55 results about "Arrayed waveguide grating" patented technology

The invention provides a photon parallel matrix convolution operation chip which can be applied to the technical field of integrated photonics and optical calculation. The chip is integrated by a 1 * N array waveguide grating, a 1 * 2 beam splitter array, an input matrix modulator array, two N * 1 array waveguide gratings, two 1 * N beam splitters, a weight matrix modulator array, an M * M array waveguide grating detector array and a detector array. Main functional devices are integrated in a monolithic mode, the system is compact, the complexity and power consumption of the system can be effectively reduced, and the calculation efficiency is improved.

The invention discloses an end-to-end optical computing chip based on multi-mode analog signal fusion processing, and belongs to the optical computing technology. Comprising a multi-mode input fusion front-end module, an optical fiber input interface and an end-to-end reasoning module. The multi-mode input fusion front-end module can convert different types of original analog signals such as images, spectrums and radio frequencies into unified broadband spectrum input signals. The end-to-end reasoning module constructs a deep optical neural network, and the deep optical neural network comprises a sensing-convolution integrated unit realized by an arrayed waveguide grating (AWG). The end-to-end reasoning module further comprises a photoelectric non-linear-pooling integrated unit, the average pooling function and the non-linear activation function are achieved at the same time, and light path loss is effectively compensated through injection of the supply light source. And finally, integrating the signals subjected to multi-layer processing by a full connection layer, and outputting a classification result by an output layer. According to the chip architecture, direct and efficient processing of multi-mode analog signals is realized.

The invention provides signal coding equipment, an imaging system and an imaging method. The signal coding equipment comprises an array waveguide grating, a coding optical fiber, a delay optical fiber and an optical splitter, the array waveguide grating is configured to convert an initial signal emitted by the light source into multiple paths of target signals; the optical splitter is configured to combine multiple paths of target signals and then emit the combined signals; a plurality of paths of coding optical fibers and a plurality of paths of delay optical fibers with different lengths are arranged behind the array waveguide grating, and each path of delay optical fiber is connected to the coding optical fiber of the corresponding coding sequence; the delay optical fiber is configured to delay a transmitted target signal, and the coding optical fiber is configured to perform pulse coding on the transmitted target signal. According to the invention, the original pulse signal is coded by using the sequence code with good orthogonality, so that the signal processing accuracy is improved. And the delay optical fibers are grouped, so that the corresponding channels in each group of channels can be simultaneously transmitted, the signal transmitting time is shortened, the signal processing efficiency is improved, and the point acquisition rate can be improved while the fuzzy distance is expanded.

The present invention provides a photonic integrated chip, a laser radar using the photonic integrated chip, and a detection method. The photonic integrated chip includes: a substrate, a first arrayed waveguide grating (AWG), a second arrayed waveguide grating (AWG), multiple multimode interference couplers (MIFs), multiple optical couplers (OFs), and a photodetector. The first arrayed waveguide grating (AWG) is used to split a transmitted laser signal to obtain multiple components of beamed transmitted signals; the MFIs are used to receive the beamed transmitted signals and transmit them to a target object to be detected, as well as receive reflected light spots and transmit them to the optical couplers. The second arrayed waveguide grating (AWG) is used to split a local laser signal to obtain multiple components of beamed local signals; the OFs are used to process the reflected light spots and the beamed local signals to obtain coupled signals; and the OFs are used to receive and process the coupled signals. This results in a photonic integrated chip for laser radars with a high chip integration density.

The invention provides a high-resolution broadband integrated spectrometer based on thin film lead zirconate titanate and a preparation method, and relates to the technical field of integrated optics. The structure of the spectrometer comprises a substrate; the silicon dioxide lower cladding layer is arranged on the substrate; the lead zirconate titanate thin film waveguide layer is arranged on the silicon dioxide lower cladding, a plurality of micro-ring resonators and a plurality of array waveguide gratings are arranged in the lead zirconate titanate thin film waveguide layer, and each array waveguide grating is connected with each micro-ring resonator through a waveguide; the sectional periodic metal electrode arrangement system is arranged in each section of straight waveguide area in the micro-ring resonator; wherein the plurality of micro-ring resonators are configured with resonant wavelengths which are distributed in a staggered manner, and the interval between the adjacent resonant wavelengths is 1 / n of the interval between the array waveguide grating channels; the spectrometer is configured to change the local waveguide refractive index by using the residual polarization effect of the lead zirconate titanate thin film through a segmented polarization method so as to realize alignment of the resonant wavelength and the center of the array waveguide grating channel.

