Abstract: An on-chip integrated wavelength division multiplexer, including a bus waveguide and at least two cascaded wavelength division multiplexing units disposed on the bus waveguide. Each of the wavelength division multiplexing units comprises two input ports and one output port, and is used for combining two optical signals received by the two input ports and outputting the combined optical signal from the output port, so as to implement multiplexing of incident optical signals of different wavelengths. By means of the structure in which the at least two wavelength division multiplexing units are cascaded, a relatively wide and flat-top passband can be provided for the on-chip integrated wavelength division multiplexer.

Abstract: A wavelength division multiplexer/demultiplexer, a photonic integrated chip, and an optical module are provided. The wavelength division multiplexer/demultiplexer includes a substrate, a bus waveguide provided on the substrate, and at least two wavelength division multiplexing/demultiplexing units provided on the bus waveguide. Each of the at least two wavelength division multiplexing/demultiplexing units includes a mode multiplexer and an asymmetric Bragg grating. The mode multiplexer includes a first port, a second port, and a third port. The third port is connected to the asymmetric Bragg grating, so as to input a light in a TE1 mode or a higher-order mode to the asymmetric Bragg grating. The asymmetric Bragg grating transmits light containing wavelengths other than a wavelength ?i. A grating period of the asymmetric Bragg grating and the wavelength ?i satisfy a resonance condition.

Abstract: The invention introduces a system for acquiring data on poultry body size, utilizing a baseplate for immobilization. After positioning the poultry, the system adjusts a fixing device on a rod to secure the poultry's knee joints using a fixing clip, thereby stabilizing the poultry's body. A 3D laser scanning lens then conducts comprehensive 3D scanning of the poultry's entire body, transmitting the data to a 3D microcomputer which generates an optimal dynamic model image. This microcomputer organizes and analyzes data from the model using a computer algorithm, ultimately displaying the poultry's body size indices on the 3D microcomputer's display. This method circumvents inaccuracies common with traditional tools like electronic scales, enhancing the speed and precision of poultry body composition data collection.

Abstract: A hybrid package chip and an optical transmitter includes a first sub-chip including a first waveguide and at least one first electrode, and a second sub-chip including a second waveguide and at least one second electrode. The first waveguide is optically coupled to the second waveguide. A first electrode of the first sub-chip and a corresponding second electrode of the second sub-chip are electrically connected to one another by means of a first conductive structure, so as to receive a modulation electrical signal. The first sub-chip is configured to receive external input light and output the light by means of the first waveguide. The at least one first electrode modulates the input light so as to output the modulated light. The second waveguide receives a portion of light from the first sub-chip through coupling.

Abstract: An optical receiving assembly and an optical module. The optical receiving assembly includes a free-space wavelength division demultiplexer having a multiplexed signal input port and at least two multiplexed signal output ports, so that when the multiplexed signal input port receives an optical signal having a plurality of adjacent wavebands, at least one of the multiplexed signal output ports outputs an optical signal having nonadjacent wavebands; and a photonic integrated chip on which a wavelength division demultiplexer is integrated. The optical signal outputted from the at least one of the multiplexed signal output ports is divided by the wavelength division demultiplexer integrated in the photonic integrated chip into optical signals each having a particular waveband.

Abstract: The invention discloses biomarkers associated with residual feed intake of growing chickens in growing period and application thereof, which belongs to the field of poultry breeding technology. These biomarkers include one or multiple components of 13(S)-HOTrE, 20-carboxy-LTB4, Traumatic acid, 15-deoxy-delta-12,14-PGJ2, LysoPC(20:2(11Z,14Z)), phosphorycholine, Sphingosine, malic acid, D-4?-Phosphopantothenate, and Spermidine. The invented biomarkers can realize the identification of the residual feed intake, which has high sensitivity and specificity, and is expected to become a new method for the identification of the residual feed intake.

Abstract: A preparation method for an electro-optic modulator includes: providing a base substrate, and forming a waveguide and bottom electrodes on an upper surface of the base substrate; forming a covering dielectric layer and metal electrodes; forming a supporting substrate on an upper surface of the covering dielectric layer; removing the base substrate; providing a lithium niobate thin film, and bonding the lithium niobate thin film to a surface of the covering dielectric layer remote from the supporting substrate, the lithium niobate thin film being located directly below the waveguide.

Abstract: The present application specifically relates to an electro-optic modulator, comprising: a substrate; a first dielectric layer, located on the substrate; an opening being formed in the first dielectric layer, and the opening exposing a portion of the substrate; a waveguide, located on the substrate and located at the bottom of the opening or below the opening; a first electrode, located in the first dielectric layer, located on one side of the waveguide, and spaced apart from the waveguide; a second electrode, located in the first dielectric layer, located on the side of the waveguide distant from the first electrode, and spaced apart from the waveguide; and an organic electro-optic material layer, at least located in the opening and at least covering the waveguide.

Abstract: A hybrid integrated optoelectronic chip including an optoelectronic chip and a silicon photonic chip, a material of the optoelectronic chip being different from a material of the silicon photonic chip. The optoelectronic chip includes at least one first waveguide. The silicon photonic chip includes at least one second waveguide and an installation recess. The optoelectronic chip is installed in the installation recess, and the first waveguide is optically connected to the second waveguide.

