691 results about "Insertion loss" patented technology

The invention discloses a parameter measuring device and method of an optical switch and optical communication equipment, and relates to the technical field of optical switch measurement, and the parameter measuring device of the optical switch comprises an optical path module, a signal conditioning circuit, a driving module, a signal acquisition module and an upper computer. The optical path module converts the optical signal into a current signal; the signal conditioning circuit conditions the signal into a voltage signal and amplifies the voltage signal; the driving module provides a driving signal and a synchronous triggering signal; the signal acquisition module acquires a voltage signal based on the trigger signal; the upper computer calculates performance parameters of the optical switch according to the voltage signals acquired for multiple times, wherein the performance parameters at least comprise two items of insertion loss, extinction ratio, switching time and the like; according to the technical scheme, one-key measurement of performance parameters such as insertion loss, extinction ratio, switching time, polarization-dependent loss, insertion-dependent loss and repeatability of the optical switch can be realized, meanwhile, the measurement cost of the optical switch is reduced, and the test efficiency and accuracy are improved.

The invention relates to the technical field of optical communication equipment testing, in particular to an integrated optical module multi-parameter testing system and method.The method comprises the steps that a multi-channel parallel testing unit synchronously collects light spot morphology, divergence angles, insertion loss and return loss space and transmission characteristic parameters through a transmission light path and a reflection light path; the parameter collaborative analysis module performs nonlinear correlation analysis and dynamic performance threshold evaluation based on a cross-dimension correlation model; the intelligent calibration engine dynamically adjusts the test benchmark and compensation parameters according to the environment temperature and the equipment aging attenuation model; the fault diagnosis and prediction unit identifies potential defect types of the collimator, constructs a performance degradation prediction model in combination with a working state and environmental stress, and predicts a performance evolution trend according to test data; and the test report generation module automatically generates a standardized and customized dual-mode test report, a quality grade label and a performance optimization suggestion according to the prediction result and the diagnosis conclusion. Therefore, the problems of poor test precision, low test efficiency and the like in the prior art are solved.

The invention discloses an ultra-wideband RCS (radar cross section) reduction metasurface with mixed wave absorption and diffuse scattering and a wave-transparent window, and belongs to the technical field of electromagnetic metamaterials. The metasurface adopts a four-layer cascade structure and comprises a first layer of polarization conversion structure, a second layer of 2.5 D lossy structure, a third layer of Jerusalem cross-shaped lossy structure and a fourth layer of frequency selective surface structure. By loading a lumped resistor at a specific position and adopting a metal through hole interconnection technology, dual functions of radar cross section reduction in a 1-20GHz ultra-wideband and low insertion loss wave transmission in a 8-12GHz frequency band are realized. The structure of each layer adopts a highly symmetrical design and has the characteristic of polarization insensitivity, and meanwhile, by optimizing interlayer air gaps and dielectric material selection, the structure compactness is realized on the premise of ensuring the performance. The method has important application value in the aspect of integration of stealth equipment and a communication system.

A high-speed transmission circuit comprises, as part of a signal path, a connector pin disposed on a pad that comprises an unused pad region. The unused pad region is not considered part of the signal path but is part of a resonant sub-circuit. In various embodiments, by properly adjusting the dimensions of the pad region and other structures in the high-speed transmission circuit, resonant frequencies of the sub-circuit are shifted to a frequency range that is outside of the frequency range of interest in the signal path, thereby, reducing insertion loss and increasing signal integrity without compromising mechanical stability.

The invention relates to the technical field of insertion loss test, and discloses a spring force control insertion loss test probe device which comprises a mounting seat, an elastic probe assembly and a fine adjustment assembly. A supporting frame is arranged at the bottom of the mounting base, the elastic probe assembly is located below the mounting base, the elastic probe assembly is connected with the supporting frame, the height of the elastic probe assembly is adjustable, the fine adjustment assembly is located on one side of the probe assembly, one end of the fine adjustment assembly is connected with the elastic probe assembly, and the fine adjustment assembly is used for adjusting the elastic value of the elastic probe assembly. The optimal contact pressure can be accurately set according to the characteristics of different circuit boards, poor contact caused by too small pressure or needle mark damage caused by too large pressure is avoided, the same set of device can adapt to the test pressure requirements of different circuit boards, and the problem that the fixed elastic K value cannot be adjusted, and consequently the needle mark difference between different boards is large is solved.