The application discloses a reconfigurable microwave photonic filter, comprising a laser source, an electro-optic modulator, an adjustable feedback type array waveguide grating, a filtering module and a photoelectric detector, the laser source generates an optical signal which is transmitted to the electro-optic modulator, the electro-optic modulator modulates the optical signal after receiving the optical signal, forms a corresponding sideband, the adjustable feedback type array waveguide grating divides the spectrum of the optical signal into different wavelengths, and independently adjusts the amplitude and phase of the optical signals with different wavelengths, then the filtering module filters out the periodically repeated signals, and the photoelectric detector converts the filtered optical signal into an electrical signal, thereby completing the optical-electric conversion. The reconfigurable microwave photonic filter and the filtering method have the advantages of simple structure, highly programmable spectrum shape, fast reconfigurable response and high integration, and will have great attraction in the field of high-frequency signal processing. The application obtains: National Natural Science Foundation of China Youth Science Foundation Project (62204156).

The application discloses an end-to-end optical computing chip based on multi-modal analog signal fusion processing, and belongs to the technical field of optical computing. The chip comprises a multi-modal input fusion front-end module, a fiber input interface and an end-to-end inference module. The multi-modal input fusion front-end module can convert different types of original analog signals such as images, spectra and radio frequencies into unified broadband spectral input signals. The end-to-end inference module builds a deep optical neural network, which comprises a "sensing-convolution integrated" unit realized by an arrayed waveguide grating (AWG). The end-to-end inference module also comprises an optoelectronic nonlinear-pooling integrated unit, which simultaneously realizes the functions of average pooling and nonlinear activation, and effectively compensates for optical path loss through injection of a light source. Finally, the signals processed by multiple layers are integrated by a full connection layer, and a classification result is output by an output layer. The chip architecture realizes direct and efficient processing of multi-modal analog signals.

The embodiment of the invention provides a vehicle-mounted communication method, device and system and a storage medium, and relates to the technical field of communication. The method comprises the following steps: allocating a wavelength channel for each sensor through a dynamic wavelength allocation controller according to the type and communication load of the sensor; according to the wavelength channel allocated to each sensor, generating an optical signal of a corresponding wavelength through a temperature control distributed feedback laser, and modulating data of each sensor to the optical signal of the corresponding wavelength; the modulated optical signals with different wavelengths are input into an array waveguide grating multiplexer to be multiplexed into single-path optical signals, and demultiplexing is carried out through an array waveguide grating demultiplexer to generate data of each sensor; the communication load of each sensor is fed back to the dynamic wavelength allocation controller. According to the method, based on the types of the sensors and the communication loads, wavelength channels are dynamically allocated to different sensors, the time delay of multiplexing and demultiplexing is reduced, and therefore the real-time performance and reliability of vehicle-mounted communication are improved.

The present application discloses a silicon-on-insulator array waveguide grating chip for dense wavelength division multiplexing, which relates to the field of integrated silicon photonics technology. The chip includes an AWG and a wavelength thermal tuning structure. The AWG is composed of an input waveguide, a first slab waveguide, an array waveguide, a second slab waveguide, and an output waveguide connected in sequence along the optical path direction. The AWG is used to implement wavelength division multiplexing and demultiplexing. The wavelength thermal tuning structure includes a thermal tuning electrode and a metal electrode. The thermal tuning electrode is located above the array waveguide and is connected to an external control circuit via the metal electrode. The thermal tuning electrode is used to heat the array waveguide according to an external voltage to achieve wavelength tuning of the AWG channel. As the voltage amplitude increases, the heat generated by the thermal tuning electrode increases, and the wavelength of the AWG channel drifts toward a longer wavelength. The technical solution of the present application can realize multi-wavelength dense wavelength division multiplexing on a compact chip, has the advantages of small size and high reliability, and can realize passband wavelength control through the wavelength thermal tuning structure to meet the application requirements of multi-wavelength optical networks.

