1109 results about "Fiber array" patented technology

The invention relates to a light receiving end, which is characterized in that an array lens for coupling emergent light of each channel of a 45-degree optical fiber array into a corresponding channel of an array detector chip is arranged between a 45-degree total reflection surface of a V-shaped groove in the 45-degree optical fiber array and the array detector chip, and the side surface of the array lens is fixed with the side surface of a cover plate in the 45-degree optical fiber array in a bonding manner. The invention discloses an optical receiving end coupling method. The method comprises the following steps of: aligning each channel of a 45-degree optical fiber array with each channel of an array detector chip one by one in an active coupling manner; the array lens is coupled between the 45-degree total reflection surface of the V-shaped groove in the 45-degree optical fiber array and the array detector chip in an active coupling manner, so that light emitted from each channel of the 45-degree optical fiber array is coupled into the corresponding channel of the array detector chip, and when the optimal coupling position is reached, glue dispensing is performed, and the light emitted from each channel of the 45-degree optical fiber array is obtained. And the side surface of the array lens is fixed with the side surface of the cover plate in the 45-degree optical fiber array. The beneficial effects are that the optical receiving end is optimal in performance, highest in yield and low in cost.

The invention relates to the technical field of structural stress precision measurement, in particular to a distributed optical fiber sensing-based steel structure stress monitoring method, which comprises the following steps of: 1, constructing a sensing optical fiber array in a steel structure node area; 2, injecting optical pulses into the sensing optical fiber array, and synchronously collecting Brillouin frequency shift signals and Raman scattering signals of all points; 3, temperature and mechanical strain are separated based on the reference optical fiber signals, global temperature compensation is adopted for the first optical fiber set, and temperature gradient compensation along the optical fiber path is adopted for the second optical fiber set; 4, decomposing the compensated mechanical strain into multidirectional strain components according to the spatial orientation of the optical fiber, and reconstructing a three-dimensional stress field through strain component fusion; and 5, dynamically judging the damage risk according to the local stress concentration coefficient and the change rate thereof in the stress field. And through the temperature compensation technology, the influence of the environment temperature change on the strain data is eliminated, and the reliability of the monitoring result is improved.

The invention discloses an optical chip-optical fiber coupler based on a collimating grating penetrating through a substrate, which belongs to the technical field of photoelectric chips and comprises a substrate, an inverted optical chip is arranged on the substrate, and the optical chip comprises at least one optical device, an optical waveguide array for realizing input and output and a collimating grating array. The collimating grating array is provided with a gradually changing period and duty ratio, so that light output from the optical waveguide array is diffracted to the substrate through the collimating grating array and is propagated to the back surface of the optical chip as basically collimated light; an optical coupling element array is arranged at the position, corresponding to emergent light of the collimating grating array, of the back face of the optical chip to couple light to an optical fiber array. By the adoption of the structure, high-efficiency coupling of the optical chip and the optical fiber array is achieved, and compared with a common grating coupler and an edge coupler, the coupler has higher coupling efficiency and alignment tolerance, is easier to manufacture and can be widely applied to the fields of optical IO, photoelectric sealing (CPO) and the like of large-scale photoelectric integrated chips.

The invention discloses a fast neutron imaging detector and a detection system, and belongs to the technical field of ray detection, the fast neutron imaging detector comprises a wave-shifting optical fiber array, scintillators and a photoelectric conversion array, the wave-shifting optical fiber array comprises a plurality of crisscrossed wave-shifting optical fibers, and gaps among the wave-shifting optical fibers are filled with the scintillators; and each photoelectric detector in the photoelectric conversion array is correspondingly coupled with the wave-shifting optical fiber. The detection efficiency of fast neutrons is effectively improved by increasing the thickness of the sensitive area of the detector, meanwhile, the collection efficiency of photons generated in the sensitive area of the detector can be remarkably improved through the crisscrossed wave-shifting optical fiber array, and the position information of a detection event can be accurately obtained in combination with a gravity center positioning method. Compared with a traditional fast neutron imaging detector based on combination of a camera and a conversion screen, the imaging detector has the advantages of fast response, large sensitive area, high detection efficiency and the like.

A method of assembling an optical device including: providing a photonic integrated circuit including a plurality of vertical-coupling elements disposed along a main surface of the photonic integrated circuit; attaching an optical subassembly to the photonic integrated circuit; removably connecting a fiber connector to a ferrule frame, in which the fiber connector is attached to an array of optical fibers; aligning the ferrule frame to the optical subassembly using an active alignment process; and securely connecting the ferrule frame to the optical subassembly after the active alignment process.