The invention discloses a thin-film barium titanate electro-optical switch unit based on a composite electrode and an array thereof. The optical switch unit comprises a first waveguide optical fiber coupling module, a second waveguide optical fiber coupling module, an optical beam splitting module, an electro-optical phase shift region, an optical beam combining module, a third waveguide optical fiber coupling module and a fourth waveguide optical fiber coupling module. Wherein the composite electrode of the electro-optic phase shift region is composed of a metal electrode and a transparent conductive layer, the electrode is closer to the waveguide by utilizing the transparent characteristic of a transparent conductive material, the coupling of a light field and an electric field is effectively enhanced, and the extinction ratio is improved. Meanwhile, a barium titanate film with a high electro-optical coefficient is adopted as a waveguide material, and the performance is further optimized, so that the electro-optical switch unit has the excellent characteristics of low-voltage driving, high extinction ratio, low insertion loss and small size.

Here we incorporate waveguide filters into the design of wavelength division multiplexing (WDM) components. Conventionally, such designs are not considered because waveguide filters provide high back-reflection for any wavelengths they don't pass, and such back-reflections are typically intolerable. In this work, this back-reflection problem is alleviated by co-design of a WDM splitter and the waveguide filters such that the design of the WDM splitter accounts for the back-reflections provided by the waveguide filters. This can be regarded as a design that passively routes back-reflections at splitter outputs to the appropriate splitter outputs. Such designs can be obtained by numerical minimization of a cost function, e.g. a cost function that penalizes insertion loss and input back-reflection.

The invention belongs to the technical field of microwave communication, and relates to a coaxial double-stop-band filter, which comprises an inner conductor, an outer conductor, an insulating medium body, a signal input port and a signal output port, and is characterized in that the inner conductor is coaxially sleeved in the outer conductor, and the insulating medium body is positioned between the inner conductor and the outer conductor; two ends of the inner conductor are respectively connected with signal connecting ends of the signal input port and the signal output port; the outer conductor comprises a metal cylinder, the two ends of the metal cylinder are fixedly connected with the signal input port and the signal output port respectively, two defected ground structures which are symmetrically distributed relative to the central plane of the outer conductor are arranged on the metal cylinder, and each defected ground structure comprises a first gap and three second gaps which are arranged in parallel at intervals. The length direction of the second gaps is parallel to the axial direction of the metal cylinder, and the three second gaps are communicated through the first gap. The dual-band interference suppression performance is excellent, the passband insertion loss is low, the structure is novel, the power capacity is large, and processing is easy.

The invention provides a multi-core optical fiber tunable structure and a preparation method thereof, and relates to the technical field of photonic devices. The multi-core optical fiber tunable structure comprises a fan-in and fan-out module, a section of multi-core optical fiber and at least two Fabry-Perot interference cavities; the physical cavity lengths of the at least two Fabry-Perot interference cavities are different from each other; the multi-core optical fiber is provided with a first end face and a second end face, and the multi-core optical fiber comprises at least two fiber cores; the at least two Fabry-Perot interference cavities and the at least two fiber cores are arranged in a one-to-one correspondence manner; each Fabry-Perot interference cavity comprises a first reflecting surface and a second reflecting surface; and the first reflecting surface is an end surface of the fiber core corresponding to the Fabry-Perot interference cavity at the second end surface of the multi-core optical fiber. On the basis, the problems that an existing discrete integrated multi-channel tuning structure is complex in structure, high in insertion loss, low in reliability and high in cost and packaging difficulty are solved.

The invention discloses a mechanical non-resonant one-bit phase electromagnetic reflection metasurface unit, and belongs to the field of artificial electromagnetic materials. The unit comprises a non-resonant electromagnetic structure and a mechanical driving device. The non-resonant electromagnetic structure comprises a dielectric layer, an air layer and an adjustable metal backboard from top to bottom; the mechanical driving device adopts a bidirectional self-holding electromagnet, a screw rod of the bidirectional self-holding electromagnet is connected with the metal back plate, the back plate is driven to be switched between two preset positions through forward / reverse pulse current, the thickness of an air layer is accurately adjusted, and therefore one-bit dynamic switching of a reflection phase between 0 degree and 180 degrees is achieved through propagation phase accumulation. In the 5G millimeter wave frequency band of 20 GHz to 29.5 GHz, the reflection coefficients of the two states are both larger than 0.99, the phase difference is stabilized within 180 degrees + / -20 degrees, and good robustness is achieved for mechanical displacement deviation. The unit has the advantages of zero static energy consumption, low insertion loss, wide bandwidth, simple structure and simple control, and is suitable for a low-power-consumption intelligent reflecting surface and a dynamic beam forming system.

