46 results about "Laser cooling" patented technology

The invention relates to the field of cooling-water machines, and particularly discloses highly-integrated laser cooling-water equipment which comprises a laser cooling-water machine. The graded cold water circulating device is connected with the top side of the laser water chiller; the flow dividing pipe assembly is connected with the grading cold water circulating device; the cooling liquid master control device is connected with the laser water chiller; an intelligent adjusting module; the staged cold water circulation device comprises a stepped cold water tank assembly and a water tank assembly, a middle driving assembly; the cooling liquid master control device comprises a liquid inlet control assembly and a liquid outlet control assembly, wherein the liquid inlet control assembly is connected with the laser cooling-water machine; the liquid discharge control assembly is connected with the laser water chiller; through cooperative work of the stepped cold water tank assembly, the flow dividing pipe assembly and the like, the cooling liquid flow can be distributed according to needs, and multi-assembly cooperative control is achieved through the intelligent adjusting module. The inclined arrangement and the water disturbing plate accelerate heat removal, and the liquid inlet and outlet control assembly facilitates replacement of cooling liquid.

This invention belongs to the technical field of laser chiller control methods, and particularly relates to a laser chiller control temperature difference adaptive correction method. It includes the following steps: detecting laser operating parameters based on the flow rate-temperature difference method and calculating waste heat; based on the calculated waste heat, detecting the waste heat at the start of each laser operating cycle and plotting a waste heat change curve over time; selecting a heat balance line based on the change curve and calculating the control temperature difference; and adjusting the chiller's cooling capacity. This laser chiller control temperature difference adaptive correction method optimizes the chiller's cooling capacity output by using the laser's waste heat change as a condition, thereby optimizing the cooling water temperature circulation. It utilizes the cooling water's cooling capacity circulation to achieve water temperature balance optimization, reduce water temperature fluctuations, and determine the control temperature difference. This solution is simple, efficient, and highly practical, and can improve problems such as the mismatch between refrigeration and cooling demands in traditional chillers, thus improving system efficiency.

The invention discloses a double-light-path high-frequency pulse laser processing device, relates to the technical field of high-frequency pulse laser processing, and aims to solve the problem that local overheating is prone to occurring in the high-frequency pulse laser processing process. The double-light-path high-frequency pulse laser processing device comprises a workbench, two pulse controllers are arranged above the workbench, and laser heads are arranged at the front ends of the pulse controllers; and laser cooling assemblies are arranged on the outer sides of the pulse controllers and comprise coolers, the coolers surround the outer sides of the laser heads, arc-shaped sliding groove plates are arranged on the outer sides of the laser heads, and the coolers are located between the laser heads and the arc-shaped sliding groove plates. The double-light-path high-frequency pulse laser processing device has the technical effects that the cooler continuously moves around the laser head and the pulse controller, the laser head and the pulse controller can be cooled in an omnibearing and uniform mode, local overheating is avoided, it is effectively guaranteed that the laser head and the pulse controller work at the proper temperature, and the service life of equipment is prolonged.

1. The name of the design product: laser engraving equipment. 2. The use of the design product: for laser engraving equipment and laser cooling device integration, can directly carve products. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The present invention discloses an ion thermometer based on a cold ion cluster, which relates to the field of temperature measurement technology and can be used for precise measurement and monitoring of ambient temperature in ultra-low temperature research. The thermometer uses a laser-cooled cold ion cluster as a temperature sensor. The motion temperature of the cold ion cluster is strongly coupled with the temperature of the gas in the vacuum chamber, and the temperature of the gas in the vacuum chamber is consistent with the ambient temperature when the temperature is balanced. By evaluating the increase in the motion temperature of the ion cluster caused by background gas collisions under different environments, the temperature of the background gas can be evaluated, thereby obtaining the measured ambient temperature. It includes a vacuum chamber, a camera, an ion trap, a metal target, a vacuum pump, an optical switch, cooling light, sputtering light, an optical fiber, a power supply and control system, an ultra-high vacuum electrode feedthrough, and an ultra-high vacuum optical fiber feedthrough; the thermometer measures the ambient temperature from a microscopic perspective and from the essence of heat exchange, has higher temperature measurement sensitivity and accuracy, and can be used for high-precision measurement and monitoring of the temperature in an ultra-low temperature environment.