The invention relates to an ultraviolet laser focusing ionization fluid disinfection system and a disinfection machine, and the system comprises a fluid channel which is provided with a fluid inlet, a fluid outlet and a disinfection cavity, the disinfection cavity is internally provided with at least one group of optical fiber arrays, and the light emitting end of each optical fiber array is full of a cross section for fluid circulation; the output end of the ultraviolet laser emitter is connected to the input end of the optical fiber array, a focusing element is arranged at the light emitting end of each optical fiber, and ultraviolet laser is output by the optical fiber array and forms an ionization area in the disinfection cavity after passing through the focusing elements. An ultraviolet laser focusing ionization technology is adopted, an ionization focus with high energy density is formed, the ionization focus not only directly acts on fluid molecules at the focus, but also excites fluid in a peripheral area through the ionization effect, a wide ionization area is formed, harmful substances in the fluid are decomposed into harmless low-molecular compounds, and therefore the fluid concentration is improved. The efficient and thorough disinfection on the fluid is realized.

An integrated optical fluid interrogation module is provided. An integrated optical fluid interrogation module of interest comprises: a flow cell comprising an optically accessible flow channel for transporting particles in a flow stream; a linear fiber array integrated with the flow cell and including a plurality of non-circular core fibers, each non-circular core fiber configured to project excitation wavelength light onto a corresponding focus within the flow cell; and a plurality of fiber optic light transmitter couplers for operably attaching the plurality of light sources to the linear fiber array. Flow cytometers including the subject integrated optical fluid interrogation module and methods of using the same are also provided.

The invention discloses an optical fiber array automatic coupling mounting device which comprises a machine table, a coupling mechanism, a power supply mechanism, an optical feedback mechanism and a clamp mechanism capable of horizontally moving relative to the coupling mechanism are arranged on the machine table, and the coupling mechanism comprises a multi-axis degree-of-freedom adjusting frame. The front end of the multi-axis degree-of-freedom adjusting frame is provided with a clamping assembly used for clamping the optical receiving end of the optical fiber array. The optical feedback mechanism is provided with a sensor used for detecting the luminous flux of the optical fiber array light receiving end on the tube shell in the tube shell placing groove in the coupling process. The invention also discloses a coupling mounting method. By adopting the specific jig, the optical fiber arrays and the tube shells are clamped at one time, automatic coupling mounting of the optical fiber arrays and the tube shells can be carried out in sequence, the mounting efficiency is improved, meanwhile, the mounting position is adjusted for multiple times in a mode of combining visual positioning and luminous flux detection, and the mounting precision is ensured.

The invention provides an optical cross system based on silicon-based liquid crystal and a control method, and relates to the field of optical elements, and the optical cross system comprises an optical fiber array, a micro lens array, a collimating lens, a polarization conversion module, a dispersion element, a focus lens group and a liquid crystal spatial light modulator. Optical signals are coupled through the micro-lens array, a divergence angle is compressed, and parallel light beams are formed through the double-agglutination collimating lens; the polarization conversion module separates the light beam into P / S polarized light and unifies the polarization state; the dispersion element separates light beams according to wavelength space, and the focus lens group forms an elliptical Gaussian light spot on the liquid crystal spatial light modulator; the liquid crystal spatial light modulator divides a light spot into a plurality of independent control areas in the long-axis direction, and single-wavelength multi-port output, power proportion regulation and control and monitoring signal extraction are achieved by dynamically modulating the reflection phase of each area. The control method comprises the steps of optical path processing, regionalized phase modulation and real-time monitoring feedback. According to the invention, flexible routing, power balance and lossless monitoring of wavelength channels can be realized.

The invention relates to a tool clamp for an optical fiber array and coupling packaging equipment for the optical fiber array, the tool clamp for the optical fiber array comprises a base, a first clamping device, a second clamping device and a third clamping device, the first clamping device is used for clamping a circuit board, and the second clamping device is used for clamping the circuit board; the first clamping device is used for clamping an optical fiber array, the second clamping device is used for clamping an optical fiber array, the first clamping device, the second clamping device and the third clamping device are sequentially arranged in the length direction of the base, and the third clamping device is slidably arranged on the base and can slide in the length direction of the base. The third clamping device is used for clamping an adapter, and the adapter is connected with the optical fiber array through a tail fiber; the optical fiber array can move to a coupling position on the circuit board under the action of external force, and the optical fiber array can pull the adapter and the third clamping device to slide in the direction close to the second clamping device through the tail fiber in the moving process.

