26 results about "Planar optical waveguide" patented technology

The application discloses a modulation-insensitive dual-mode waveguide optical switch and a preparation method thereof, and belongs to the technical field of planar optical waveguide devices. The switch is composed of a silicon wafer substrate, a polymer lower cladding layer, a polymer optical waveguide core layer and a polymer upper cladding layer from bottom to top, the polymer optical waveguide core layer is covered in the polymer upper cladding layer, and the refractive index of the polymer optical waveguide core layer is higher than that of the polymer upper cladding layer and the polymer lower cladding layer. The application utilizes the advantages of simple asymmetric directional coupling structure and asymmetric Y branch structure and the large thermal-optical coefficient of organic polymer materials, and realizes the modulation-insensitive switch of two signal optical modes through mode conversion by using the asymmetric Y branch when the heating electrode is modulated. The preparation process of the application is simple, only needs spin coating, photoetching and wet etching, effectively reduces the production cost, improves the production efficiency of the device, is favorable for large-scale batch production, and enables the mode signal optical switch to be applied to actual use.

The invention provides a tunable external cavity laser chip and a preparation method thereof, and relates to the technical field of lasers, the chip comprises a planar optical waveguide loop and a gain chip; a narrow-band transmission peak of a micro-ring resonator and an interference passband of a multi-channel interference module are preliminarily aligned through a phase shifter array and a first micro-ring phase shifter in a planar optical waveguide loop, and selection of a lasing working point is completed; and the common phase shifter and the second micro-ring phase shifter are used for cooperative driving, laser frequency sweeping is carried out on the basis of preliminary alignment, and accurate alignment of a narrow-band transmission peak and an external cavity longitudinal mode is maintained in the whole frequency sweeping process. Through cooperative driving of the common phase shifter and the micro-ring phase shifter, the sweep frequency bandwidth of the laser is increased, and frequent mode hopping of output laser in the tuning process is avoided; meanwhile, the periodic alignment reflection phenomenon in a reflection spectrum is avoided, the utilization rate of the gain interval of the semiconductor gain chip is greatly improved, and a larger tuning range is obtained under the condition that the quality of light beams is kept unchanged.

The application discloses a flexible planar light waveguide device and a preparation method thereof, and relates to the technical field of optoelectronic materials and devices. Technical points are as follows: the device provided by the application comprises a flexible substrate, a core layer and an upper cladding layer, and the core layer is a CuI film; a waveguide topological structure for optical signal transmission is formed on the substrate; the CuI film has a cubic zinc blende crystal structure; the average absorption rate of the CuI film in a 0.4-30 mu m wide spectral range is less than 10%; and the refractive index of the CuI film is 2.2-2.5. The transmittance attenuation of the CuI film is less than 2% after the CuI film is bent at a bending radius of 5 mm and is bent 5000 times, and the CuI film exhibits excellent flexibility and optical performance. The method is simple in process, low in cost and suitable for large-scale production. The application solves the problems of narrow light transmission range and poor flexibility of traditional optical waveguide materials, is suitable for flexible optoelectronic device applications in the visible light to mid-infrared waveband, and has a wide market prospect.

The invention belongs to the technical field of oil reservoir microorganisms, and particularly relates to a zoococcus strain and application thereof. The bacterial strain is a Planococcus sp. Bacterial strain WL-9, and is a new strain of the Planococcus sp. The strain is separated from an oil reservoir source, can reduce interfacial tension between crude oil and water, plays a role in emulsifying the crude oil, is good in oil reservoir adaptability, and can convert the crude oil into methane in an extreme environment of the oil reservoir and in the presence of CO2. The invention provides a new high-quality strain resource for microbial oil recovery, and has great significance for improving the oil recovery rate, reducing carbon emission by CCUS microbial carbon conversion and treating and repairing petroleum pollution.

