Optical ridge waveguide. These waveguides have a cross section of 0.

Optical ridge waveguide A ridge waveguide has strong optical confinement because it is surrounded on three sides by low-index air (or cladding material). Using Nov 17, 2019 · Optical waveguides are structures which guide waves (flow of optical energy) in the optical spectrum. The influence of fabrication defects on optical losses and high-order mode suppression including displacement errors in the proposed topology was estimated. Fabricated using micro metal additive manufacturing with copper in a monolithic back-to-back configuration, the transition demonstrates a bandwidth of 50% (105–175 GHz) with an average insertion loss of 0. fsp, which is a simple rib waveguide. A ridge waveguide has a structure that looks like a strip waveguide, but the strip, or the ridge, on top of its planar structure has a high index and is actually the waveguiding core. Semiconductor Optical Amplifiers: 13 2. 8 dB/cm for TM May 7, 2024 · In the work, the planar and ridge waveguides are fabricated by the combination of ion implantation and femtosecond laser ablation in the high-gain Nd3+-doped laser glass. 1 μm (by MODE, Lumerical). Its mode characteristics were analyzed by the end-face coupling method. 0 MeV and the fluence of 5 × 1014 ions/cm2 and the femtosecond laser ablation with a pulse energy of 3. 3 , the tunable laser source provides incident light, which is delivered via a polarization-maintaining fiber (PM Fiber). 018 Corpus ID: 121585807; Optical ridge waveguides in Yb:YAG laser crystal produced by combination of swift carbon ion irradiation and femtosecond laser ablation The optical phase tuner 150 includes a semiconductor optical ridge waveguide section 155 and one or more semiconductor heater strips 160 oriented about parallel to the semiconductor optical ridge waveguide section 155. This is, to the best of our Nov 9, 2021 · To control the polarization of shallow etched ridge waveguide made of crystalline silicon on insulator (SOI), a non-rectangular section SOI waveguide is proposed. 0 MeV and a fluence of 1. These waveguides have a cross section of 0. 0 μJ and a scanning speed of 50. 2 dB/cm for TE and 2. 2 Historical development: 14 2. Rectangular waveguides are used in integrated optical circuits and in laser diodes. The effect of the three-trench structure was investigated theoretically and experimentally Sep 20, 2023 · In this work, the ridge waveguide was formed by the femtosecond laser ablation with a central wavelength of 0. Suppose the propagation is along x, we can use a "x span" of 50 nm or so and a override mesh with dx = 50 nm to have only one cell in x. However, ridge waveguides suffer from scattering losses. (v) We report that low-loss ridge waveguides are directly written on nanoporous silicon layers by using an argon-ion laser at 514 nm up to 100 mW. We report on the fabrication of optical planar and ridge waveguides in the terbium scandium aluminum garnet by using combination of helium ion implantation and precise diamond blade dicing. 8 µm. 1 (a). Bismuth-substituted iron garnet thin films grown by liquid phase epitaxy on gadolinium gallium garnet substrates were used as the starting material to form the waveguides. ization characteristics of SOI ridge waveguide theoretically, the right angle of the ridge waveguide is designed as a non-rectangular shape of arc. Jul 1, 2023 · Fabrication of ridge optical waveguide in thin film lithium niobate by proton exchange and wet etching Opt. 1 Introduction: A variety of different integrated optical waveguides are used to confine and guide light on a chip. Propagation losses of 1. Measurements of these devices delivered high lateral brightness values of $${4}{\\hbox {W}\\cdot \\hbox {mm}^{-1} \\hbox {mrad}^{-1}}$$ 4 W · mm - 1 mrad - 1 at $${2. 3d, has a structure that looks like a strip waveguide, but the strip, or the ridge, on top of its planar structure has a high index and is actually the waveguiding core. The Si layer on $${\\mathrm{SiO}}_{2}$$ SiO Aug 1, 2021 · To realize the single mode transmission of optical waveguide at 1550 nm, the optimized width of straight waveguide was of W wg = 1. Integrated Optical Waveguides 7. Aug 1, 2018 · The advantage of a slot waveguide is the high-field confinement in the slot section, which normally cannot be achieved using a simple strip-or a ridge-based waveguide, making it a potential (iv) The ridge waveguide, Fig. We also investigate a compact double-level taper which adiabatically couples light from these waveguides to silicon strip Sep 12, 2020 · The dielectric ridge waveguide (often termed as rib waveguide) develops a high effective index area immediately under the ridge, over the side slab region []. (A) Optical fiber, (B) Ridge waveguide, (C) Buried waveguide, and (D) Suspended rib waveguide. 