected points...

On-chip hollow-core waveguides represent a promising platform for microfluidic analysis, nonlinear optics and quantum information processing, due to light guidance directly inside the medium of interest. Recently, we have introduced two types 3D nanoprinted on-chip waveguides, namely cage microgap waveguide which unique properties sensing. Here will present our results water-based spectroscopy, refractive index sensing, nanoparticle tracking, optical fiber interfacing.

Hollow-core waveguides represent a promising type of on-chip waveguide, enabling strong light-matter interactions for guiding light directly in the medium interest. are very established fiber optics, while they receive much less attention photonics. Here, we will show how 3D nanoprinting is used to transfer hollow-core waveguide concepts from optics Two main types nanoprinted discussed, yielding high-power fraction core and lateral access region. We explain applications these gas-...

Abstract Encoding metasurfaces, serving as innovative materials that facilitate the integration of physical and digital realms, offer engineers a more streamlined effective approach to manipulating electromagnetic beams. To optimize functionality it is imperative attain multi-frequency beam control on single metasurface. In this paper, we present implementation reflective encoding metasurface capable independently modulating phase high-frequency low-frequency waves at two disparate...

Ultrafast supercontinuum generation crucially depends on the dispersive properties of underlying waveguide. This strong dependency allows for tailoring nonlinear frequency conversion and is particularly relevant in context waveguides that include geometry-induced resonances. Here, we experimentally uncovered impact relative spectral distance between pump bandgap edge particular wave formation example a liquid strand-based photonic fiber. In contrast to its air-hole-based counterpart, fiber...

The visible supercontinuum (SC) sources has played an important role in biomedical applications. However, the small core size of photonic crystal fiber (PCF) restrict development high power SC by its mode field area. In addition, zero dispersion wavelength (ZDW) PCF with diameter is usually below 1 μm, which far away from 1.06 μm laser most commonly used pump source. As ZDW shifts pump, intensity light decreases correspondingly. We promote a new technique to get enhanced output power,...

In conventional method, capacity configuration of multiple-chiller system is optimized to achieve the required annual EER (energy efficiency ratio) limit according a certain hourly load profile. However, it usually results in that may not be reached because uncertainty profile concerned. To improve tolerance for profile, this paper presents robust method system. The maximum acceptable region defined as range variation configurated can satisfy limit. robustness index area region. A novel...

We report the experimental results of ultraviolet-extended broadband supercontinuum (SC) generation in a carefully designed uniform seven-core photonic crystal fiber (PCF) pumped by Ti:sapphire femtosecond laser at 800 nm. Three different PCFs various core diameters are fabricated to achieve group-velocity matching for ultraviolet components. A wide optical spectrum spanning down 350 nm is obtained, which shortest wavelength SC multicore PCF date. High spectral flatness (10 dB) has been...

Abstract The detection of cell viability or the percentage live and dead cells in a sample is an important parameter. At present, common methods for determination mainly rely on responses to dyes. However, additional need staining will consequently cause time-consuming laborious efforts. Furthermore, by invasive may damage internal structure cells. In this work, we proposed label-free method classify colonic adenocarcinoma 2D light scattering combined with deep learning algorithm....

Satellites are intricate systems that consist of large number interconnected devices. Consequently, it generates tremendous amount telemetry data during its lifetime. If the system information solar array contained in can be used to forecast future state, then malfunction alarm and in-orbit maintenance implemented. At present, research on arrays basically focuses state monitoring outlier detection, almost no fault prediction is involved. In this paper, a data-driven faults method for based...

A remain useful life prediction is presented for two types of failure fiber optic gyroscopes (FOGs), performance degradation and sudden function failure. First, parameters are estimated model established based on telemetry data. Then, the cumulative probability (CFP) obtained, stochastic hybrid automata (SHA) used to analyze competitive process. Finally, a simulation carried out verify feasibility proposed method, reveal influence on-orbit operating environment results.