This application provides a rubidium optically pumped magnetometer and its measurement method, belonging to the field of magnetometer technology. The entangled photon component includes a first laser and a nonlinear optical crystal, the nonlinear optical crystal being used to convert photons emitted by the first laser into entangled photon pairs; a rubidium atom gas cell for receiving the entangled photon pairs; a laser cooling system for cooling rubidium atoms to a Bose-Einstein condensate; and an interferometer phase detection system including a second laser, a first beam splitter, a beam combiner, and a signal processor. This application introduces entangled photons to form a quantum entangled state with rubidium atoms. The introduced entangled photons, through coupling with the rubidium atom system, form an enhanced quantum interference effect. Traditional rubidium optically pumped magnetometers are limited in measurement accuracy by quantum noise, but by introducing entangled photons, the system's measurement noise is reduced, thereby achieving higher measurement accuracy.

A method for preparing a gradient composition of a manganese-copper alloy with improved toughness belongs to the technical field of alloy preparation, and comprises the following steps: uniformly mixing copper powder and manganese powder into surface powder and core powder, and dynamically adjusting the feeding ratio of the surface powder and the core powder by a double powder feeder; performing laser sintering during the feeding process, and adjusting the manganese content in the feed by the double powder feeder for each deposited layer; after the sintering is completed, applying a strong axial magnetic field to drive Mn atoms to migrate toward the tail of the molten pool to form a composition gradient strengthening; performing sequential annealing treatment and surface nano-processing to obtain a manganese-copper alloy; forming nanocrystals and solid solution strengthening by rapid laser cooling to improve the strength of the manganese-copper alloy, and the coarse columnar crystals induced by the magnetic field provide high fracture toughness.

A system for performing sympathetic laser cooling is provided. The system includes a confinement apparatus configured to confine an object crystal that includes a qubit object and a coolant object in a cooling area. The system further includes manipulation sources configured to generate first and second manipulation signals. When the first and second manipulation signals are applied to the coolant object, the first and second manipulation signals collectively drive a sideband transition of the coolant object between a first quantum state and a second quantum state that is characterized by a red effective detuning that corresponds to at least one motional mode frequency of the object crystal. The system further includes one or more beam path systems that provide the first and second manipulation signals to the cooling area and one of the first or second manipulation signal is provided as a spatially structured optical field within the cooling area.

The invention discloses an air cooling system of a laser water chiller. The air cooling system comprises a cooling fan, a rectifying device, a compressor, a refrigerant cooling pipeline and a front evaporator refrigerant pipeline. The refrigerant cooling pipeline comprises a condenser; the front evaporator refrigerant pipeline comprises a front evaporator located in the front area. A plurality of condensation ventilation channels for airflow to flow through are formed in the condenser; the rectifying device comprises a first rectifying cavity and a second rectifying cavity which are sequentially arranged in the airflow flowing direction. The first rectifying cavity is used for weakening vortex flow caused by rotation of the cooling fan; the second rectifying cavity is used for promoting airflow to enter the condensation ventilation channel in the mode of being parallel to the extension direction of the condensation ventilation channel. The heat dissipation efficiency can be improved, the condensing pressure of the system is reduced, the exhaust temperature and the running current of the compressor are reduced, and it can be ensured that the compressor normally works in a high-temperature environment.

This application provides a Bayesian optimization-based optimization method for integral sphere diffuse reflection laser cooling, which can find the optimal parameter combination in fewer iterations, improving the efficiency of experimental parameter optimization for integral sphere diffuse reflection laser cooling. The method includes: determining the optimization parameter range for the frequency and power of the cooling light, re-pump light, and probe light; within this range, selecting at least one set of initial parameters for the frequency and power of the cooling light, re-pump light, and probe light and experimenting in an integral sphere diffuse reflection laser cooling system to obtain the cost function value corresponding to each set of initial parameters; each set of initial parameters and its corresponding cost function value constitutes an initial dataset; based on the initial dataset, using a Bayesian optimization algorithm to fit the cost function and predict the optimal parameters; conducting experiments with the optimal parameters to obtain the cost function value corresponding to the optimal parameters; subsequently determining whether the cost function value corresponding to the optimal parameters meets preset conditions, thereby determining the final optimal parameters.