6dB for a 90" bend with R = 50pm in SiO, cladded Jul 14, 2022 · The optical pump is coupled into the ‘active waveguide’ from an adjacent channel waveguide, called ‘pump waveguide’; by suitably tailoring the coupling between the two waveguides Fig. A 16-channel 200GHz arrayed-waveguide grating (AWG) (de)-multiplexer is demonstrated experimentally by utilizing Si3N4 buried optical waveguides, which have 50nm-thick Si3N4 cores and a 15μm-thick SiO2 cladding. A Mach–Zehnder interferometer sensor is experimentally demonstrated using the waveguide in its sensing branch, and analytical Sep 20, 2023 · The cross-section morphology of the ridge waveguide was captured by an optical microscope. Magneto optical waveguide. In each configuration guiding of light is achieved by a difference of refractive index (n i) between core and cladding. >2 W at 780 nm output). 5 dB/cm at 1550 nm after oxidation. Oct 25, 2012 · A ridge waveguide has a structure that looks like a strip waveguide, but the strip, or the ridge, on top of its planar structure has a high index and is actually the waveguiding core. 1 (W = 30 μm) and No. A strip waveguide is basically a strip of the layer confined between cladding layers. 1. A ridge waveguide has strong optical confinement because it is surrounded on three sides by low-index air region (or cladding material). 1 (c) and (d) show almost trapezoidal and rectangular cross-sections of the optical waveguide core when the clearance is 500 μm and 400 μm Aug 9, 2024 · Flanking the optical ridge waveguide is a pair of compact interdigitated transducers (IDTs), which enable the device to interface with microwave signals through piezoelectric transduction. Nov 1, 2021 · In this paper, optical ridge waveguides which possess 2D optical confinement are prepared by O 5+ ion irradiation together with precise diamond blade dicing on the surface of a z-cut KTA crystal, and nonlinear frequency conversion (1064 → 532 nm) under different fundamental light polarizations has been realized. 1 Mach–Zehnder Interferometers 195 4. 1 Introduction: 13 2. 8 ¿m. And in order to improve the coupling efficiency, the input end Ridge waveguides provide a large refractive index contrast and thus strong mode confinement, making them highly attractive for building compact photonic integrated circuits. The formation theory Sep 1, 2015 · The optical properties of fabricated optical waveguides were studied by using the prism coupling method (at 632. We demonstrate scattering-loss reduction of ridge waveguides made of lithium-niobate-on-insulator (LNOI) substrates by more than one order of magnitude. 1 (a) and 1(b) are the top view of three channel ridge waveguides in the sample, and the optical waveguides bend significantly when the clearance is 800 μm and 700 μm, respectively. Sep 1, 2015 · We have reported on the fabrication of optical ridge waveguides in Yb:YAG crystal by using swift C 5+ ion irradiation and subsequent femtosecond laser ablation. The characteristics of the eigenmodes in a shallowly-etched SOI ridge optical waveguide are analyzed by using a full-vectorial finite-different method (FV-FDM) mode solver. 3. Jun 14, 2018 · The ridge waveguide, Fig. 5}\\,\\hbox {W}$$ 2. Channel waveguide usually has a sub-micrometer cross-sectional proportion owing to its more significant effective index (\(n_{\text {eff}} \sim 3\)), which thus experiences very high coupling losses []. 274 ± 0. The waveguide has been drawn up in the simulation file nr_waveguide3d. 6 Fiber Bragg Gratings 203 5 Nonlinear Optical Effects in Optical Fibers 209 Jun 12, 1990 · A brief and broad overview and historical perspective of the theory of lightwave propagation in dielectric waveguides is attempted, intended to highlight the principal concepts and theoretical approaches and refer the reader to the literature for detailed derivations and explanations. Due to silica absorption above 3. All the photonic ridge-waveguides were aligned to the y crystallographic axis, as plotted in Fig. 008 dB/cm in the C-band (1530 nm - 1565 nm). 3 µm–1. 4. This is May 8, 2009 · Abstract: Small SU-8 ridge optical waveguides with an air cladding and a SiO 2 buffer on Si substrate have been realized by using a direct ultraviolet (UV) photolithography technology. Experiments at I = 632. Schematic overview dielectric waveguides. The pulse energy and the scanning velocity are 3 μJ and 50 μm/s for the FS laser ablation. 