The invention discloses a W-band switching line MMIC phase shifter based on an aligned CNT Schottky diode. The phase shifter comprises a substrate, a radio frequency input port, a radio frequency output port, two transmission paths with different physical lengths, a switch selection network and a direct current bias circuit. Wherein the switch selection network adopts an aligned carbon nanotube Schottky diode and is configured at the input end and the output end of the transmission path. Complementary control voltage is applied through the direct-current bias circuit, the switch selection network is driven to enable the selected paths to be conducted at the two ends at the same time and the unselected paths to be cut off at the two ends at the same time, and therefore discrete switching of phases is achieved. The high-frequency characteristic of the aligned carbon nanotube device is combined with the double-end complementary selection topology, so that the problem that the amplitude imbalance and the phase precision are difficult to consider at the W wave band is effectively solved, the signal leakage and the parasitic resonance of a non-conducted branch are remarkably inhibited, and the low-insertion-loss high-isolation low-insertion-loss high-isolation low-insertion-loss high-isolation low-insertion-loss high-isolation low-insertion-loss high-isolation low-insertion-loss high-isolation low-insertion-loss high-isolation low-insertion-loss low

The application provides a multi-core optical fiber tunable structure and a preparation method thereof, and relates to the technical field of photonic devices. The multi-core optical fiber tunable structure comprises a fan-in fan-out module, a section of multi-core optical fiber and at least two Fabry-Perot interference cavities; the physical cavity lengths of the at least two Fabry-Perot interference cavities are different from each other; the multi-core optical fiber has a first end face and a second end face, and the multi-core optical fiber comprises at least two fiber cores; the at least two Fabry-Perot interference cavities are arranged in one-to-one correspondence with the at least two fiber cores; each Fabry-Perot interference cavity comprises a first reflecting face and a second reflecting face; the first reflecting face is an end face of the fiber core corresponding to the Fabry-Perot interference cavity at the second end face of the multi-core optical fiber. Based on this, the application solves the problems of complex structure, high insertion loss, low reliability, high cost and high packaging difficulty of the existing discrete integrated multi-channel tuning structure.

The application belongs to the technical field of electromagnetic materials, and provides a design method and system of a conical surface tunable frequency selective surface with stable performance. According to the performance evolution law of the FSS under the conical surface conformal transformation, the FSS period shape and arrangement mode are determined. Whether the geometric parameter value of the optimized conical surface tunable frequency selective surface structure meets the set target IL value is judged. If the geometric parameter value of the optimized conical surface tunable frequency selective surface structure does not meet the set target IL value, the geometric parameter value of the conical surface tunable frequency selective surface structure is redesigned according to the insertion loss improvement strategy. The proposed curved surface TFSS design process has low IL, high conformality and wide angle domain stability.

The invention belongs to the technical field of optical calculation, and particularly relates to an intensity-phase mixed silicon-based photon modulator. According to the hybrid silicon-based photon modulator, a PIN micro heater formed by ion implantation is integrated on two arms of a Mach-Zehnder interferometer or a micro-ring resonator, and a phase change material and a protective layer are deposited in a window above the micro heater; electric pulses are applied to metal electrodes at the two ends of the micro heater to drive local reversible crystalline and amorphous transformation of the phase change material, and phase modulation of passing optical signals is achieved; meanwhile, constant voltage signals are applied to the two ends of the PIN micro heater, and intensity modulation is generated on passing optical signals through the carrier absorption effect. The two modulation modes are mutually independent and do not interfere with each other, and two groups of independently variable weight values can be stored in the device. The hybrid silicon-based photon modulator can be used in a large photon neural network, high-speed and high-parallelism convolution operation is carried out, and the overall end-to-end insertion loss of a chip is reduced.

The present disclosure relates to a scheduling method and device of physical resource module, a base station and a computer readable storage medium. The method comprises: obtaining physical resource module (PRB) affected by filter insertion loss and specific loss value of each PRB; obtaining channel performance of a terminal; and assigning PRB to the terminal according to the specific loss value of each PRB and the channel performance of the terminal. The method of the present disclosure can realize scheduling of physical resource module.