The invention provides a pluggable optical interface structure, and relates to the technical field of optical device packaging, and the pluggable optical interface structure comprises a substrate which is at least provided with an optical chip, and the optical chip is connected with the substrate; and the optical fiber array unit is connected with the optical chip in a positioning and plugging manner, so that the optical fiber array unit is conducted with the optical chip. The optical fiber array unit and the optical chip are connected in a positioning and plugging manner, so that additional structures and steps required by active coupling such as position adjustment of the optical fiber array unit and the optical chip are not required, and the optical fiber array unit and the optical chip can be aligned in a high-precision and passive coupling manner in a positioning and plugging manner; as a structure required by active coupling does not need to be additionally arranged, the packaging process can be greatly simplified, product production and maintenance of use links are facilitated, the production operation efficiency is effectively improved, the product cost is reduced, and the competitiveness of the product is further enhanced.

Disclosed is a facet coupling fanout device including a body, a first optical coupling side, and a second optical coupling side. The body defines a plurality of multi-channel waveguides therein. The first optical coupling side optically couples the plurality of multi-channel waveguides to a plurality of waveguide cores of a photonic integrated circuit (PIC). The a second optical coupling side optically couples the plurality of multi-channel waveguides to optical fibers of a fiber array unit (FAU). The first optical coupling side defines a first pitch P1 between the plurality of multi-channel waveguides and the second optical coupling side defines a second pitch P2 between the plurality of multi-channel waveguides where P2>P1. The first pitch P1 and the second pitch P2 define a pitch ratioR=P2P1.

The invention belongs to the technical field of gas detection, and particularly relates to a multi-component gas detection device and a detection method.The multi-component gas detection device is characterized in that according to components of detected gas, a laser driver drives a laser array to emit light with different modulation frequencies and multiple wavelengths, the light is changed into parallel light after passing through an optical fiber array and a micro-lens array, and the parallel light is transmitted to a gas detector; after gas to be detected is absorbed and reflected by a diffuse reflection surface, reflected light passes through a lens and a dichroscope to be converged, light with long wavelength and light with short wavelength respectively enter photoelectric detectors with corresponding wave bands, the photoelectric detectors convert optical signals into electric signals and filter the electric signals, and the filtered signals to be detected are transmitted into a digital lock-in amplifier to be processed in parallel. And demodulating second harmonics and first harmonics of different gases, and calculating the concentration of each to-be-detected gas through a calculation unit. According to the invention, simultaneous detection of multi-component gas concentration can be realized.

The utility model relates to a silicon optical chip compatible with 400G DR4 and 400G FR4. Four first light inlet waveguides are respectively coupled with four light outlet waveguides through four MZ modulators, and two second light inlet waveguides are respectively coupled with input ends of two 1 * 2 equal-ratio optical splitters. And four output ends of the two 1 * 2 equal-ratio optical splitters are respectively coupled with input ends of the four MZ modulators. According to the 400G DR4 silicon optical module, two light emitting assemblies are respectively coupled with two second light inlet waveguides, and a four-channel optical fiber array is coupled with four light outlet waveguides. According to the 400G FR4 silicon optical module, four light emitting assemblies are respectively coupled with four first light inlet waveguides, and an AWG device is coupled with four light outlet waveguides. The silicon optical chip has the beneficial effects that the silicon optical chip can be compatible with the application of a 400G DR4 silicon optical module and a 400G FR4 silicon optical module, so that the cost of a single silicon optical chip is reduced.

The invention relates to a linear array push-broom imaging spectrum system based on an optical fiber device, which comprises a spectrograph, an objective lens and an optical switch, and is characterized in that the view field of a telescope objective is fully utilized, and a second optical fiber of a linear array is coupled to the focal plane of the objective lens to fill the one-dimensional view field of the objective lens. The second optical fiber is connected with the optical switch, the on-off of the sub optical fibers corresponding to different view fields is rapidly controlled through the optical switch, and the flight motion of the aerial carrier platform is matched, so that rapid time-sharing detection based on different view fields of the same high-speed spectrometer can be realized, and an imaging spectrum detection effect similar to push-broom imaging detection can be realized. Compared with a conventional linear array sweep imaging spectrum system, the optical fiber array and the optical switch device are adopted to replace a sweep mechanism, sweep mechanical moving parts are not needed, the size and the weight of the imaging spectrum system are greatly reduced, and the influence on the flight stability of an aerial carrier platform is extremely small.