This application relates to a method for producing a refractive and diffractive hybrid two-dimensional optical waveguide, belonging to the technical field of optical waveguide design, and includes the following steps: S1, setting the beam transmission path and determining the coupling-in region, transition region, and coupling-out region on the waveguide plate; S2, forming an array coupling-in grating and an array coupling-out grating in the coupling-in and coupling-out regions defined on the waveguide plate using an array waveguide grating process; S3, determining the grating period, transparent portion width, grating width, resolution, and dispersion rate of the transition region based on a preset calculation rule; S4, using the calculation data from S3, forming a diffraction transition grating in the transition region defined on the waveguide plate using a surface relief process. The hybrid refractive and diffractive waveguide results in a lower overall cost, better color, higher brightness and luminous efficiency, simpler process, higher mass production capability, less susceptibility to rainbow patterns, and no light leakage from the back side. It also requires low equipment costs and has a coupling efficiency close to 100%, leading to better performance.

The application discloses a dense optical fiber coding method based on an optical switch and a weak reflectivity grating string, and comprises the following steps: 1, a light source module emits a C-band pulse signal, and the signal contains optical pulses with different central wavelengths and overlapping in a time domain; 2, a weak reflectivity grating string is used to code each node to obtain different wavelength pulse combination types, and the coding signals of different coding nodes on the same link are spaced apart in the time domain; 3, the coding signal is injected into an array waveguide grating through an optical circulator, and is decomposed into more than one single-wavelength pulse signal; 4, a detector array and a collection card are used to carry out photoelectric conversion on the coding pulse signal, and the collected signal is output to an FPGA and an upper computer for processing and display; the problems that the prior art cannot be applied to realize real-time coding of a large-scale and high-reliability all-optical network and that the real-time coding scale is limited and cannot meet the use requirements of a large-scale network are solved.

A clamp used for athermal arrayed waveguide grating chip end face external detection and cleaning comprises a main body, the two sides of the main body are provided with inclined faces, one end of the main body is provided with an extending part extending towards the inclined faces, and a limiting groove used for positioning a grating chip is formed between the extending part and the inclined faces. According to the clamp, external detection and cleaning can be carried out on the input and output coupling end face of the array waveguide grating chip at a fixed angle, and more convenient and faster coupling end face external detection and cleaning are provided under the condition that normal operation is not affected.

A coupling device for a multi-channel optical fiber array and a multi-layer arrayed waveguide grating, includes: a first clamping component and a second clamping component. A plurality of optical fibers that are spaced apart in an X-axis direction are connected on the first clamping component, each optical fiber extends in a Y-axis direction, and a plurality of arrayed waveguide gratings that are spaced apart in the X-axis direction are connected on the second clamping component. Each arrayed waveguide grating extends in the Y-axis direction, the optical fibers and the arrayed waveguide gratings are disposed in a one-to-one coaxial mapping manner, each arrayed waveguide grating is right-trapezoid-shaped, and beveled surfaces of any two arrayed waveguide gratings are located on a same plane. A wavelength division multiplexing technology is combined with a multi-channel parallel transmission technology.

An arrayed waveguide grating device includes an input coupler configured to receive a light signal and split the light signal into a plurality of output light signals. The device also includes a plurality of waveguides optically connected to the input coupler, each waveguide having a plurality of waveguide portions having respective sensitivities to variance in one or more parameters associated with operating of the optical arrayed grating device. Lengths of the respective portions are determined such that each waveguide applies a respective phase shift to the output light signal that propagates through the waveguide and the plurality of waveguides have at least substantially same change in phase shift with respective changes in the one or more parameters associated with operation of the device. An output coupler is optically connected to the plurality of waveguides to map respective light signals output from the plurality of waveguides to respective focal positions.

The invention provides an all-optical fast Fourier transform calculation implementation method and a photonic device. The method comprises the following steps: demultiplexing a time sampling vector based on a first array waveguide grating to obtain a parallel multi-wavelength signal; carrying out column-by-column phase modulation on the parallel multi-wavelength signals according to a discrete Fourier transform matrix based on a phase shift waveguide array to obtain weighted signals; and combining the weighted signals based on the second array waveguide grating to obtain an output optical signal. According to the method provided by the invention, a parallel multi-wavelength signal is obtained by demultiplexing a time sampling vector based on a first array waveguide grating; carrying out column-by-column phase modulation on the parallel multi-wavelength signals according to a discrete Fourier transform matrix based on a phase shift waveguide array to obtain weighted signals; and on the basis of the second array waveguide grating, weighted signals are combined to obtain output optical signals, the physical characteristics of high selectivity and low loss of an integrated photonic device are fully utilized, and efficient and high-fidelity Fourier transform calculation is realized in an integrated form with low structural complexity.