Abstract: A traveling wave electrode modulator and a photonic integrated chip including the same. The traveling wave electrode modulator comprises a silicon base, an optical waveguide and a doped transitional area disposed in the silicon base, and a traveling wave electrode structure electrically connected to the transitional area. The traveling wave electrode structure comprises at least one layer of a continuous electrode continuously extending along the direction of extension of the optical waveguide, at least one layer of a periodic electrode periodically disposed along the direction of extension of the optical waveguide, and a conductive structure. The continuous electrode is electrically connected to the periodic electrode via the conductive structure, and the traveling wave electrode structure is electrically connected to the transitional area via the conductive structure.

Abstract: Provided are a silicon-based tunable filter, laser and an optical module. The tunable laser comprises a semiconductor optical amplifier and a silicon photonic integrated chip, wherein a first coupler, a phase regulator and a tunable filter are provided on the silicon photonic integrated chip; the tunable filter comprises a flat-top band-pass filter structure, a Mach-Zehnder interferometry (MZI) structure and a micro ring resonation (MRR) structure, which are cascaded; gain light emitted by the semiconductor optical amplifier is coupled to the silicon photonic integrated chip by means of the first coupler, and a narrowband filtered optical signal is output by means of the tunable filter; and the phase of the gain light is regulated by means of the phase regulator so as to output single-peak narrowband laser light with a tunable target wavelength.

Abstract: A wavelength division multiplexer/demultiplexer, a photonic integrated chip, and an optical module are provided. The wavelength division multiplexer/demultiplexer includes a substrate, a bus waveguide provided on the substrate, and at least two wavelength division multiplexing/demultiplexing units provided on the bus waveguide. Each of the at least two wavelength division multiplexing/demultiplexing units includes a mode multiplexer and an asymmetric Bragg grating. The mode multiplexer includes a first port, a second port, and a third port. The third port is connected to the asymmetric Bragg grating, so as to input a light in a TE1 mode or a higher-order mode to the asymmetric Bragg grating. The asymmetric Bragg grating transmits light containing wavelengths other than a wavelength ?i. A grating period of the asymmetric Bragg grating and the wavelength ?i satisfy a resonance condition.

Abstract: Methods and systems are provided for assembly of coin components. Two or more coin components are received in an assembly station having at least two assembling members. The assembling members may be configured to form a chamber comprising the cavities and at least one assembling member may be movable over an assembling path. A merging force may be applied for assembling the coin components together to allow continuous production of joined coin components such that when the movable assembling member travels along the assembling path, one coin component locates within the other, thereby forming a coin assembly over a non-zero distance.

Abstract: An electro-optic modulator includes a base plate, an optical waveguide, at least one set of modulation electrodes, and an electromagnetic shielding structure. The electromagnetic shielding structure includes a top shielding member covering the set of modulation electrodes from above, and a side shielding member disposed on two sides of the set of modulation electrodes. At least a portion of the side shielding member extends into the base plate to isolate the set of modulation electrodes.

Abstract: A silicon-based electro-optic modulator includes a substrate layer, an insulation layer, and an optical waveguide layer stacked sequentially, traveling wave electrodes disposed above the optical waveguide layer, and a metal grating structure periodically configured along the direction in which an electrical signal propagates in the traveling wave electrodes. The metal grating structure is disposed above the optical waveguide layer.

Abstract: A waveguide photoelectric detector, comprising: a substrate comprising a silicon layer, the silicon layer having a silicon waveguide formed thereon; an active layer dispose on the silicon waveguide, the active layer having a first doped region formed thereon; a horizontal PIN junction formed at an area of the silicon layer below the active layer, the horizontal PIN junction comprising a second doped region, an intrinsic region, and a third doped region. A doping type of the second doped region is the same as that of the first doped region. One end of the second doped region near the intrinsic region is connected to the first doped region. The third doped region and the first doped region form a vertical PIN junction.

Abstract: A composite coin, coin blank, medal or token structure provides an inner stack, an outer ring surrounding the inner stack, and a separator, an authentication method and method of manufacture for the same. The inner stack comprises one or more inserts stacked on top of each other. The separator is disposed between the outer ring and the inner stack separating the outer ring from the inner stack and separating the plurality of inserts from each other.

Abstract: A hybrid integrated optoelectronic chip including an optoelectronic chip and a silicon photonic chip, a material of the optoelectronic chip being different from a material of the silicon photonic chip. The optoelectronic chip includes at least one first waveguide. The silicon photonic chip includes at least one second waveguide and an installation recess. The optoelectronic chip is installed in the installation recess, and the first waveguide is optically connected to the second waveguide.

Abstract: A waveguide photoelectric detector, comprising: a substrate comprising a silicon layer, the silicon layer having a silicon waveguide formed thereon; an active layer dispose on the silicon waveguide, the active layer having a first doped region formed thereon; a horizontal PIN junction formed at an area of the silicon layer below the active layer, the horizontal PIN junction comprising a second doped region, an intrinsic region, and a third doped region. A doping type of the second doped region is the same as that of the first doped region. One end of the second doped region near the intrinsic region is connected to the first doped region. The third doped region and the first doped region form a vertical PIN junction.

Abstract: An electro-optic modulator includes a doped structure disposed on a top silicon layer of a substrate. The doped structure includes an optical waveguide, and a first P-type doped region and a first N-type doped region disposed respectively on two sides of the optical waveguide. The first P-type doped region is connected to the optical waveguide by means of a plurality of P-type doped link arms, and the first N-type doped region is connected to the optical waveguide by means of a plurality of N-type doped link arms. End portions of the plurality of P-type doped link arms and end portions of the plurality of N-type doped link arms are alternately arranged along a direction of light propagation to form PN junction depletion layers. The PN junction depletion layers are periodically arranged along the direction of light propagation to form the optical waveguide.