The present application relates to a kind of lamp-pumped laser cooling water anti-freezing device, the anti-freezing device includes control circuit, water inlet, water outlet and drain, and the water inlet solenoid valve, constant temperature water tank, self-priming pump and three-position three-way solenoid valve connected in sequence;Water outlet, drain and constant temperature water tank form three-way;Control circuit is used to control the opening and closing of water inlet solenoid valve, constant temperature water tank, self-priming pump and three-position three-way solenoid valve;Constant temperature water tank is used to make water temperature stable in a certain range around set value;Water inlet solenoid valve is used to control the opening and closing of water inlet;Self-priming pump is used to provide power for water circulation;Three-position three-way solenoid valve is used to control the opening and closing of water outlet and drain;Water inlet and water outlet are used to be connected with laser and cooling water machine respectively through water pipe, to realize the continuous circulation of water in anti-freezing device, laser and cooling water machine to achieve the purpose of anti-freezing;Drain is used to discharge water in anti-freezing device, laser and cooling water machine.

A core-shell nanoparticle having a cleaned nitrogen-vacancy nanodiamond (NVND) core surrounded by an upconversion nanoparticle (UCNP) shell, wherein the cleaned nitrogen-vacancy nanodiamond (NVND) core comprises a cleaned nitrogen-vacancy nanodiamond, wherein the UCNP shell comprises an upconversion nanoparticle (UCNP), wherein the UCNP comprises lithium yttrium fluoride (LiYF4) doped with a lanthanide ion combination, wherein the lanthanide ion combination comprises a M1 ion and a M2 ion, wherein M1 is ytterbium (Yb) or neodymium (Nd) and M2 is erbium (Er), thulium (Tm) or holmium (Ho), and wherein the core-shell nanoparticle emits a red-emission upon a near-infrared (NIR) excitation is disclosed. Integration of cleaned NVNDs with UNCPs for enhancing optical manipulation and enabling efficient energy transfer for applications in biological imaging, quantum sensing and laser cooling is disclosed.

In an example, the present invention provides a modular quantum computer system. The system has at least one quantum computer cell system. In an example, the system has a plurality of qubits comprising a laser coolable atom, ion, nitrogen vacancy center, silicon color center or qubit systems with an optical control capability, such that a number of the qubits range from one to 100,000, among others. In an example, the quantum computer cell system has an optical link. The optical link has a photon collection system or a pair of optical mirrors characterized by a mirror reflectivity >90% and configured to form a cavity, the cavity having a length, e.g., ranging from 1 micrometer to 1 centimeter or longer.

This invention relates to the field of optical instrument technology and discloses an experimental device for trapping cold molecular ions. The device includes a frame placed on the ground, and further comprises: a main cavity, fixedly mounted on the surface of the frame away from the ground, wherein an installation and storage area is provided inside the main cavity; an electric field trapping component, disposed on the main cavity, for forming a three-dimensional trapping potential well for charged ions; a vacuum pumping component, disposed on the frame and connected to the main cavity, for creating a vacuum environment within the installation and storage area of ​​the main cavity; a laser cooling component, disposed on the main cavity and connected to the installation and storage area within the main cavity; and an optical measurement component, disposed on the main cavity for measuring the state of ions within the installation and storage area of ​​the main cavity. The purpose of this experimental device for trapping cold molecular ions is to solve the problems of large footprint, non-compact structure, and high construction costs in existing technologies.

The utility model discloses a circulating water control cabinet and a laser cooling system, and relates to the technical field of laser heat dissipation, the circulating water control cabinet is used for heat dissipation of a laser, the circulating water control cabinet comprises a water supply device, a three-way structural member, a backwater decoupling strand and a drainage structure, the three-way structural member comprises a first connecting end and two second connecting ends, the water return structure comprises a first three-way valve, the first three-way valve comprises a discharge end and two water return connecting ends, and the two water return connecting ends are connected with the water supply device and the laser respectively; the drain pipe is arranged at the discharge end of the first three-way valve; in the scheme of the utility model, compared with the current situation that a water pipe is dismounted in a workshop, the circulating water control cabinet can completely drain residual accumulated water in the laser before the water pipe is dismounted, thereby preventing the accumulated water from flowing into the ground and avoiding potential safety hazards.