Optical networks and methods associated with optical networks for verifying network continuity. A method for verifying network continuity includes providing a fiber Bragg grating (FBG) device at a cable associated with a network, wherein the FBG device is configured to reflect a λ1 wavelength; sending an optical test signal into the cable from a location upstream of the FBG device, the optical test signal having a λ1 wavelength; and detecting a reflected signal associated with the λ1 wavelength to verify network connectivity to the FBG device and measure network insertion loss.

The utility model discloses a broadband bridge, which comprises a first input port, a first output port, an isolation output port, a coupling output port, a front-stage coupling branch knot, an intermediate-stage coupling branch knot, a final-stage coupling branch knot, a dielectric layer and a metal layer, the metal layer is provided with a gold bonding wire, a microwave input transmission branch, a first microwave output transmission branch, a second microwave output transmission branch, an isolation port output branch and two independent microstrip lines. Three-stage coupling is adopted, namely, the front-stage coupling branch knot is connected and coupled with the last-stage coupling branch knot through the microstrip line, and the middle-stage coupling branch knot is connected and coupled with the independent microstrip line six-line through the gold bonding wire, so that the requirements of broadband 6-18GHz and low insertion loss are met, the standing wave characteristic is improved, the isolation degree and the direction are good and are both smaller than-20dB, and the isolation degree and the direction are smaller than-20dB. And moreover, good amplitude-phase consistency is achieved, the amplitude is 3dB + / -0.3, the phase is 91 degrees + / -5 degrees, and the overall performance is improved.

The application discloses a kind of parameter measuring device of optical switch and method, optical communication equipment, it is related to optical switch measurement technical field, the parameter measuring device of optical switch includes optical path module, signal conditioning circuit, drive module, signal acquisition module and host computer;Optical path module converts optical signal into current signal;Signal conditioning circuit is conditioned as voltage signal and amplifies;Drive module provides driving signal and synchronous trigger signal;Signal acquisition module is based on trigger signal and collects voltage signal;Host computer calculates the performance parameter of optical switch according to voltage signal collected multiple times, and performance parameter at least includes two items in insertion loss, extinction ratio, switching time etc.;The technical scheme of the application can realize the one-key type measurement of the performance parameter such as insertion loss, extinction ratio, switching time, polarization dependent loss, insertion dependent loss and repeatability of optical switch, while reducing the measurement cost of optical switch, improve test efficiency and accuracy.

The application discloses an optical link test method and device based on optical frequency domain reflection, which comprises the following steps: measuring echo optical signals of an optical link in an initial state by using a frequency domain reflectometer to obtain a first signal; measuring the echo optical signals of the optical link after changing the function state of the optical link again by using the frequency domain reflectometer to obtain a second signal; performing fast Fourier transform on the measured first signal and second signal respectively to obtain corresponding frequency domain signals and a distance-power relationship curve; converting the same frequency band in the two frequency domain signals into time domain signals by sliding window interception; performing cross-correlation operation on the time domain signals of the two groups of signals to obtain Rayleigh scattering frequency shift; and obtaining a distance-power distribution curve by calculation in combination with a coefficient. The application can realize fast and accurate measurement and calibration of optical field amplitude and phase parameters of an integrated system from a device level to a link level, and efficiently measure return loss, insertion loss, spectrum, delay and other parameters of an optical link on a chip.

A waveguide is coupled at both ends to a microring (MRR) modulator in order to form a Mach-Zehnder interferometer out of the resulting unit. The coupled waveguide can be modulated independently from the MRR modulator itself with either an in-resonance photoconductive heater or a geometrically suitable PN junction. During modulation with an applied voltage to the coupler, an independent modulation can be applied to the MRR in order to compensate for wavelength shifting. Ideal lengths for the coupler are identified, as well as a spiral configuration to reduce the coupler's footprint on a photonic integrated circuit. The resulting device has reduced cross-talk between channels of a cascaded MRR system. A second coupler can be coupled to each MRR symmetrically so as to reduce insertion losses, allowing for an increased weight range at the drop and through ports.