Athermal arrayed waveguide grating structure that may operate as an optical filter including an input Silicon (Si) slab waveguide, an output Si slab waveguide, the input Si slab waveguide and the output Si slab waveguide optically connected by an arrayed group of Silicon Nitride (SiN) grating waveguides. Temperature insensitivity of the structure is achieved by locating output waveguide(s) of the Si output slab waveguide at / within a 10-degree angle offset from the center line of the output Si slab waveguide.

Thermally compensated waveguides are disclosed herein. According to one aspect, the present disclosure proposes new ways to combine negative TOC (NTOC) material layers within the waveguides. NTOC materials can be implemented in one or more of a cladding layer, a core rib / channel waveguide, a horizontally segmented waveguide, a vertically segmented waveguide, a sub-wavelength grating structure, and / or in various other waveguide structure implementations including arbitrary core or cladding shapes. The integration of NTOC materials improves the temperature dependence of the waveguide spectrum. The need for fast and efficient optical-based technologies is increasing as Internet data traffic growth rate is overtaking voice traffic, pushing the need for optical communications. The new waveguide structures can be integrated into waveguides, individual devices, integrated devices like arrayed waveguide grating devices, and photonic integration circuits (PICs), decreasing temperature dependence of such devices and circuits.

The invention relates to the field of integrated optics, and particularly provides an array waveguide grating, and the array waveguide grating comprises a first array waveguide which comprises a group of first transmission waveguides which are arranged at intervals, and each first transmission waveguide comprises a first sub-waveguide and a second sub-waveguide which are arranged at intervals in a signal transmission direction; the second array waveguide comprises a group of second transmission waveguides which are arranged at intervals, the first transmission waveguides and the second transmission waveguides are arranged in a one-to-one correspondence manner, and the thermo-optical coefficient of the second transmission waveguides is greater than that of the first transmission waveguides; the phase shifter array comprises a plurality of phase shifters, and the phase shifters and the second transmission waveguides are arranged in a one-to-one correspondence mode; optical signals are coupled and transmitted to the corresponding second transmission waveguides through the first sub-waveguides, phase modulation is carried out on the optical signals through the phase shifters, and the optical signals subjected to phase modulation are coupled and transmitted to the corresponding second sub-waveguides. The scheme can effectively reduce the insertion loss of the transmission waveguide and effectively improve the modulation efficiency.

This invention relates to a fiber-coupled dynamic interferometer based on arrayed waveguide grating beam splitting, wherein the light source and the arrayed waveguide grating are arranged in a motion module. The light source is connected to the input port of the arrayed waveguide grating via an optical fiber. The motion module allows any one of the multiple output ports of the arrayed waveguide grating to be connected to an optical fiber at the incident end of a collimating structure. A half-wave plate and a beam splitter prism of the imaging element group are sequentially arranged on the output optical path at the output end of the collimating structure. The beam splitter prism splits the beam passing through the half-wave plate into a reference beam propagating along a first optical path and a measurement beam propagating along a second optical path. A mirror of the imaging element group reflects the reference beam back to the beam splitter prism. The surface under test reflects the measurement beam back to the beam splitter prism. The reference beam and the measurement beam reflected back to the beam splitter prism interfere with each other and are imaged onto the target surface of the camera. This achieves accurate measurement of the wavefront image of the surface under test.

The utility model provides a dense wavelength division multiplexing transmission system capable of expanding O-band wavelength signals, which comprises a first main circuit and a second main circuit which can mutually transmit optical signals, the first main circuit comprises a first array waveguide grating module, one side of the first array waveguide grating module is in butt joint with a plurality of first main circuit optical modules, and the other side of the first main circuit optical modules is in butt joint with a plurality of second main circuit optical modules. The other side of the first array waveguide grating module is sequentially connected with a first filter and a dispersion compensation module, a first amplifier is further arranged between the first array waveguide grating module and the first filter, one side of the dispersion compensation module is in butt joint with a first expansion port, and the first expansion port is connected with a first expansion branch. Compared with the prior art, the system has the advantages that the C band DWDM optical module is directly adopted in the main line, signal conversion does not depend on the Muxponder, the transmission rate of each channel can be increased to 100 Gbps or above, O band wavelength signals are also combined into the main line for long-distance transmission, and the ever-increasing communication requirements are met.