4 Original results in this thesis: 9 2. Tailored waveguides are available based on specific demands. The structure is uniform in the y-direction. e. The light intensity distribution of the ridge waveguide at 976 nm was experimentally measured to validate its effect on two dimensions confinement. 7 dB for 90 degrees bend sections with radii of curvature as small as 75 mu m were measured on silicon-based Al/sub 2/O/sub 3/ ridge waveguides with SiO/sub 2/ cladding layers at a wavelength of 632. 4 Coupling Coefficients for Optical Fibers 183 4. 2 (d), the inset shows the electrical polarization morphology of the ridge waveguide. Lastly, the ridge structure was formed by reactive ion etching (RIE). The specifications of the Feb 15, 2023 · The domain structure of the TPPLNOI waveguide could be observed by scanning electron microscope (SEM) [23], as shown in Fig. The structure with an ultra-thin core layer helps to reduce the scattering due to the sidewall roughness and consequently shows very low loss of about 0. When using this We report on the fabrication and characterization of ridge waveguides in lithium niobate thin films by diamond blade dicing. 8 nm) and the reflectivity calculation method. 1 Waveguide structure and the issue of polarisation dependence 14 Aug 11, 2022 · We report on the fabrication and electro-optical performance of ridge waveguide (RW) lasers emitting near 905 nm based on a vertical layer structure consisting of three single quantum wells (SQWs) as active regions separated by two tunnel junctions (TJs). The m-line A new way to make broadband polarizers on silicon-on-insulator (SOI) waveguides is proposed, analyzed and characterized. 5 Optical Waveguide Devices using Directional Couplers 195 4. Simulation results are discussed and design principles for achieving single-longitudinal-mode operation are outlined. The species, energy, and dose of ion implantation are O3+ ion, 6. OPTLASTEC. 2 Ring Resonators 197 4. First, active laser simulations are performed to reproduce these results Aug 2, 2022 · We report on the fabrication and electro-optical performance of ridge waveguide (RW) lasers emitting near 905 nm based on a vertical layer structure consisting of three single quantum wells (SQWs Anisotropic waveguide. In this work, the proposed modulator consists of graphene, Molybdenum disulfide ( $${\\mathrm{MoS}}_{2}$$ MoS 2 ), and Hexagonal Boron Nitride (h-BN) layers with Si layer on $${\\mathrm{SiO}}_{2}$$ SiO 2 substrate. 8 nm show an excess loss of 0. Plasma etching processes were used for the ridge waveguide fabrication on different material substrates. The influences of geometric parameters, chemical potential, BP orientation and dispersion on the fundamental mode of this modulator were determined in detail by the finite-difference time-domain (FDTD) method. The schematic of the coordinate axes was also inserted, the intersection point was Jul 17, 2024 · The transition incorporates metal ridge steps as impedance transformers, resulting in a compact total size of 3. The most basic optical waveguide is a slab waveguides shown below. The transmittivity formulas of TE0 and TM0 in the proposed waveguide are deduced, and the finite difference time domain method is used for analysis. The fundamental mode with the Sep 1, 2015 · DOI: 10. lowest M2-values over the measured current range. 8dB/m. The lithium niobate thin films with a thickness of 1 µm were fabricated by bonding a He-implanted lithium niobate wafer to a SiO2-coated lithium niobate wafer and crystal ion slicing. Fig. 4. Mater. 6 μm, the conventional silicon-on-insulator platform, used in the near infrared (NIR) wavelength range, is not adapted for MIR broadband silicon photonic Nov 1, 2021 · Terbium scandium aluminum garnet crystal is a promising material which has excellent characteristics for magneto-optical devices. The mechanism of the ion‐implanted waveguide was discussed by the Stopping and Aug 24, 2024 · In this work, the planar and ridge waveguides on the Er3+-doped germanate glass were fabricated by the oxygen-ion implantation with the energy of 6. 1016/J. , 120 ( 2021 ) , Article 111433 View PDF View article View in Scopus Google Scholar Aug 1, 2024 · The optical transmission loss of the Si ridge straight waveguide was measured utilizing the Fabry-Perot method [21]. Feb 6, 2023 · In this study, the technology for producing ridge waveguides with a minimal roughness of the sidewalls and material surface in a near-waveguide region was developed with the purpose of fabricating miniature photonic integrated circuits on a LiNbO3 substrate. 