The utility model discloses a top and bottom counter -lock formula optical fiber V groove belongs to optical fiber field, the top of fixed plate is provided with another fixed plate, and a plurality of optical fiber main parts are placed between fixed plate and fixed plate, the top of each fixed plate is equipped with a plurality of V type grooves that are arranged at equal intervals, the bottom of each fixed plate is equipped with limiting protrusion, and each limiting protrusion of fixed plate is embedded in the inside of each V type groove of bottom fixed plate after two fixed plates are assembled, the section of limiting protrusion is isosceles trapezoidal shape, and the bottom of limiting protrusion is equipped with arc groove, the embedded cooperation structure of limiting protrusion and V type groove is set up, so that the automatic, accurate horizontal and longitudinal positioning of top and bottom fixed plate can be realized when buckling, effectively avoid the optical fiber shearing stress that the traditional structure produces because of misplacement, significantly reduce the insertion loss, and improve the long -term mechanical stability and reliability of array.

The invention provides a phase change switch structure, an array substrate and a display device, and belongs to the technical field of semiconductors. The buffer layer is arranged on one side of the substrate; the heating resistance layer is arranged on the side, away from the substrate, of the buffer layer; the first dielectric layer is arranged on one side, deviating from the buffer layer, of the heating resistance layer; the phase change layer is arranged on one side, deviating from the heating resistance layer, of the first dielectric layer; the first signal line and the second signal line are arranged on the side, away from the substrate, of the first dielectric layer, and the first signal line and the second signal line are both connected with the phase change layer; wherein at least one conductive material layer is arranged on one side, close to the heating resistance layer, of the phase change layer or in the phase change layer. According to the phase change switch structure, the array substrate and the display device provided by the invention, the on-resistance of the phase change switch can be reduced, the switching performance of the phase change switch can be optimized, and the insertion loss of the phase change switch can be reduced.

The embodiment of the invention provides an optical modulator, a wavelength selection switch, a port-level optical switch, an optical cross connection and an optical communication system, and aims to reduce insertion loss in an optical switching process. In the optical modulator provided by the invention, an included angle is formed between a first surface of a first substrate and a second surface of a second substrate, and a liquid crystal layer is located between the first substrate and the second substrate, so that an included angle is formed between an incident light beam of a signal light beam irradiating the optical modulator and an emergent light beam emitted from the optical modulator; the first substrate is provided with a first electrode layer, the second substrate is provided with a second electrode layer, the refractive index of the liquid crystal layer is changed by adjusting the first electrode layer and the second electrode layer to generate electric fields with different intensities, the included angle between the incident light beam and the emergent light beam is further adjusted, and the signal light beam is emitted to a target output port; deflection of the signal light beams is achieved through the refraction principle, the insertion loss of the signal light beams in the optical modulator is reduced, and then the insertion loss in the optical switching process is reduced.

This invention discloses a miniaturized, wide-stopband low-pass filter design method, covering 3D model design, simulation optimization, circuit fabrication and testing, and design verification based on dielectric integrated suspension line technology. The core of the low-pass filter design is based on dielectric integrated suspension line technology. Furthermore, the core circuit of this filter employs three layers of surface-mount capacitors and a double-layer spiral inductor to reduce circuit size, while combining a honeycomb structure to extend the stopband. Compared to traditional circuit designs, the implemented filter exhibits self-encapsulation characteristics, achieving low insertion loss and an ultra-wide stopband range, providing an important basis for filter performance optimization.

The invention discloses a lumped element and acoustic resonator mixed filtering balun and radio frequency front end system, which comprises a first module, a second module, a third module, a fourth module, a fifth module, a sixth module and a seventh module, and is characterized in that the first module, the third module and the fourth module are acoustic-electric mixed modules and comprise lumped elements and acoustic resonators; the first module, the fifth module, the sixth module and the seventh module are used for forming a plurality of transmission zero points outside a passband of the filtering balun so as to enhance the selectivity and out-of-band rejection of the edge of the passband, and the second module, the fifth module, the sixth module and the seventh module are electric modules, are formed by lumped elements and are used for realizing the passband of the required filtering balun. Reflection loss caused by impedance mismatching when discrete devices are cascaded can be avoided, insertion loss of a system is remarkably reduced, the size and cost of the system are reduced, the broadband advantage of an electrical filter and the high selectivity advantage of an acoustic filter are integrated, and meanwhile the high-performance filtering balun which is miniaturized, large in bandwidth and high in selectivity is achieved.