The present disclosure provides a polarization-insensitive array waveguide grating applied to the field of optical communication wavelength division multiplexing technology, comprising: an input channel waveguide, which inputs multi-wavelength mixed polarization state composite light into an input slab waveguide area; the input slab waveguide area diffracts the multi-wavelength mixed polarization state composite light; a first array waveguide module, which performs power distribution on the diffracted light from the input slab waveguide area to form a plurality of first composite lights, and transmits the first composite lights to corresponding polarization beam splitters respectively; a polarization beam splitter module, which separates each first composite light into a plurality of multi-wavelength second composite lights with single polarization; a second array waveguide module, which transmits the plurality of second composite lights to an output slab waveguide area respectively; the output slab waveguide area diffracts the plurality of second composite lights and focuses the diffracted light of different wavelengths to different output channel waveguides; and the output channel waveguide, which outputs light of different polarization states at the same specific wavelength.

The present application relates to an array waveguide grating. The array waveguide grating comprises an input coupler, a waveguide array and an output coupler, wherein the waveguide array is coupled between the input coupler and the output coupler, and the waveguide array comprises a plurality of waveguides; the input coupler is used for allocating received optical signals to the plurality of waveguides, and the waveguides are used for guiding the allocated optical signals; and the output coupler is used for coupling the optical signals, which are transmitted on the plurality of waveguides. The input coupler has a first refractive index, each waveguide has a second refractive index, and the output coupler has a third refractive index, wherein the first refractive index and the third refractive index are both greater than the second refractive index. The array waveguide grating can solve both the problem of an insertion loss of a star coupler being relatively high and the problem of a phase error being relatively large due to the roughness of a side wall of a waveguide, and insertion loss of the array waveguide grating is relatively low.

The present application belongs to the field of communication technology, and particularly relates to a kind of on-chip multi-path broadband white noise generation method based on chaotic micro-ring optical frequency comb, the implementation of the method includes semiconductor laser, micro-ring resonator, arrayed waveguide grating, photodetector, characterized by: the above-mentioned devices are integrated in the same chip substrate;Semiconductor laser output continuous light injection micro-ring resonator will occur four-wave mixing, self-phase modulation, cross-phase modulation and dispersion combined action, and equal-interval chaotic optical frequency comb is output through the straight-through end of micro-ring resonator.Coupling together after a plurality of micro-ring resonators generate chaotic optical frequency comb of different free spectral range, demultiplexing is carried out through arrayed waveguide grating, and finally multi-path broadband noise signal is output.Compared with existing noise source, the structure is simple, and has the advantages of low power consumption, high stability, bandwidth expansion, and solves the problem of lack of multi-path broadband noise signal implementation scheme, and can be applied to the field of secure communication, random number generation, etc.

The present application relates to the field of on-chip waveguide spectrum splitting technology, and particularly to a polarization-insensitive arrayed waveguide grating structure and a design method thereof. The structure comprises an input end waveguide, an input slab waveguide, an array waveguide, an output slab waveguide and an output end waveguide connected in sequence along the light propagation direction; the array waveguide comprises a plurality of strip waveguides, and the adjacent strip waveguides have a preset optical path difference; the input end waveguide, the strip waveguide and the output end waveguide all adopt a vertical coupling double-core three-layer waveguide structure. By introducing the double-core three-layer waveguide structure, the light field coupling effect formed by the two high refractive index waveguide core layers and the intermediate low refractive index isolation layer is utilized to regulate the electromagnetic field distribution of the TE mode and the TM mode in the waveguide cross section, and then the effective refractive index and the group refractive index of different polarization modes are adjusted, the phase consistency of the TE mode and the TM mode is ensured, and on the premise of maintaining the compact size of the device, the performance targets of low insertion loss, high spectral resolution and polarization insensitivity are achieved.

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.

