20 results about "Optical communication" patented technology

A reactor for processing a substrate includes a first housing defining a processing chamber and supporting a light source and a second housing rotatably supported in the first housing and adapted to rotatably support the substrate in the processing chamber. A heater for heating the substrate is supported by the first housing and is enclosed in the second housing. The reactor further includes at least one gas injector for injecting at least one gas into the processing chamber onto a discrete area of the substrate and a photon density sensor extending into the first housing for measuring the temperature of the substrate. The photon density sensor is adapted to move between a first position wherein the photon density sensor is directed to the light source and a second position wherein the photon density sensor is positioned for directing toward the substrate. Preferably, the communication cables comprise optical communication cables, for example sapphire or quartz communication cables. A method of processing a semiconductor substrate includes supporting the substrate in a sealed processing chamber. The substrate is rotated and heated in the processing chamber in which at least one reactant gas is injected. A photon density sensor for measuring the temperature of the substrate is positioned in the processing chamber and is first directed to a light, which is provided in the chamber for measuring the incident photon density from the light and then repositioned to direct the photon density sensor to the substrate to measure the reflection of the light off the substrate. The incident photon density is compared to the reflected light to calculate the substrate temperature.

Consistent with the present disclosure, data, in digital form, is received by a transmit node of an optical communication system, and is then provided to a modulator that, in turn, modulates light, received from an optical source at one of a plurality of periodically and preferably minimally spaced wavelengths. The plurality of periodically spaced wavelengths or carriers are grouped together with minimal carrier spacing, to form a superchannel. The carrier spacing between adjacent carriers is determined by detecting a beat frequency of a combined optical signal that includes the outputs of two adjacent optical sources. The beat frequency corresponds to a frequency difference between the outputs of the adjacent carriers. This frequency difference should correspond to a desired carrier spacing between each of the plurality of carriers. A frequency error between the beat frequency and the desired carrier spacing is then measured by down-converting the beat frequency with respect to a target reference frequency corresponding to the desired carrier frequency spacing. Based on the determined frequency error, the optical sources are controlled to adjust in frequency to minimize or reduce the frequency error to zero. For every pair of adjacent carriers, the corresponding outputs of the optical sources are compared in the above manner to determine a plurality of frequency errors. Each optical source can thus be tuned in order to realize a precise carrier spacing between each of the adjacent carriers.

The invention provides a fingerprint identification device, which includes detection substrate. several fingerprint detection units are arranged on the detection substrate; the light blocking plate is located on one side of the detection substrate with a fingerprint detection unit, the light blocking plate is provided with an optical communication hole which is in one-to-one correspondence with the fingerprint detection unit; a cover plate is positioned on one side of the light blocking plate facing away from the detection substrate, the cover plate comprises a light-emitting surface facing the light-blocking plate and a touch surface facing away from the light-blocking plate; a light source is positioned on one side of the light blocking plate facing away from the detection substrate andused for emitting light to the cover plate, at least a part of light of the light source can be reflected by the fingerprint on the touch surface of the cover plate to the light hole; Wherein the fingerprint detection unit is used for outputting corresponding electric signals according to the light intensity emitted to the fingerprint detection unit through the corresponding light hole. Correspondingly, the invention also provides fingerprint identification equipment. The invention can increase the distance of fingerprint identification.

The invention provides an all-optical threshold device based on two-dimension material saturated absorption effect. The device comprises an optical amplifier arranged in the light transmission direction, and a saturable absorber connected with the optical amplifier, wherein the saturable absorber comprises an optical waveguide and a two-dimensional material covering the surface of the optical waveguide. The device is quite simple in structure, non-linear optical fiber or non-linear PPLN semiconductor devices are not needed, and the defects of the prior art that loss is large, stability is poor and cost is high are overcome. By the adoption of the device, the signal to noise ratio of received signals is increased, signal quality is improved, and the reception judgment performance of an optical communication system can be improved. The invention further provides a method for preparing the all-optical threshold device. The method comprises the steps of coating the surface of the optical waveguide with the two-dimensional material to form the saturable absorber, and connecting the optical amplifier with the saturable absorber through optical fiber to form the all-optical threshold device based on two-dimension material saturated absorption effect. The all-optical threshold device can be used for all-optical signal processing.

A vehicle network system is provided with a plurality of star networks, a plurality of devices mounted on a vehicle are connected in a star shape through respective branch lines in each of the star networks, and a trunk line for connecting the plurality of star networks, the branch lines are communication lines for optical communications, and the trunk line is a communication line for electric communication.

The invention relates to a nanosecond level pulse peak value detection method and belongs to the technical field of optical communication. According to the method, a nanosecond level pulse signal is broadened through a low-pass filter, then, a clock signal obtained after phase position adjustment is triggered, and therefore an analog-digital converter can sample data more accurately. Under the condition that a high-speed analog-digital converter is not needed, a nanosecond level pulse signal peak value can be detected. With the detection method, the requirement for the sampling rate of an analog-to-digital conversion unit can be lowered, the method is simple and easy to perform, and cost of the needed devices is low.

