Abstract Rare‐earth (RE) ion doped crystalline materials have a wide spectrum of applications in lasers, amplifiers, sensors, as well classical and quantum information processing. The incorporation RE ions into integrated photonics holds great promise for enriching the designer's toolbox with view to addressing key performance features not available existing photonic integration platforms. RE‐ion‐doped thin‐film LiNbO 3 (also called lithium‐niobate‐on‐insulator, RE:LNOI), which inherits...

Background: Exploring the impact of combining Industry 4.0 technologies and Lean Manufacturing tools on organizational performance has been a popular topic in recent years. Design/Methodology/Approach: We propose novel Smart Sustainable System (SSMS) to provide management insights related social impact, economic performance, environmental impact. Some called Dynamic tools, such as Value Steam Mapping (VSM), Extended Single Minute Exchange Die (SMED), Digital Poka-Yoke, are presented outputs...

Abstract The microcavity is a promising sensor platform, but any perturbation will disturb its linewidth, cause resonance shift or splitting. However, such sensing resolution limited by the cavity's optical quality factor and mode volume. Here, an on‐chip integrated system proposed demonstrated that of self‐referenced can be enhanced with multi‐mode coupling. In experiments, inter‐mode coupling strength carefully optimized pulley waveguide observed improvement nearly 3 times in frequency...

We present a detailed characterization of photorefraction in on-chip high-Q lithium niobate (LN) microresonators. show that the photorefractive effect these devices exhibits very distinctive temporal relaxation dynamics compared with those bulk crystals and mm-sized LN resonators. The is dominated by fast time response constant as small 20.85 ms more than three-orders magnitude faster observed macroscopic devices. great potential convenient energy-efficient approach for all-optical functionalities.

Whispering-gallery-mode microresonators, one of the most important components photonic integrated circuits, have ability to dramatically boost light–matter interactions. In this Letter, we demonstrate effective sum-frequency generation via modal phase matching in a triply resonant lithium-niobate-on-insulator microdisk resonator through two individual continuous wave pumps working communication band. The conversion efficiency is measured be <mml:math...

The erbium-doped lithium niobate on insulator (LNOI) laser plays an important role in the complete photonic integrated circuits (PICs). Here, we demonstrate tunable whispering gallery single-mode (WGSML) by making use of a coupled microdisk and microring LNOI. A 974 nm pump light can have excellent resonance designed microdisk, which is beneficial to mode (WGM) generation. WGSML at 1560.40 with maximum 31.4 dB side suppression ratio (SMSR) has been achieved. By regulating temperature, output...

Abstract. Peroxyacetyl nitrate (PAN) acting as a typical indicator of photochemical pollution can redistribute NOx and modulate O3 production. Coupled with the observation-based model (OBM) generalized additive (GAM), intensive observation campaigns were conducted to reveal characteristics PAN its impact on O3, contributions influencing factors formation also quantified in this paper. The F values GAM results reflecting importance showed that ultraviolet radiation (UV; value = 60.64), Ox (Ox...

A light source is an indispensable component in on-chip systems. Compared with hybrid or heterogeneous integrated laser, monolithically laser more suitable for high-density photonic circuits because of the capability large-scale manufacturing, lower active-passive coupling loss, and less test complexity. Recent years have seen spark research on rare-earth ion-doped thin film lithium niobate, demonstrations been made both classical quantum chips. However, low output power limited emitting...

On-chip efficient nonlinear functions are instrumental in escalating the utilities and performance of photonic integrated circuits, especially for a wide range classical quantum applications, such as tunable coherent radiation, optical frequency conversion, spectroscopy, science, etc. Here, we fabricated $Z$-cut lithium tantalate on insulator (LTOI) microdisk with high quality ($Q\ensuremath{\sim}{10}^{6}$) factors. Cascaded three- four-wave mixing generation simultaneously were achieved...

Lithium niobate is a material that exhibits outstanding electro-optic, nonlinear optical, acousto-optic, piezoelectric, photorefractive, and pyroelectric properties. A thin-film lithium photonic crystal can confine light in the sub-wavelength scale, which beneficial to integration of on-chip device. The commercialization on insulator gives birth emergence high-quality crystals. In order provide guidance research devices, recent progress about fabrication, characterization, applications...

Abstract Orbital angular momentum (OAM), due to its theoretically orthogonal and unbounded helical phase index, is utilized as an independent physical degree of freedom for ultrahigh‐capacity information encryption. However, the imaging distance OAM hologram typically inflexible determined by focal length Fourier transform lens placed behind hologram. Here, 3D orbital holography proposed implemented. The between holographic plane performed superimposing Fresnel zone plates (FZP) onto...

Thin film lithium niobate (TFLN) has emerged as a promising platform for modern complete photonic integrated circuits due to its exceptional optical properties. The development of rare-earth-ion-doped TFLN led significant advancements in on-chip microlasers. However, challenges persist developing energy-efficient, low-threshold lasers on TFLN. In this letter, we report heterostructure crystal (PhC) nanobeam cavity with Purcell factor (∼2.4 × 104 μm-3) and β (∼0.23) both enhanced by 2 orders...

A kind of tunable magnetic fluid grating is developed in this letter. The operating principle the analyzed theoretically. When absorption coefficient modulation not too large, energy zeroth-order diffracted light can be transferred to that higher-order completely and vice versa. Experiments are done investigate diffraction properties grating, transfer apparent.

A kind of fiber-optic modulation-depth-tunable modulator is developed in this paper. In modulator, a magnetic fluid used as the cladding drawn fiber, which attenuates evanescent field when light guided fiber. Because attenuation depends on strength applied external field, emergent intensity from fiber modulated with change strength. The response times, i.e., span for to reach final steady value time turned or off, are evaluated quantitatively.

We demonstrate the first, to best of our knowledge, type-0 broadband sum-frequency generation (SFG) based on single-crystal periodically poled LiNbO3 (PPLN) thin film. The broad bandwidth property was largely tuned from mid-infrared region telecommunications band by engineering thickness PPLN bulk crystal nanoscale. It provides SFG a solution with both and high efficiency using highest nonlinear coefficient d33 instead d31 in type-I or second-harmonic generation. measured 3 dB upconversion...

In this paper, an improved three-dimensional two-temperature model for multi-pulse femtosecond laser ablation of aluminum was proposed and proved in our experiment. Aiming to achieve hole-drilling with a high ratio depth/entrance diameter vacuum, can predict the depth radius drilled holes precisely when employing different parameters. Additionally, ablation, we found that fluence number pulses are dominant parameters threshold is much lower than single-pulse one, which will help obtain...

Self-referenced temperature sensing based on thermo-optic birefringence is demonstrated a Z-cut lithium niobate microdisk resonator. Due to the significant difference between coefficients of ordinary and extraordinary light, quasi-transverse magnetic (quasi-TM) electric (quasi-TE) modes in show relative cavity resonance shift upon change, which acts as robust self-reference for sensing. A sensitivity 0.834 GHz/K measurement uncertainty 0.8 mK are with an optical input power only 1.5 μW.

We demonstrate flexible nonlinear frequency up-conversion in high-Q lithium niobate photonic crystal nanobeam resonators. The high optical Q together with strong mode confinement allows us to observe clear second harmonic generation and sum an power around only tens of microWatts. These demonstrations show that nanoresonators are great promise for applications.