The application discloses a kind of molecular sub-Doppler cooling magneto-optical trap design method based on artificial intelligence algorithm, belong to molecular laser cooling technical field.First, construct three-dimensional molecular magneto-optical trap scheme model, then solve the optical Bloch equation of three-dimensional molecular magneto-optical trap scheme model, obtain trapping and cooling acceleration from this;Further optimize trapping and cooling acceleration calculated by optical Bloch equation, to obtain the best parameter point that can simultaneously have trapping and cooling in preset speed and preset spatial range.The present application first introduces Bayesian optimization algorithm into molecular magneto-optical trap design, solves the big problem that has plagued molecular laser cooling, i.e.sub-Doppler heating effect in type II magneto-optical trap.Three-dimensional Monte Carlo simulation shows that the scheme can reduce the temperature of molecular magneto-optical trap to 40 μK, and its phase space density increases by two orders of magnitude, which is a key step to realize molecular Bose-Einstein condensation.

The application discloses a laser cooling heat sink with a micro-channel structure, which comprises a micro-channel heat sink working end, a heat-conducting metal filling layer, a micro-channel heat dissipation reinforcing end and a heat sink base, the micro-channel heat sink working end and the micro-channel heat dissipation reinforcing end are sequentially arranged in the heat sink base, the working surface of the micro-channel heat sink working end is attached to the cooling surface of a laser crystal, the heat dissipation surface of the micro-channel heat sink working end is provided with a micro-channel structure, the micro-channel structure is connected with the micro-channel heat dissipation reinforcing end which is also provided with a micro-channel structure through the heat-conducting metal filling layer, the micro-channel structure is formed by pressing the heat dissipation ribs which are arranged in a staggered mode, liquid inlet holes and liquid outlet holes which are communicated with the micro-channel structure are formed in the heat sink base, the micro-channel structure is formed by pressing the heat dissipation ribs which are arranged in a staggered mode, the controllability of machining is higher, the machining difficulty is greatly reduced, the precision requirement of the machining equipment is greatly reduced, and the production cost is reduced.

The application discloses a kind of active coherent optical synthetic aperture super-resolution imaging space target monitoring systems, including active coherent light generation module, optical imaging module, image super-resolution reconstruction module, power module, motion control module and heat dissipation module.Active coherent light generation module is constituted by laser and optical phased array, optical imaging module is constituted by front end optics and surface array detector, image super-resolution reconstruction module is constituted by GPU and super-resolution reconstruction software.Laser provides light source for optical phased array, optical phased array irradiates light source to target, and front end optics receives target reflected light, and forms low-resolution image on surface array detector.Image super-resolution reconstruction module carries out pre-processing and super-resolution reconstruction to low-resolution image.Power module provides power supply for other modules.Motion control module is used to control system to realize aiming tracking, and heat dissipation module is used for laser cooling.The application can realize 4-8 times equivalent aperture super-resolution imaging.

The application discloses a liquid metal phase change cold plate low-deformation structure for heat dissipation of a laser and a use method thereof, and relates to the technical field of laser cooling. The structure comprises a distributed liquid metal heat dissipation unit, which comprises a plurality of built-in phase change material filling cavities arranged in an equidistant array, liquid metal filled in the phase change material filling cavities and used for absorbing heat, and the phase change material filling cavities are arranged behind optical elements and are completely sealed by a cold plate inside the cold plate; a phase change expansion buffer unit, which comprises a sliding cavity, a sealing sliding plate in sliding connection with the sliding cavity and used for dynamically sealing the liquid metal in the phase change material filling cavities, and a buffer spring arranged inside the sliding cavity and used for elastically supporting the sealing sliding plate. The distributed placement of the phase change material filling cavities improves the mechanical strength of the cold plate and the utilization rate of the cold plate; and the characteristics of the phase state transformation of the liquid metal are utilized, so that the technical effects of temperature equalization, temperature control and heat dissipation are achieved.