The invention relates to a 2.5 D optical waveguide chip and a preparation method and an application device thereof, and belongs to the technical field of integrated photoelectron and optical fiber communication. Aiming at the technical problems that an existing 3D optical waveguide based on a laser direct writing process cannot be manufactured at a wafer level, the production efficiency is low and the cost is high, the invention provides a 2.5 D optical waveguide chip which comprises a substrate and at least two layers of planar optical waveguides which are isolated by a cladding material and each layer is limited to extend in a plane of the planar optical waveguide; the waveguide distribution of the light inlet end face of the chip is matched with the fiber core distribution of the target multi-core optical fiber for coupling alignment, the waveguides of the light outlet end face of the chip are distributed in a step shape, and the waveguides located on different layers have different heights so as to be coupled and aligned with the corresponding optical fiber array distributed in the step shape. The chip is suitable for wafer-level batch manufacturing and is mainly used for forming core optical devices such as a multi-core optical fiber fan-in and fan-out assembly, a multi-core optical fiber optical receiver and a multi-core optical fiber optical transmitter.

The invention discloses a high-speed electro-optical modulator based on a heterogeneous integrated waveguide and a preparation method thereof, and belongs to the technical field of planar optical waveguide optical modulators and preparation thereof. The sensor is composed of a silicon substrate, a silicon dioxide oxide layer, a lead zirconate titanate flat plate layer, a polymer flat plate layer, a first grounding electrode, a signal electrode, a second grounding electrode and a polymer strip-shaped layer from bottom to top in sequence. The polymer strip-shaped layer and the polymer flat plate layer are made of the same material, and the refractive index of the polymer strip-shaped layer is lower than that of the lead zirconate titanate flat plate layer. The polymer flat plate layer prevents direct contact between lead zirconate titanate and the electrode, so that the loss of the modulator is greatly reduced. When an electric field is externally applied, the electric field is uniformly distributed between the signal electrode and the grounding electrode, and the thickness of the polymer flat plate layer and the size of the polymer strip-shaped layer are designed, so that more light fields are controlled in the lead zirconate titanate flat plate layer, and the electro-optical modulation efficiency is further improved. The manufacturing process is simplified, and the method has the advantages of low production cost, high efficiency and the like.

The application provides a device for two-dimensional spectrum spreading based on a planar optical waveguide. The device comprises: a light to be measured, a collimating system, an in-coupling grating, an out-coupling grating, a vertical grating, a waveguide and a detector, wherein the in-coupling grating and the out-coupling grating are symmetrically arranged inside the waveguide; the collimating system converts the light to be measured into parallel light; the parallel light enters the waveguide under the diffraction of the in-coupling grating and is transmitted inside the waveguide; the light is emitted from the waveguide under the action of an out-coupling grating with the same dispersion; a vertical grating in another direction is used to spread the light emitted from the waveguide in the vertical direction; the focused light reaches a light detector array to obtain a two-dimensional spectrum. The device combines the planar waveguide with the diffraction grating, maximally realizes the miniaturization of the spectrum, and can obtain high-resolution spectrum detection or a large spectrum detection range.

The invention discloses a multi-channel optical engine with a customizable optical spacing. The multi-channel optical engine comprises collimated light used for emitting collimated parallel light beams; the Z-BLOCK multiplexer / demultiplexer is located at the downstream of a light path of the collimated light and is used for processing the incident collimated parallel light and outputting four collimated light beams with different wavelengths; the converging lens or the lens array is located at the downstream of the light path of the Z-BLOCK multiplexer / demultiplexer and is used for converging and shaping the beam diameters of the four collimated lights; the planar optical waveguide chip is located at the downstream of an optical path of the converging lens or the lens array and is used for receiving the shaped four light beams and accurately controlling the distance between the input light beams through an optical waveguide by virtue of a waveguide structure of the planar optical waveguide chip; and the output light array is output from the planar optical waveguide chip to form a four-channel parallel light array with target spacing. The invention further discloses application of the multi-channel optical engine capable of being customized according to the optical distance to an optical module. According to the invention, the defect that the space micro-optics optical engine output light beam spacing is fixed and cannot be customized and adjusted in the prior art is overcome.