4~0. WAVEGUIDE LOSSES IN NEW OPTICAL 'DOUBLE-RIDGE' Indexing terms: Waveguides, Optical waveguides, Optoelec- tronics, Integrated optics A new type of waveguide is proposed combining a low and a high ridge. The semiconductor optical ridge waveguide section 155 is the lateral guiding portion of the optical ridge waveguide 135. Oct 1, 2021 · (a1) Normalized transmission of quasi-TM polarized light in the 2-mm-long ridge waveguide fabricated by PEWE method, (a2)~(a4) Near-field pattern and intensity profiles of straight waveguide using an 850 nm laser as the light source, (b1)~(b2) Near-field pattern and intensity profiles of Cosine-shaped Y-branch optical waveguide of 850 nm Jan 1, 2016 · Optical ridge waveguides in Er 3+ /Yb 3+ co-doped phosphate glass produced by ion irradiation combined with femtosecond laser ablation for guided-wave green and red upconversion emissions Author links open overlay panel Chen Chen a , Ruiyun He a , Yang Tan a , Biao Wang b , Shavkat Akhmadaliev c , Shengqiang Zhou c , Javier R. 0 μm/s. 8 nm. Based on measurements of the optical output power, central emission wavelength, and spectral emission width, the different diode laser types are compared while . 1 Dielectric Slab Waveguides 7. 2015. In this paper, we designed GaInP–AlGaInP laser diodes (LD) with a 650 nm range and a trench mode-modulation structure based on the structure of edge-emitting laser (EEL) diodes. 0 × 106 eV, and 5. A dielectric optical waveguide comprises a longitudinally extended high-index medium called the Core, which is transversely surrounded by a low-index medium, called the Cladding. 0 × 1014 ions/cm2, respectively. 2 (W = 50 μm), in which the ridge outlines can be seen clearly Nov 1, 2023 · The planar and ridge optical waveguides with a 1D and 2D configuration were prepared by the hydrogen-ion implantation with an energy of 400 keV and a dose of 6 × 10 16 ion/cm 2 and the femtosecond laser ablation with the pulse energy of 3 μJ and the scanning speed of 50 μm/s in the Er 3+-doped germanate glass. 25 µm by 2 µm and are fabricated by standard photolithography and dry etching. 53 mm × 1. 1 Laterally corrugated ridge-waveguide structure: a general view, b wide-ridge section, c narrow-ridge section, and d transverse section with average refractive index regions (avg. 1 (a) and (b) shows the configuration of the cosine-shaped Y-branch optical waveguide and the straight optical waveguide used in this paper. The effects of the laterally-corrugated ridge geometry both on the coupling coefficient and on the Bragg wavelength of different transverse Mar 12, 2023 · Traditional laser diodes operating at 650 nm are more prone to high-order mode excitation, resulting in poorer beam quality. Apr 22, 2009 · The paper presents some model improvements for the optical simulation of laterally-corrugated ridge-waveguide distributed feedback lasers. 1 dB/cm. 1. 4: Beam quality factor M2 for ridge-waveguide lasers with varying ridge width. 03. Feb 6, 2023 · In this study, the technology for producing ridge waveguides with a minimal roughness of the sidewalls and material surface in a near-waveguide region was developed with the purpose of fabricating In this paper, an optical modulator based on monolayer graphene and triple-layer black phosphorus (BP) heterojunction in the optical communication band range is designed. Aug 1, 2017 · Figure 1(b) and (c) demonstrate the optical microscope images of the cross-sectional of ridge waveguides No. A guided optical wave propagates in The implementation of a Mid-InfraRed (MIR) silicon photonics transducer with broad transparency (up to 8 μm) is a challenge that could find applications in spectroscopic sensing and environmental monitoring. 5 W optical output power. 3 Structures and materials: state of the art: 14 2. ) in the areas of the grating 123 One is a proton-exchanged waveguide (up to 50 mm long) and the other one is ridge waveguide for high power handling (i. Jan 1, 2013 · One of the earliest demonstrators was based on the simple structure with a board-mounted edge-emitting laser diode was butt-coupled to an optical ridge waveguide on top of the board, and the output from the waveguide was deflected towards the active surface of the photodiode with a laser-ablated mirror surface. The influence of the gap Bending losses lower than 0. Nov 1, 2021 · Terbium scandium aluminum garnet crystal is a promising material which has excellent characteristics for magneto-optical devices. In our design, top width W of the cosine-shaped Y-branch waveguide and straight waveguide is set to be 3 μm and 800 nm, respectively. The propagation loss measured by the cut-back method is about 0. 