The invention relates to a marine low-smoke halogen-free low-toxicity frame-retardant fire-resistant soft optical cable and a manufacturing method thereof, and belongs to the technical field of optical communication special optical cable manufacturing. The marine low-smoke halogen-free low-toxicity frame-retardant fire-resistant soft optical cable is a special fire-resistant optical cable for data communication, and is composed of ultra-low-loss low-temperature-resistant tightly-sleeved optical fiber units, a high-modulus aramid fiber and waterproof aramid fiber mixed reinforcing piece, a halogen-free low-smoke flame-retardant polyolefin oxygen-isolation layer inner protective sleeve, a fire-resistant white mica tape wrapping layer, a stainless steel wire woven wire layer and a crosslinked polyolefin outer protective sleeve. The ultra-low-loss low-temperature-resistant tightly-sleeved optical fiber units are twisted, high-modulus aramid fiber and waterproof aramid fiber are adopted for making the high-modulus aramid fiber and waterproof aramid fiber mixed reinforcing piece, the oxygen-isolation layer inner protective sleeve wraps the reinforcing piece in an extruded mode, the fire-resistant white mica tape wrapping layer wraps the oxygen-isolation layer inner protective sleeve, stainless steel wires are woven outside the fire-resistant white mica tape wrapping layer to form the stainless steel wire woven wire layer, and the crosslinked polyolefin outer protective sleeve wraps the fire-resistant white mica tape wrapping layer and the stainless steel wire woven wire layer in an extruded mode.

The invention relates to the field of topological photonic crystals and integrated photonic chips, and discloses an optical communication waveband wavelength division multiplexing silicon-based energy valley photonic crystal structure which comprises a silicon substrate which is divided into four areas through three boundaries, wherein first circular air holes and second circular air holes in the four areas are arranged in a triangular lattice staggered mode and form four topological waveguide structures at the boundary, and a second topological waveguide and a fourth topological waveguide located on the two sides respectively adopt air holes with different radiuses. Light waves of the two wave bands enter from the first topological waveguide, one wave band exits from the second topological waveguide, the other wave band exits from the fourth topological waveguide, and the structure can be used for achieving communication optical band wavelength division multiplexing on a micro-nano structure.

Disclosed is an optical-communication-module assembly device which is used for assembling a light-emitting assembly, which is absorbed by a suction nozzle, onto a substrate. The light-emitting assembly is provided with a first surface and a second surface, which are face to face. The first surface is provided with a first electrode and the second surface is provided with a second electrode. A conductive adhesive is attached on the second surface. The substrate is provided with a third surface and a forth surface, which are face to face. The third surface is provided with a welding spot corresponding to the second electrode. The forth surface is provided with a bonding pad connected electrically with the welding spot. The optical-communication-module assembly device includes a first probe, a measurement unit and a control unit. The first probe is located on the suction nozzle to contact the first electrode. The measurement unit is connected with the first probe and the bonding pad to measure the resistance of the light-emitting assembly when the light-emitting assembly is pressed downwards to the welding spot. The control unit controls movement of the suction nozzle according to the resistance.

For optical communications between semiconductor ICs, optical transceiver assembly subsystems may be integrated with a processor. The optical transceiver assembly subsystems may be monolithically integrated with processor ICs or they may be provided in separate optical transceiver ICs coupled to or attached to the processor ICs.

The invention discloses a device for placing an optical communication module in an aerospace environment. The device comprises a hexahedron chassis, four surfaces of the hexahedron chassis are integrally formed, the other two surfaces are respectively an upper cover plate and a front panel, a support plate is arranged in the hexahedron chassis, and the support plate is parallel to a bottom plate in the hexahedron chassis. A wavelength division multiplexer and a wavelength division demultiplexer are fixed on the support plate, a group of mounting grooves are formed in a bottom plate in the hexahedron chassis, a heat dissipation boss is arranged beside the mounting grooves, a circuit board is arranged between the heat dissipation boss and the support plate, and a group of screw seats with internal threads are arranged at the periphery of the heat dissipation boss. A group of fixing holes corresponding to the screw seats are formed in the circuit board; and a group of connector mounting holes are further formed in one side plate of the hexahedral chassis. The device is low in cost and compact in structure, and can improve the heat dissipation effect of electronic components in the aerospace optical communication module.

The invention belongs to the technical field of photoelectric communication, and particularly discloses a multi-platform combined optical communication system and method, and the system comprises a follow-up turntable optical communication unit which is used for receiving an electric signal and converting the electric signal into an optical signal, a mobile platform optical communication unit which is used for restoring the received optical signal into the electric signal, and a user various electric signal input unit. The user various electric signal input unit is in signal connection with the follow-up turntable optical communication unit, the follow-up turntable optical communication unit is in signal connection with the mobile platform optical communication unit, and the mobile platform optical communication unit is in signal connection with a user. The system can meet the integrated communication requirements of various platforms in different communication modes, and is compact in structure, small in size, convenient to carry and high in expansibility, and the combined units can be increased, decreased and adjusted according to requirements.

The present disclosure relates to the technical field of optical communication, and particularly to a laser emitting system, including a burst signal controller, a transfer switch, a power supply, a laser device and a bypass circuit, the burst signal controller is connected with the transfer switch and used for sending a burst control signal to the transfer switch, and the transfer switch is used for connecting the power supply to the laser device or the bypass circuit according to the burst control signal. The establishment time of an optical signal of a laser device can be shortened by using the laser emitting system of the present disclosure.