The invention relates to a three-dimensional four-core fan-out optical waveguide structure and a manufacturing method thereof, and belongs to the technical field of integrated optics. Comprising a glass substrate, a first gradient three-dimensional optical waveguide, a second gradient three-dimensional optical waveguide, a first planar optical waveguide and a second planar optical waveguide, the left end of the first gradual change three-dimensional optical waveguide and the left end of the second gradual change three-dimensional optical waveguide are located under the left end of the first planar optical waveguide and the left end of the second planar optical waveguide respectively. The right end of the first gradual change three-dimensional optical waveguide and the right end of the second gradual change three-dimensional optical waveguide are located on the two sides of the same layer of the right end of the first planar optical waveguide and the right end of the second planar optical waveguide respectively. The vertical directions of the first gradual change three-dimensional optical waveguide and the second gradual change three-dimensional optical waveguide are gradually changed from the lower layer to the upper layer from left to right, and the horizontal distance is gradually increased; the first planar optical waveguide and the second planar optical waveguide are located on the upper layer, and the horizontal distance between the two is gradually increased from left to right.

Composite IC die structures comprising a first IC die that has a first region directly bonded to a second IC die across a hybrid-bond interface and a topographic feature extending from a second region of the first IC die. In some examples, a hybrid bond interface is fabricated prior to forming a topographic IC die feature. In other examples, a hybrid bond interface is fabricated after forming a topographic IC die feature. A PIC die comprising a planar optical waveguide further includes an optical coupler protruding from a region of the die. In another region of the PIC die metallization features are embedded with a dielectric material suitable for forming a hybrid bond with a surface of an EIC die. Scaling of the directly bonded interconnections between the PIC and EIC die may facilitate further disintegration of the optical and electrical domains within a heterogenous chip / chiplet assembly.

The embodiment of the invention discloses a test system for a planar optical waveguide circuit chip and an optical receiving component, the chip comprises a first beam splitter, a modulation unit, a second beam splitter and a beam combining unit, the first beam splitter is connected with the input end of the modulation unit and the input end of the second beam splitter, and the first beam splitter is connected with the input end of the modulation unit and the input end of the second beam splitter. The input end of the first beam splitter is used as the input end of the planar optical waveguide circuit chip; the output end of the modulation unit and the output end of the second beam splitter are connected with the input end of the beam combining unit, and the output end of the beam combining unit serves as the output end of the planar optical waveguide circuit chip. According to the embodiment of the invention, the first beam splitter, the modulation unit, the second beam splitter and the beam combining unit are integrated on the same planar optical waveguide circuit chip, so that the system structure is greatly simplified, the occupied area of equipment is reduced, the test stability and the comparability between channels are further remarkably improved, and finally, the test efficiency and the accuracy of a test result can be effectively improved.

A lighting device for vehicles contains a flat optical waveguide, which has opposing flat sides and narrow sides connecting them, with numerous microstructure elements on a flat side of the optical waveguide. A number of light sources are positioned on one of the narrow sides of the optical waveguide, and a number of optical films are positioned on the light emission side of the optical waveguide. The optical films have an optical structure for deflecting light on the light emission side. At least one optical film on the side where the light enters has a structure for counteracting capillary effects.

This invention relates to a highly symmetric, wide-bandwidth flexible arrayed waveguide grating chip for FBG demodulation systems, belonging to the field of planar optical waveguide device technology. It comprises a polymer flexible substrate, a polymer lower cladding, a polymer waveguide core, and a polymer upper cladding. The refractive indices of the polymer upper and lower cladding materials are lower than those of the polymer waveguide core material. The polymer waveguide core is an optical waveguide structure integrated from two AWG and two MMI units. This invention solves the defects of existing arrayed waveguide gratings in FBG demodulation systems, such as demodulation blind zones and unidirectional transmission. It achieves demodulation with a wide dynamic range and high resolution for reflected wavelengths and supports bidirectional signal input and output at both ports, improving system flexibility. Furthermore, the use of polymer materials to fabricate optical waveguide devices offers significant advantages over inorganic material systems, including better flexibility, simpler processing, lower cost, and higher efficiency, making it suitable for dynamic deformation environments or bio-integrated scenarios.