The invention belongs to the technical field of calcium carbide furnaces, and discloses a high-energy hole opening method for a calcium carbide furnace device, which comprises the steps of self-checking, parameter setting, positioning and adjusting, high-energy hole opening and ending. After self-checking and verifying the authority, starting multiple systems, completing function detection, and checking hidden dangers of equipment; setting parameters according to furnace eye and working condition information, and presetting laser, cooling and positioning parameters; after positioning adjustment and coarse positioning, the coordinates of the furnace eye are analyzed, and precise alignment and posture locking of the laser assembly are completed; a high-energy eye-opening laser and cooling system scans according to a composite track and is dynamically adjusted until eye opening succeeds; and stopping laser at the ending step, delaying cooling temperature reduction, resetting equipment and filing operation data. According to the high-energy hole opening method for the calcium carbide furnace device, through automation, laser and closed-loop control technologies, traditional manual operation and carbon rod operation are thoroughly replaced, safety risks and material consumption are fundamentally eradicated, remote, accurate and efficient hole opening is achieved, and the operation success rate and continuity are greatly improved.

Laser cooling vehicle for cooling a road surface, characterized in that it comprises a cooling device that utilizes Doppler cooling action, which causes the motion of atoms to enter the ground state and the low-temperature state by emitting and absorbing light with a wavelength slightly larger than the wavelength of an excited material to be cooled, where it indirectly lowers the temperature of the road surface by irradiating a gas and / or an alkali metal with laser light and carrying out a heat exchange in a cooling funnel, wherein the cooling funnel is arranged in front of a front wheel of the refrigerated vehicle such that an opening section faces the road surface.

A method for utilising a trapped ion, e.g. a barium ion, for a quantum computing system, the trapped ion having an encoded quantum information unit, e.g. an encoded qubit, configurable to be in any one of a plurality of quantum states, the method comprising: a quantum operation process 150 that adjusts the quantum state of the quantum information unit, comprising the steps of: performing a check observation 110 of the trapped ion; and raising an error flag 112 in response to detecting the quantum information unit; and performing the corrective action 114 in response to the error flag. Quantum states comprise: an error state, a ground state; a metastable state manifold. The error state may comprise a loss state of the ion escaping entrapment. The check observation can be a fluorescence readout check and may comprise decay ground check. The quantum operation may comprise laser cooling. The method addresses errors in preparation and measurement of metastable qubits.

The utility model relates to a picosecond laser device cooling system, which is characterized in that a laser device is connected with a water tank through a communicating pipeline, the water tank is connected with a pump through a communicating pipeline, the pump is connected with a radiator through a communicating pipeline, and the radiator is connected with a filter through a communicating pipeline. The filter is connected with the laser through a communicating pipeline; and water stop valves are arranged between the radiator and the filter and between the filter and the laser. According to the laser cooling system, the water stop valve structure is utilized, when the filter element is replaced, a water flowing channel can be rapidly cut off, meanwhile, it is guaranteed that liquid does not leak, and the filter element is rapidly disassembled and assembled. The whole process is simple and fast, does not need professional tools, and can be operated easily.

The invention relates to the technical field of laser cooling, in particular to a multi-layer crossed gradually-shrinking channel phase change cold plate and a control method. The multi-layer crossed tapered channel phase change cold plate comprises a first heat conduction layer, a second heat conduction layer, a first flow channel, a second flow channel and a heat conduction interlayer. The first heat conduction layer and the second heat conduction layer are arranged at intervals in the first arrangement direction, the first flow channel extends along the surface of the first heat conduction layer, and the channel sectional area of the first flow channel is gradually reduced in the first flowing direction. The second flow channel extends along the surface of the second heat conduction layer, the channel sectional area of the second flow channel is gradually reduced in the second flowing direction, and the first flowing direction is opposite to the second flowing direction. According to the invention, the problems of double-sided efficient heat dissipation, flow stability and temperature uniformity in heat management of the high-power laser can be solved.

A laser cooling system and a method of laser cooling are disclosed. The laser cooling system includes a multi-pass optical cavity; a first mirror positioned at a first end of the multi-pass optical cavity; and a second mirror positioned at a second end of the multi-pass optical cavity, wherein the first mirror or the second mirror comprises a spectrally selective coating to suppress amplified spontaneous emission (ASE) and parasitic lasing to avoid undesired heat generation in a material being cooled in the multi-pass optical cavity.

This invention relates to the field of laser cooling technology, specifically to a multi-layered cross-shrinking channel phase change cold plate and its control method. The multi-layered cross-shrinking channel phase change cold plate includes a first thermally conductive layer, a second thermally conductive layer, a first flow channel, a second flow channel, and a thermally conductive separator. The first and second thermally conductive layers are spaced apart along a first arrangement direction. The first flow channel extends along the surface of the first thermally conductive layer, and the cross-sectional area of ​​the first flow channel gradually decreases along the first flow direction. The second flow channel extends along the surface of the second thermally conductive layer, and the cross-sectional area of ​​the second flow channel gradually decreases along a second flow direction. The first and second flow directions are opposite. This invention can solve the problems of efficient double-sided heat dissipation, flow stability, and temperature uniformity in the thermal management of high-power lasers.