The invention discloses an integrated optical diversity receiving device, solves the problem of high power consumption when the influence caused by phase distortion and light beam pointing error is corrected in the existing free space optical communication, and belongs to the field of optical communication. The method comprises the steps that free space light focused by a lens is received by a multimode / few-mode optical fiber; the multi-mode light beams received by the multimode / few-mode optical fiber enter the photon lantern; the photon lantern is coupled to the single-mode fiber array after mode demultiplexing; each light beam in the single-mode fiber array enters a polarization beam splitting rotary combiner through an edge coupler; the polarization beam splitting rotation combiner performs transverse electric wave (TE) and transverse magnetic wave (TM) mode separation on the entered light beam, then rotates the separated TM polarization state light to a TE polarization state, combines the rotated TE polarization state light and the separated TE polarization state light, and then enters the MZI network; the MZI network is used for realizing optical coherent beam combination; a control circuit controls the merging of the light beams in the MZI network.

The invention relates to a packaging structure and packaging method for an optical module and an optical chip, and the packaging structure comprises a receiving end assembly, a stepped metal heat sink, and a silicon-based optical interconnection assembly which is pasted on the stepped metal heat sink. The silicon-based optical interconnection assembly comprises a laser, a silicon light beam splitter, a lens group, a light transmission compensation gasket, a silicon light modulator and an optical fiber array; coplanar coupling is formed between the laser and the silicon light beam splitter. The silicon light beam splitter and at least part of the collimating lens in the lens group are fixed on the light transmission compensation gasket; the optical fiber array and the silicon light modulator realize waveguide matching in an active coupling mode; the silicon light modulator and the receiving end assembly are separately arranged at least at a preset interval, and the optical fiber array and / or the receiving end assembly are / is covered with a metal isolation cover. According to the invention, the problems of high cost of multiple light sources, easy pollution of an open light path and yield bottleneck caused by low-reliability glue in the prior art are solved, and finally, a packaging scheme which is compact in structure, stable in process and high in mass production is formed.

The embodiment of the invention particularly relates to a dosage monitoring device based on a scintillation fiber array and a beam control device. In the dose monitoring device, when a beam passes through a two-dimensional scintillation optical fiber array detector, a plurality of first scintillation optical fibers arranged in parallel in a first scintillation optical fiber layer and a plurality of second scintillation optical fibers arranged in parallel in a second scintillation optical fiber layer are excited to emit scintillation fluorescence, and the scintillation fluorescence is transmitted along the optical fibers and received by a photoelectric detection unit; and the photocurrent signal is further converted into a voltage pulse signal by the current-voltage conversion unit, and the output dose information and the radiation field dose distribution information of the electron accelerator can be further obtained according to the voltage pulse signal.

The invention discloses a multi-optical fiber bundle imaging mode dimension space conversion plasma spectrum analysis system, which is characterized in that a two-dimensional optical fiber array comprising M * N optical fiber micropores is arranged on an optical fiber area array, a one-dimensional optical fiber array comprising M * N optical fiber micropores is arranged on an optical fiber linear array, and an optical fiber surface is connected by adopting M * N optical fibers according to a preset connection relation, the two-dimensional optical fiber array is converted into the one-dimensional optical fiber array, the optical grating disperses light transmitted by the optical fiber linear array, then the light is focused by the imaging lens and then is subjected to optical imaging by the CCD detector, and the spectral data conversion module converts a spectral image into a spectral data graph of each optical fiber channel. According to one-to-one correspondence of optical fibers in the two-dimensional optical fiber area array and the one-dimensional optical fiber linear array, the distribution state of elements in the plasma is reconstructed, and multi-optical-fiber sample element content detection is achieved.

A hollow core fiber array unit includes hollow core fibers each having a terminal end and an adapter that includes grooves. Each groove receives the terminal end of one of the hollow core fibers. The terminal end of the hollow core fibers is spaced from an end face of the adapter. The hollow core fiber array unit includes a spot size converter coupled to the end face of the adapter. The spot size converter includes a plurality of waveguides that correspond to the hollow core fibers. Each waveguide extends from an input at an input end of the spot size converter that is coupled to the end face of the adapter to an output at an opposite output end of the spot size converter. The input of each waveguide includes a first mode field diameter that corresponds to the hollow core fibers and the output includes a second mode field diameter.