The application provides a terahertz wave tunable waveguide type narrow-band filter and a manufacturing method thereof. The filter comprises a cavity with a rectangular structure, the upper surface and the lower surface of the cavity are low-loss metal surfaces with a periodic groove structure, a wedge-shaped protruding area is arranged in the middle of the cavity, and the two side walls are flat. The application has the advantages of simple structure, small size, low cost, easy integration, high Q value, small insertion loss, small transmission loss, and the like. The tuning of the output center frequency of the filter can be realized by adjusting the transverse position of the filter. The filter bandwidth and the transmissivity of the filter can be changed by changing the number of waveguide periods, the distance between the upper and lower flat plates, and the groove depth.

The invention provides a frequency hopping band elimination filter which comprises a coaxial resonant cavity, a metal resonant column arranged in the coaxial resonant cavity and a digital capacitor array used for frequency tuning. The digital capacitor array comprises a plurality of capacitor chip sets, each capacitor chip set comprises a plurality of capacitor chips, each capacitor chip comprises an upper electrode and a lower electrode which are oppositely arranged, the lower electrodes are directly welded on the end surfaces of the metal resonant columns, the upper electrodes are connected with bonding wires, and the bonding wires are connected with the metal resonant columns. The bonding wire is used for being electrically connected with a control circuit. The digital capacitor is connected with the metal resonance column and the control circuit in a direct welding and gold wire bonding mode, lower and more stable insertion loss is achieved in the aspect of electrical performance, and extremely high connection consistency is ensured in the aspect of mechanical reliability; and a solid physical foundation is laid for the frequency hopping stop-band filter to realize high-Q-value, high-precision and high-reliability frequency tuning in the S wave band.

The invention relates to a DMS type filter and a filtering device, the DMS type filter comprises reflecting gratings and a plurality of IDTs arranged between the reflecting gratings, and each IDT is arranged along the propagation direction of surface acoustic waves; each IDT comprises a plurality of spacing intervals, and each spacing interval is provided with interdigitals which are arranged along the propagation direction of the surface acoustic wave and are sequentially connected end to end; wherein each IDT comprises a main spacing area and a plurality of spacing adjusting areas, the spacing of the interdigitals in the main spacing area is consistent, the spacing of the adjacent interdigitals in each spacing adjusting area monotonically changes in the form of a quadratic power function along the direction far away from the main spacing area, and the variation amplitudes of the spacing of the adjacent interdigitals in different spacing adjusting areas are different. By adjusting the distance between the interdigitals one by one, the design freedom degree is remarkably improved, and therefore the purposes of reducing insertion loss, improving the standing-wave ratio, expanding the bandwidth and the like are achieved so as to adapt to different use scenes, and the application range is widened.

The application discloses a V-band six-way waveguide power combiner and belongs to the technical field of satellite communication. The application comprises a shielding box main body, wherein a straight-through input port, a branch waveguide three-way power divider, an input waveguide cavity, an input co-planar magic T, a waveguide-microstrip-waveguide conversion structure, an output co-planar magic T, an output waveguide cavity, a branch waveguide three-way power combiner and a straight-through output port are arranged in the shielding box main body from left to right. An isolation waveguide cavity is arranged on the front and back sides of the input port of the branch waveguide three-way power divider and on the front and back sides of the output port of the branch waveguide three-way power combiner. A wedge-shaped wave-absorbing material is arranged in the isolation waveguide cavity. The shielding box main body comprises an upper box body and a lower box body, the upper box body and the lower box body are fixed through screws and form the shielding box main body. The application realizes non-binary power combination and has the characteristics of small insertion loss, wide frequency band and good isolation.

Loss measurement system in an integrated photonic circuit and associated method. The invention relates to a system (100) for measuring the absolute insertion loss ILcp ​​of a photonic circuit (20) comprising input (21) and output (22) interfaces, the system comprising a first optical fiber (1) configured to transmit the beam emitted by a light source (10) to a first connector, an injection optical fiber (2) connected to the first fiber using the first connector and configured to transmit the beam to the input interface, a collection optical fiber (3) configured to collect the beam from the output interface, a second optical fiber (4) connected to the collection fiber using a second connector and configured to transmit the beam to a detector for measuring a characterization power Pcp, the system comprising a calibration element (110) having an insertion loss ILmir,The system is configured to measure ILcp ​​insertion losses after calibration via the calibration element. Figure for the abbreviation: Fig. 1A,