The application discloses a kind of based on diffuse reflection laser cooling atom's optical frequency standard frequency governing device and method, belong to laser cooling and quantum frequency standard technical field.The application is to solve the technical problem that existing diffuse reflection cold atom optical frequency standard is affected by the optical frequency shift introduced by cooling and repumping laser, resulting in limited long-term frequency stability, by periodically turning on or off cooling and repumping light source through time sequence control module, sampling and counting the error signal of probe light after passing through the cold atom group prepared by diffuse reflection by data acquisition and processing module during laser-off stage, calculating the deviation of local laser relative to cold atom transition frequency, and then realizing closed-loop calibration by frequency control unit driving frequency tuning unit.The application can effectively suppress the limitation of optical frequency shift on frequency stability, continuously improve the stability according to the law, while not interfering with the continuous output of the system, meet the needs of miniaturization, portability and long-time high-performance operation of optical frequency standard.

The invention relates to the technical field of atomic frequency standards, in particular to a two-photon optical frequency standard based on an alkali metal atomic beam, which comprises a laser system, an atomic beam system, a detection system and a control system, wherein the laser system comprises a laser, an electro-optical modulator, a frequency multiplier, a power amplifier, an adjustable power attenuator, a polarization splitting prism, a collimating lens group, a reflector and a photoelectric detector. According to the invention, hot atoms are adopted as working atoms, a two-photon transition principle is adopted, a complex laser cooling system is avoided, and the overall miniaturization of the system is ensured; by combining the advantage of no collision frequency shift of moving atoms in an atomic beam, the defect of insufficient long-term performance caused by collision frequency shift of a traditional small-sized optical frequency scale is eliminated; the Doppler effect can be further eliminated by utilizing the characteristic that the movement rate of the atoms in the vertical direction of the center line of the atomic beam is close to zero, the narrower spectral line width is obtained, and meanwhile the characteristics of excellent long and short term stability and environmental adaptability are achieved.

The utility model discloses a laser protection storage cylinder device which is structurally characterized in that a laser cooling module is a conical cylinder with an opening in the large end, and a first columnar cylinder is arranged at the opening end; the laser absorber is a conical barrel with an opening in the large end, a second columnar barrel is arranged at the opening end, and an outer flange ring is arranged at the port of the second columnar barrel to serve as a top cover; the laser absorber is sleeved in an inner cavity of the laser cooling module, the laser absorber and the laser cooling module are in clearance fit, and the top cover presses the end face of a port of the first cylindrical barrel and is fixedly connected through a top cover screw; cooling water is injected into a clamping cavity between the laser absorber and the laser cooling module, a water inlet is formed in one side of the first columnar cylinder, and a water outlet is formed in the other side of the first columnar cylinder and used for injecting and discharging the cooling water; a first light filtering device, a second light filtering device and a third light filtering device are coaxially arranged in an inner cavity of the laser absorber at intervals. The device is simple in structure, convenient to use and suitable for storage and protection of various laser devices.

The application discloses an ultranarrow-bandwidth atomic filter based on cold atoms and an implementation method thereof. The application combines cold atoms with an atomic filter, slows down atoms through laser cooling technology, reduces the influence of Doppler effect, and further realizes an ultranarrow-bandwidth atomic filter with a transmission bandwidth close to the natural line width of atomic transition. The implementation of the application can solve the problem that the influence of thermal atomic Doppler broadening causes the transmission bandwidth to be unable to be further narrowed in the existing transmission bandwidth narrowing technology of a Faraday atomic filter, and can expand the research of a traditional thermal atomic Faraday filter to the field of cold atoms in modern science, provide new possibilities for substantial and significant progress and construction of a filter based on cold atoms, and bring extremely potential development to many fields. The application overcomes the limitation of thermal atomic Doppler broadening on the further narrowing of the transmission bandwidth of a Faraday atomic filter, and brings a significant bandwidth narrowing effect.