The invention discloses a driving circuit of a light-emitting fiber array and light-emitting fabric equipment, and relates to the technical field of light-emitting fabric equipment, the driving circuit comprises a power supply module, a control module, a boost circuit, an H-bridge circuit and a switch array, and the switch array is connected with the light-emitting fiber array; the power supply module is connected with the boost circuit and the control module. The boost circuit is connected with the H-bridge circuit. The boost circuit is connected with the H-bridge circuit and is used for boosting input voltage to target voltage and inputting the target voltage into the H-bridge circuit; the control module is connected with the H-bridge circuit and is used for driving the H-bridge circuit to generate positive and negative alternating voltage according to the voltage inversion frequency corresponding to the target overall brightness; and the H-bridge circuit is connected with the luminous fiber array and is used for outputting positive and negative alternating voltage to the luminous fiber array, so that the luminous fiber array emits light according to the target overall brightness. The technical problem that an existing driving circuit for the light-emitting fiber array is low in reliability is solved.

The invention discloses a multi-photon optical fiber array endoscopic imaging device and method based on hollow spiral scanning, and belongs to the technical field of biological imaging. The device comprises a laser collimation and beam expansion module, a pulse chirp module, a light beam switching module, an endoscopic detection module and a fluorescence acquisition module. The light beam switching module comprises an optical switch and an optical fiber array composed of at least two low-group-velocity dispersion single-mode optical fibers. The endoscopic detection module drives the optical fiber array to execute hollow spiral scanning through the resonance driver, the track starting point is not located at the view field original point, and central dense sampling is avoided. According to the method, the optical fibers are switched through the optical switch, so that the optical fibers execute spatial non-coincident hollow spiral scanning, multi-photon signals such as fluorescence, second harmonic and fluorescence lifetime are acquired, a central hole is complemented through image reconstruction and fusion, and a complete field imaging result is obtained. Light damage of the central area is remarkably reduced, the imaging resolution uniformity is improved, the fused image is true and reliable based on physical sampling, and the system stability is high.

The invention provides a packaging structure, an optical module and an optical system, the packaging structure comprises an optical fiber unit and a chip unit, the chip unit comprises a photon chip and a chip cover plate, the photon chip is buckled with the chip cover plate, a spot size converter is arranged in the photon chip, and the spot size converter is composed of a cantilever beam waveguide and a first groove; the optical fiber unit comprises an optical fiber, a bottom plate and an optical fiber cover plate bottom plate; the waveguide is coupled with the optical fiber; wherein a first bonding part is arranged between the chip cover plate and the bottom plate, and a second bonding part is arranged between the photon chip and the optical fiber cover plate; or a first bonding part is arranged between the chip cover plate and the optical fiber cover plate, and a second bonding part is arranged between the photon chip and the bottom plate. In the packaging structure, a chip cover plate is arranged on a photon chip to form a chip unit, so that the bonding area between the chip unit and an optical fiber array is increased, the mechanical stability of the packaging structure is improved, and alignment of waveguides in the photon chip and optical fibers in the optical fiber array is realized.

The utility model relates to a silicon optical chip, which comprises a 2 * 2 coupler and two 1 * 2 couplers which are integrated in the chip, and a light inlet waveguide, four light outlet waveguides and a test waveguide which are integrated in the chip and located on the same side, and the four light outlet waveguides and the test waveguide are distributed side by side in a mode of inclining by 8 degrees. Two input waveguides of the 2 * 2 coupler are respectively connected with the light inlet waveguide and the test waveguide, two output waveguides of the 2 * 2 coupler are respectively connected with input waveguides of the two 1 * 2 couplers, and four output waveguides of the two 1 * 2 couplers are respectively butted with the four light outlet waveguides one by one. The 400G DR4 silicon optical module comprises the silicon optical chip. The beneficial effects are that one optical fiber array can be reduced during testing, the testing efficiency is effectively improved, and mass production testing is facilitated.