A multi-channel optical power divider based on an MMI structure and its fabrication method are disclosed, belonging to the field of planar optical waveguide devices and their fabrication technology. From bottom to top, it consists of a silicon substrate, a polymer lower cladding, a strip-shaped polymer waveguide core layer, and a polymer upper cladding. The strip-shaped polymer waveguide core layer is based on an MMI structure and is encased within the polymer upper cladding. This waveguide-type power divider combines the advantages of large process tolerance and small size of MMI optical waveguide structures with the advantage of a wide variety of organic polymer materials, achieving the goal of equal power distribution across multiple different input ports. Furthermore, the fabrication process using polymer materials is relatively simple, requiring only conventional processes such as spin coating and photolithography, without the need for more complex processes. Moreover, it boasts low production costs, high efficiency, and the ability to be mass-produced, making it a practically applicable power divider.

An equivalent negative refractive index flat lens and a manufacturing method thereof, the method comprising the steps of: (1) forming reflective layers (20) on both opposing sides of a transparent substrate layer (10); (2) forming a protective layer (30) on each reflective layer (20); (3) forming a first bonding metal layer (40) on one of the protective layers (30) and a second bonding metal layer (50) on the other; and (4) stacking at least two flat optical waveguides along a first direction, and the first bonding metal layer (40) of each flat optical waveguide being bonded to an adjacent flat optical waveguide. The method includes a step (4) of contacting the second bonding metal layer (50) of the plate optical waveguide with heat and energization; a step (5) of taking two sets of multilayer planar optical waveguides, cutting one of the multilayer planar optical waveguides into a plurality of first striped planar optical waveguides and cutting the other into a plurality of second striped planar optical waveguides; and a step (6) of overlapping the first optical waveguide array (102) and the second optical waveguide array (103) along a first direction, and then adding protective window sheets (101, 104) on both sides.

The embodiment of the application discloses a kind of plane optical waveguide circuit chip and optical receiving assembly test system, chip includes first beam splitter, modulation unit, second beam splitter and beam combination unit, wherein the first beam splitter is respectively connected with the input end of modulation unit and the input end of second beam splitter, the input end of first beam splitter is as the input end of the plane optical waveguide circuit chip;The output end of modulation unit and the output end of second beam splitter are respectively connected with the input end of beam combination unit, and the output end of beam combination unit is as the output end of the plane optical waveguide circuit chip.The embodiment of the application is integrated in the same plane optical waveguide circuit chip by first beam splitter, modulation unit, second beam splitter and beam combination unit, substantially simplify system structure, reduce equipment floor area, and then significantly test the stability and the comparability between channel, finally can effectively improve test efficiency and the accuracy of test result.

The present application belongs to the technical field of guided-wave optics, and specifically relates to an angle-tunable non-polarized narrow-band optical band-pass filter. The optical filter can pass transverse electric waves and transverse magnetic waves at the same time, the passband center wavelengths of the transverse electric waves and the transverse magnetic waves monotonously and continuously change with the incident angle, and the two center wavelengths remain coincident during the tuning process; the passband full width at half maximum of the two kinds of waves has a polarization-independent narrow-band optical band-pass filtering effect; and the specific implementation comprises the following steps: a composite transparent body of a column and a planar optical waveguide; the column is cut along the longitudinal axis at a certain angle, and the planar optical waveguide is prepared on a cutting surface according to the transmission waveband; the planar optical waveguide is composed of thin films with different refractive indexes and thicknesses, and the two cutting bodies are pasted and sealed along the cutting surface to form a composite body; and wide-band antireflection films are coated on the two end surfaces of the composite body. The transmittance of the band-pass filter exceeds 99% in the tuning range, and the band-pass filter has important application value in optical communication, laser technology, precise spectroscopy and the like.

