Contaminated fresh produce remains a prominent catalyst for food-borne illnesses, prompting the need swift and precise pathogen detection to mitigate health risks. This paper introduces an innovative strategy identifying pathogens in samples from local markets grocery stores, utilizing optical sensing machine learning. The core of our approach is photonics-based sensor system, which instantaneously generates signals detect presence. Machine learning algorithms process copious data predict...

Aluminum-reinforced silicon carbide composite (Al/SiC) has gained popularity as a metal matrix for various applications in aerospace, automotive, defense, and other fields due to its high specific strength, lightweight, wear-resistant characteristics. Due their excellent material properties, drilling precise holes especially thick Al/SiC composites is difficult task. The present research aims laser beam percussion of with better accuracy by reducing the hole taper, non-circularity, spatter...

Dynamic light scattering from orientational order fluctuations in a liquid crystalline tetrapode reveals successive, weakly first-order isotropic to uniaxial and biaxial nematic phase transitions. The parameter relaxation rates exhibit temperature dependences consistent with Landau-de Gennes mean field theory. Combined previous evidence of second-order uniaxial-biaxial transition closely related tetrapode, the present study supports existence nematic-nematic tricritical point thermotropic crystals.

Magnetic birefringence and dynamic light scattering measurements of orientational order parameter fluctuations at the isotropic-nematic phase transition a bent-core liquid crystal reveal pretransitional temperature dependence consistent with standard Landau--deGennes mean field theory. However, as follows: in compound is more weakly first $({T}_{NI}\ensuremath{-}{T}^{*}\ensuremath{\approx}0.4\phantom{\rule{0.2em}{0ex}}\ifmmode^\circ\else\textdegree\fi{}\mathrm{C})$, leading Landau...

We report, for what we believe is the first time, generation of stable chair-like pulses (a pulse shape with an initial long flat portion followed by a short high peak power resembling chair) mode locking Ytterbium (Yb)-doped fiber laser. Chair-like shapes are achieved implementing dual saturable absorbers, one based on nonlinear optical loop mirror (NOLM) and other polarization rotation (NPR) inside cavity. The transmission characteristics NOLM-NPR pair leading to formation numerically...

The design and fabrication of gate/source connected multi-finger field plate structures using TCAD ATLAS simulation software is presented. designed are fabricated on indigenous AlGaN/GaN HEMT devices. devices with exhibit about three times improvement in breakdown voltage device close agreement the results. Integration plates have resulted higher VDS (drain to source voltage) operation output power Incorporation also decrease reverse leakage current

An experimental study of the heat capacity, mass density, magnetic-field-induced optical birefringence, linewidth and intensity scattered light, viscosities associated with nematic order parameter fluctuations fluid flow has been performed on an achiral bent-core liquid crystal above its clearing point temperature. The measurements reveal a transition between two optically isotropic phases that is consistent recent theoretical predictions "tetrahedratic" form orientational order.

By exploiting the saturable nature of re-absorption loss under quasi-three-level laser transition self Q-switching operation in Nd:YVO(4) at 914 nm is demonstrated. The stable self-pulsing was observed with crystal doping concentration 0.3 at.%. At an incident pump power 30 W around 600 mW average obtained. Individual pulse energy and FWHM duration were experimentally measured to be 10 μJ 460 ns, respectively. performance analyzed help a rate equation model. simulation results show good...

Highly efficient and high-power continuous-wave (CW) green beam generation by intracavity frequency doubling of diode side-pumped Nd:YAG laser using a water cooled high gray track resistant potassium titanyl phosphate crystal is demonstrated in Z-shaped resonator design ensuring stability over the entire range pump power with optimized spot sizes at respective components configuration. A maximum 82.5 W CW was obtained total pumping 750 W, corresponding to 11% conversion efficiency. The...

Tumors can cause severe problem to human beings. Sometime it be a of death. Earlier there were lack treatment and technological deficiency, due which was unable detect tumor cells even offer proper for these diseases. This study aims use Photonic crystal (PhC) their ample choice structures litheness endure with every sphere influence has been utilized them twenty decade back now day have extremely huge prospects in imminent future also. They revealed incidence the field imaging, sensing,...

Photonics and artificial intelligence (AI) are two rapidly advancing fields that have the potential to revolutionize various technological domains. This paper explores convergence of photonics AI, focusing on integration for AI applications utilization techniques technology. Paper materials used in systems, highlighting their unique characteristics advantages. Additionally, examine how methodologies such as machine learning neural networks applied optimizing enhancing sensitivity performance...

Asymmetrical growth and dissolution along the polar axis of α-resorcinol crystals from aqueous solution is an important unresolved problem to date. Here we have computationally investigated role interfacial structure which occurs due ordering solvent molecules at crystal surface external factors on uneven opposite hemihedral faces crystals. Periodic dispersion corrected density functional theory has been employed compute various energetics responsible for dissolution. Our results show that...

A multimode interference filter with narrow transmission bandwidth and large self-imaging wavelength interval is constructed implemented in an ytterbium doped fiber laser all-fiber format for broad tunability as well spectral width of the output beam. The peak was tuned help a standard in-fiber polarization controller. With this simple mechanism more than 30 nm (1038 nm–1070 nm) tuning range demonstrated. beam from measured to be 0.05 nm.

The effect of seed orientation on the growth rate and aspect ratio LAP crystals was studied using four different orientations, namely (100), (010), (001) (011), with aim achieving isometric morphology required for device applications. For each experiment rates along principal crystallographic axes crystal were quantified. It found that highest b-axis all orientations investigated followed trend Rb > Rc Ra, which is explained basis low bond strength between (100) cleavage planes relative step...

A methodology to increase the device purpose yield of a KDP crystal is reported in this paper. The method based on increasing cross-section prismatic sector {100} growing at expense unusable pyramidal cap portion by restricting growth up particular height, decided solution–air interface crystallizer. Due lack solution above interface, ceases grow upward direction whereas it continues laterally. This leads an usable volume grown for fabrication elements required electro-optic switching and...

We have developed an efficient and high power repetitively Q-switched diode-pumped intracavity frequency doubled Nd:YAG/LiB(3)O(5) based green laser capable of generating 124 W average with 50 ns pulse duration in a highly compact robust linear cavity configuration. The pump to beam conversion efficiency is 16.8% the overall wall-plug 8.3%. long term stability excellent +/-0.4 variation at maximum output +/-2% amplitude fluctuation +/-2.9 timing jitter. M(2) parameter was measured be...