According to the flexible array type external field program control nerve stimulation device, the preparation method and the application thereof, the flexible array type external field program control nerve stimulation device comprises a flexible substrate layer and a stimulation response fiber array layer, and the stimulation response fiber array layer is prepared from a functional material capable of converting external field energy such as ultrasound, magnetism and light into electric energy; the flexible substrate layer with high flexibility is adopted, so that the flexible substrate layer can be matched with the surface of a nerve target tissue in a conformal manner; the stimulation response fiber array layer integrated on the flexible substrate layer in an array arrangement mode can meet the stimulation spatial resolution of neuron and even sub-neuron precision, has the characteristics of excellent flexibility, biocompatibility, passivity and wireless performance, can provide nerve electrical stimulation signals with high spatial resolution, and can be applied to the field of nerve electrical stimulation. The high-resolution nerve electrical stimulation device can be in conformal fit with the irregular surface of nerve soft tissue, and is suitable for high-resolution nerve electrical stimulation of different parts such as eyes, the brain and peripheral nerves.

The invention relates to an intelligent detection method based on an optical fiber array, and the method comprises the steps: switching the multi-polarization-state light source input of the optical fiber array, and synchronously collecting the output polarization state parameters of each optical fiber; calculating a deviation value of the output polarization state parameter based on the polarization reference value, and when the deviation value is greater than a self-adaptive threshold value, marking the optical fiber array associated region as an abnormal region; identifying a polarization state change mode of the abnormal area, and positioning an abnormal position; generating a damage detection report through the damage confidence scoring model; according to the invention, through switching and synchronous acquisition of the multi-polarization-state light source, dynamic monitoring of the global polarization state of the optical fiber array is realized, and easy-to-omit weak signal change in single-polarization-state detection is captured; automatic marking of abnormal areas and intelligent identification and matching of polarization state change modes are achieved through comparison of the polarization deviation value and the self-adaptive threshold value, automatic classification of damage types is achieved, and the effect of improving the detection precision and reliability based on the optical fiber array is achieved.

The invention discloses a three-color plastic scintillation optical fiber array and a preparation method and application thereof, and belongs to the technical field of plastic scintillation optical fiber arrays. The three-color plastic scintillation optical fiber array is composed of plastic scintillation optical fibers emitting red light, green light and blue light, and the three-color plastic scintillation optical fibers are arranged according to the color rule of a set pattern to form the three-color plastic scintillation optical fiber array. The optical fiber array is simple in structure, low in manufacturing cost and capable of being popularized and applied on a large scale. The three-color plastic scintillation optical fiber array has the characteristics of miniaturization, long-distance transmission and electromagnetic interference resistance, and is very suitable for radiation detection in a complex environment. Meanwhile, the optical fiber array covers red, green and blue wavelength bands, can be matched with more photoelectric detectors with different wavelength sensitivities, can realize high-resolution and long-distance imaging when being applied to X-ray imaging, can form different patterns under X-ray irradiation, and can be widely applied to the fields of radiation detection, industrial detection, medical imaging and the like.

The invention provides a packaging structure, an optical module and an optical system. The packaging structure comprises a photon chip, an optical fiber array and a substrate. Wherein the photon chip is internally provided with a spot size converter, and the spot size converter is composed of a cantilever beam waveguide and a first groove; the optical fiber array comprises optical fibers, a bottom plate and a cover plate, the bottom plate comprises a second groove, the second groove is used for accommodating the optical fibers, and the cover plate is buckled with the bottom plate; wherein the photon chip is arranged on the upper surface of the substrate, the bottom plate or the cover plate is arranged on the upper surface of the substrate, and the cantilever beam waveguide is in coupling connection with the optical fiber. In the packaging structure, the photon chip and the optical fiber array are arranged on the upper surface of the substrate together, and an additional supporting piece is avoided, so that the mechanical stability of the packaging structure can be ensured, the change of stress near the cantilever beam waveguide caused by temperature change, displacement, external force application and the like in the packaging structure is reduced, and low-stress packaging is realized.

A fiber array unit (FAU) and the method for forming the same are provided. The FAU includes a substrate, fiber grooves, and light guiding elements. The substrate has a first region and a second region which are continuous and connected. The fiber grooves are formed in the first region. The light guiding elements are formed in the second region. The fiber grooves are aligned with the light guiding elements, respectively.

A fiber array unit (FAU) structure and the method for forming the same are provided. The FAU structure includes a FAU, a passive optical component structure, and a carrier board. The FAU includes a fiber holder holding optical fibers. The passive optical component structure includes a reflective layer and a lens layer. The reflective layer includes reflectors adjacent to the optical fibers. The lens layer includes silicon lenses adjacent to the reflectors. The carrier board is configured to support the FAU and the passive optical component structure. The FAU and the passive optical component structure are adjacent to each other. The lens layer is located between the reflective layer and the carrier board.