The utility model relates to the technical field of optical communication, in particular to a dense wavelength division device for improving planar optical waveguide edge channel isolation, which comprises an AWG device and a band-pass filtering film plated at the output end of the AWG device. The band-pass filtering film is made of a high-refractive-index material and a low-refractive-index material; the band-pass filtering film is used for reducing the transmittance of an optical signal of an edge channel at the output end of the AWG device and improving the isolation degree of the edge channel. The surface of the output end of the AWG device is plated with the band-pass filtering film, and a specific filtering spectrum is designed for the band-pass filtering film, so that signal light of a middle channel of the AWG device is not affected, signal light and light isolation of edge channels are enhanced, signal crosstalk of the edge channels is reduced, and the performance of a communication system is improved.

The application discloses a kind of full-automatic planar waveguide coupling equipment based on nanoscale sensing contact, including chip placement assembly, input component, output component;Input component and output component are respectively transmission connection with stepper motor;Stepper motor is electrically connected with driver;Coupling software controls driver to control stepper motor to drive input component and output component to carry out displacement in different directions respectively, realize that FA fiber core and chip waveguide carry out mode field matching, so as to realize optical waveguide preliminary alignment, coupling software automatically switches displacement step, again through input component, output component realizes accurate alignment;Coupling software controls driver to realize multi-channel equalization by controlling angle stepper motor step and movement;The application adopts high-precision stepper motor with high-precision sensing contact sensor, completely realizes that planar optical waveguide is fully automatic high progress coupling to light, improves the precision of planar waveguide coupling to light, and completely realizes high-precision automatic angle adjustment function.

Disclosed are a device and a method for transmitting a polarized signal for a quantum key distribution (QKD) system. A transmission device according to embodiments of the present disclosure can stably generate and transmit a plurality of polarization states only by controlling the operation of a laser light source by using an optical integrated structure composed of a planar lightwave circuit and a passive element. In particular, a transmission device according to another embodiment of the present disclosure is designed to be suitable for reference frame independent quantum key distribution (RFI-QKD), and thus generates light of different polarization states (vertical, horizontal, diagonal, anti-diagonal, right circular, left circular) through a transmission unit optical integrated module including a plurality of polarization-maintaining optical fibers, a junction unit, and an optical coupler, combines the light into a single output, and transmits the single output at a single photon level. According to the present disclosure, a transmission unit for QKD can be miniaturized and integrated without active element control, and stable polarization signal generation and highly reliable quantum key distribution can be simultaneously implemented.

The invention discloses a hybrid plasma electro-optical modulator based on a lead zirconate titanate film and a preparation method thereof, and belongs to the technical field of planar optical waveguide devices. The modulator consists of a Si substrate, a SiO2 oxide layer, a lead zirconate titanate thin film layer, a polymer optical waveguide layer, a first grounding electrode, a signal electrode and a second grounding electrode in sequence from bottom to top, wherein the polymer optical waveguide layer is prepared on the lead zirconate titanate thin film layer through spin coating, photoetching and wet etching. Silicon attached with a silicon dioxide buffer layer serves as a waveguide substrate, a lead zirconate titanate thin film layer serves as a waveguide core layer, and a polymer with the refractive index smaller than that of lead zirconate titanate serves as an optical waveguide layer. The selected polymers are various, the refractive index is small, and the refractive index difference between the selected polymers and a lead zirconate titanate film is large. The manufacturing technology is simple and compatible with the semiconductor technology, large-scale integration and production can be achieved, the mode optical switch can be applied to practice, and therefore the mode optical switch has important practical application value.