This invention discloses a laser alarm, comprising an optical receiving system, an optical scanning system, an optical switch, an optical amplification system, a wavelength division detection system, and a signal processing system. The optical system receives incoming laser light and transmits it to the optical scanning system. The optical scanning system uses a micro-mirror to perform the scanning. After passing through the optical switch, visible light signals directly enter the wavelength division detection system, while near-infrared light signals are amplified before entering the system. In this design, the optical switch, optical amplification system, and wavelength division detection system are integrated onto a single silicon photonic chip, including a silicon-based waveguide switch, a silicon-based waveguide amplifier, an arrayed waveguide grating, and a silicon-based photodetector. The signal processing system is connected to the micro-mirror chip and the silicon-based photodetector acquisition card. This invention achieves miniaturization of the laser alarm, enabling rapid detection of threatening laser signals and acquisition of laser azimuth and wavelength information, with high directional accuracy and a low false alarm rate.

The embodiment of the utility model discloses an optical module, the optical module comprises a substrate, an array waveguide grating assembly and a supporting assembly, and the substrate is provided with a first surface; the array waveguide grating assembly comprises a substrate layer and a waveguide layer which are stacked, the waveguide layer is provided with an array waveguide grating, the waveguide layer faces the first surface of the substrate, and the substrate layer is opposite to the first surface; the supporting assembly is connected with the substrate layer of the array waveguide grating assembly to support the array waveguide grating assembly, and the array waveguide grating assembly is suspended on the first surface of the substrate through the supporting assembly. According to the application, the array waveguide grating assembly is indirectly fixed on the substrate through the supporting assembly, so that the array waveguide grating assembly is suspended on the first surface of the substrate, and the array waveguide grating assembly is not directly fixed with the substrate; the problem of cracking of the array waveguide grating assembly caused by mismatching of thermal expansion coefficients of the substrate and the array waveguide grating assembly is avoided, and the reliability of the optical module is effectively improved.

The present invention discloses an improved arrayed waveguide grating spectrometer chip. The chip comprises a substrate, an input waveguide, a free propagation block waveguide, and a waveguide array arranged on the substrate. The waveguide array is primarily composed of a plurality of output waveguides arranged in an array at intervals. The input waveguide, free propagation block waveguide, and output waveguide are sequentially arranged along the propagation direction of light. The input and output ends of the input waveguide are respectively coupled to a light source and the input end of the free propagation block waveguide. The output end of the free propagation block waveguide is respectively coupled to the input ends of a plurality of output waveguides. The output light from the output end of each output waveguide is irradiated onto a detector plane. The tilt angle of the output light beams of each output waveguide in the present invention increases the degree of overlap between the diffraction fields of each output waveguide at the detector plane, enabling the present invention to achieve both output light beam focusing and dispersion functions while also enhancing the intensity, resolution, and contrast of the spectrum.

The application provides a power adjustable wavelength division multiplexer with power-off protection function, which aims to solve the technical problem that the existing power adjustable wavelength division multiplexer does not have power-off alarm function, so that the optical network cannot realize automatic switching protection, timely fault positioning and fault recovery. The application comprises an array waveguide grating module group, a variable optical attenuator array module group and a circuit controller module group, the circuit controller module group is connected with the variable optical attenuator array module group, the circuit controller module group is provided with a VOA controller and an OS controller, the VOA controller is connected with the variable optical attenuator array module group, the OS controller is connected with an optical switch module group, and the optical switch in the optical switch module group works in a closed state when not powered and works in an open state when powered. The optical switch of the application is in a closed state, and the optical power is abnormal, so that the power adjustable wavelength division multiplexer has power-off protection function.

The application discloses a programmable integrated chip and a control method for a high-speed communication network. The chip comprises a fiber coupler array, a plurality of electro-optical modulators, a plurality of optical switches, a plurality of cross waveguides and an array waveguide grating. The fiber coupler array comprises a plurality of first fiber couplers, a plurality of second fiber couplers and a third fiber coupler. Each output end of the first fiber couplers is connected to each input end of the plurality of electro-optical modulators in one-to-one correspondence. Each output end of the plurality of electro-optical modulators is connected to each input end of the plurality of optical switches in one-to-one correspondence. Each optical switch comprises two output ends. One output end is connected to the input end of the second fiber coupler directly or through a cross waveguide. The other output end is connected to the input end of the array waveguide grating directly or through a cross waveguide. The output end of the array waveguide grating is connected to the input end of the third fiber coupler. The chip can be applied to both a multi-wavelength transmission scene and a single-wavelength transmission scene.