808 μm and a speed of 50 μm/s on the planar Nd3+‐doped fluorophosphate glass waveguide that was fabricated by the C3+ ion implantation with an energy of 6. Oct 15, 2024 · Fig. Slab optical waveguides were produced using mechanical Oct 13, 2023 · An approach for filtering the fundamental mode in an integrated optical modulator with multimode waveguides based on etched thin lithium niobate nanofilms is presented. The broader lasers are initially better, but at higher currents, the lasers become multi mode and the beam quality degrades rapidly. The ridge Nd 3+-doped fluorophosphate glass waveguides have potential as fundamental structures for many optoelectronic devices including waveguide amplifiers and lasers. 1 dB/mm (@1550 nm) when the core width is 2. The single waveguide core is designed in such a way that the third vertical mode is lasing. FDTD Simulation approach. The simplest case is a rectangular waveguide, which is formed when the guiding layer of the slab waveguide is restricted in both transverse directions rather than just one. 5 Coupling Coefficients for Corrugated Waveguides 187 4. 5. It is shown that metal electrodes can be used as a modal filter to suppress high-order modes in wide multimode ridge waveguides and, consequently, to provide their quasi-single-mode regime of operation. 95 mm × 1 mm. The waveguides were characterized by the m-line setup and the near-field pattern. The experimental setup is depicted in Fig. 0×1012 C3+s/mm2. A ridge waveguide has strong optical confinement because it is surrounded on three sides by low-index air region (or cladding material). Optical waveguides can be classified according to their geometry, mode structure, refractive index (RI) distribution, and material. These can be broadly categorized into planar and non-planar waveguides; non-planar waveguides can be further classified according to geometry, mode structure, Oct 1, 2021 · Fig. Jul 12, 2022 · The fabrication and isolation characteristics of bias-magnet-free optical isolating waveguides with optimal wavelength operations of 780 nm are outlined in this report. 2 The role of semiconductor optical amplifiers in optical communications 3 1. Vázquez de We demonstrate low loss shallow-ridge silicon waveguides with an average propagation loss of 0. These values, which are close to the calculated values, are the lowest thus far reported Feb 1, 2023 · In this work, a simulation-based analysis of a CW-driven tapered ridge-waveguide laser design is presented. It is found that the transmittivity of TE0 and TM0 modes shows great deviation in Jan 12, 2021 · The HCG waveguide is excited by coupling from a ridge waveguide with the same dimensions as the HCG waveguide having an eigenmode propagating in the waveguide direction, launching a pulse with a In this work, the influence of strong optical feedback on the emission behavior of distributed Bragg-reflector ridge waveguide diode lasers emitting at 1120 nm with different cavity lengths and facet reflectivities is investigated. b, Oct 13, 2021 · In our work, we first time constructed ridge waveguide on BaF 2 crystal by using the method of ion irradiation with femtosecond laser ablation and investigated optical transmission characteristics of waveguides at mid-infrared 4 µm wavelength and the lattice damage of crystal after ion irradiation by using Raman spectrum. The transmittivity formulas of TE0 and TM0 in waveguides are derived, and the polarization independence of TM0 mode and TE0 mode in non-rectangular SOI waveguides is analyzed by finite difference Apr 19, 2021 · In this paper, an optical modulator based on the hybrid structure is designed and analyzed in the wavelength range of 1. The theoretical calculation shows that the loss of TE fundamental mode could be made very low while at for a ridge-waveguide laser with 4 m wide ridge. 3 Bistable Devices 200 4. 3 Outline: 8 1. The minimum propagation loss of the ridge waveguides was measured to be ~2. 2 (a) shows the structure of the TPPLNOI ridge optical The dependence of losses induced in the optical modes of an etched ridge TFLN waveguide on the size of the interelectrode gap was calculated and analyzed for different waveguide ridge widths. Optical characterization of the waveguides indicates light propagation loss lower than 0. tbdvjz ekg tfv sejvj kwrfurxca sxsyjra wrj npqc mprx edzpb