The application discloses a miniaturized time phase decoder and a QKD receiver, wherein all on-chip devices are made based on a PLC process, the difference between the lengths of interferometer arms can be accurately controlled by means of an existing process, and a phase shifter or a phase modulator or the like device does not need to be arranged in an interference ring to perform interference dimension stabilization; all functional devices are passive devices except for an external single-photon detector, and the time phase decoder has high stability and reliability; and since the mode of the PLC planar optical waveguide is basically consistent with the mode in the optical fiber, the polarization state does not need to be specially controlled before being coupled into the chip, the requirement for external polarization controllers and the like devices is reduced, and the volume of the QKD receiver is further reduced.

The invention discloses a liquid crystal modulation variable optical attenuator based on a multimode interference coupling structure, and belongs to the technical field of planar optical waveguide devices. The device is composed of a silicon dioxide substrate, a polymer optical waveguide core layer, a polymer cladding, a graphene lower electrode, a liquid crystal groove, a liquid crystal material, an ITO upper electrode and a glass substrate. The polymer optical waveguide core layer and the polymer cladding layer have the same thickness and are located on the silicon dioxide substrate together, the polymer optical waveguide core layer is wrapped in the polymer cladding layer, the graphene lower electrode is located on the polymer optical waveguide core layer and the polymer cladding layer, the liquid crystal groove is located on the graphene lower electrode, and the liquid crystal groove is located on the silicon dioxide substrate. The liquid crystal material is filled in the liquid crystal groove, and the glass substrate covers the liquid crystal material and the liquid crystal groove; and the ITO upper electrode is prepared on the glass substrate and is arranged in the liquid crystal material towards the graphene lower electrode. The variable optical attenuator combines the characteristics of large MMI process tolerance, small size and easy integration, and has practical application significance.

This invention discloses a wiring structure and scanning control method for a focal plane optical switch grating antenna array, belonging to the field of planar optical waveguide technology. The wiring structure includes multiple optical switch structural units arranged in an array, an optical waveguide bus layer, a first electrode wiring layer, and a second electrode wiring layer. Both the first and second electrode wiring layers include electrode wirings, electrodes, and control signal input contacts. The optical waveguide bus layer includes at least one optical waveguide bus and an optical coupling input terminal. The optical waveguide bus connects all optical switches in the array in series, and the coupling waveguide ends of the optical switches are connected to the grating transmitting antennas. The optical waveguide bus is located between the first and second electrodes and is parallel to the coupling waveguides of the optical switches. This invention eliminates the need for selection switches, enabling independent control of the operating state of any optical switch in the array. Furthermore, when the number of optical waveguide buses is greater than one, multiple optical switches can operate in parallel to improve the array scanning speed and flexibility.

The application discloses a low-power-consumption all-optical phase change memory based on a plasma enhancement effect, comprising a silicon-based planar optical waveguide, characterized in that a phase change ring structure capable of reversibly changing from a crystal state to an amorphous state under the evanescent field coupling effect of the waveguide is arranged on the waveguide, the phase change ring structure is clamped between a metal disc and a metal ring, a concentric circle structure formed by the phase change ring structure, the metal disc and the metal ring is integrally located on the upper surface of the waveguide or is semi-embedded in the waveguide or is completely embedded in the waveguide, the phase change ring structure is a phase change layer Ge2Sb2Te5 or Ge2Sb2Se4Te, has at least two stable states, namely a crystal state and an amorphous state, and the two states have obviously different absorption coefficients for probe light, and the phase change is uniform, the switching speed is faster and the power consumption is lower.

The present invention relates to a near-to-eye display system, comprising: an image display unit for projecting light; optical fibers in the flexible optical fiber bundle are in one-to-one correspondence with pixel points in the image display unit, the flexible optical fiber bundle is provided with a first port and a second port, and the first port is coupled to the image display unit; and the planar optical waveguide is internally provided with waveguide channels, the waveguide channels are in one-to-one correspondence with optical fibers in the flexible optical fiber bundle, the second port is coupled to the coupling-in ends of the waveguide channels, and the coupling-out ends of the waveguide channels are used for coupling out light to the outer side of the planar optical waveguide.