115results about How to "Adjustable wavelength" patented technology

A doping method for forming quantum dots is disclosed, which includes following steps: providing a first precursor solution for a group II element and a second precursor solution for a group VI element; heating and mixing the first precursor solution and the second precursor solution for forming a plurality of II-VI compound cores of the quantum dots dispersing in a melting mixed solution; and injecting a third precursor solution for a group VI element and a forth precursor solution with at least one dopant to the mixed solution in turn at a fixed time interval in order to form quantum dots with multi-shell dopant; wherein the dopant described here is selected from a group consisting of transitional metal and halogen elements. This method of the invention can dope the dopants in the inner quantum dot and enhance the emission intensity efficiently.

A doping method for forming quantum dots is disclosed, which includes following steps: providing a first precursor solution for a group II element and a second precursor solution for a group VI element; heating and mixing the first precursor solution and the second precursor solution for forming a plurality of II–VI compound cores of the quantum dots dispersing in a melting mixed solution; and injecting a third precursor solution for a group VI element and a forth precursor solution with at least one dopant to the mixed solution in turn at a fixed time interval in order to form quantum dots with multi-shell dopant; wherein the dopant described here is selected from a group consisting of transitional metal and halogen elements. This method of the invention can dope the dopants in the inner quantum dot and enhance the emission intensity efficiently.

The invention is a tunable wavelength selecting / locking optical dense wave division multiplex wave combining / separating device, including an input port and eight wave separation output ports, two wavelength tuning selection combining components, and the wavelength locking control structure includes optical-fiber coupler, optical FP etalon, fast wavelength tuning filter, two fast photoelectric conversion probes, and differential amplifier tracking signal processor. The wavelength locking control structure collects and processes two optical signals of a primary optical path and controls the wavelength tuning selection combining components in the primary optical path by circuit feedback. The wavelength tuning selection combining components are packaged with many optical resonance cavities in parallel on an optical shared surface, adopt the electrooptical effect of electrooptical polymer film and the multi-reflection coherence theory of optical resonance cavities to form tuned filtering characteristic, making the output of each wave separation port of the multiplexer meet the design requirements on wavelength selection and wideband tuning, and it makes locking control on the central wavelength of each channel, stable and reliable.

The invention relates to an optical engine for laser projection display of a three-piece liquid crystal on silicon (LCOS). The optical engine comprises a red laser, a green laser, a blue laser, three dodging and reshaping systems, an optical core, a three-piece LCOS, a reflecting mirror and a projection objective, wherein the luminescence centers of the three lasers are positioned on the main optical axes of corresponding dodging and reshaping systems; the three optical axes of corresponding dodging and reshaping systems are parallel with one another; three light beams emitted by the three lasers are adjusted into uniform rectangular parallel light beams by the dodging and reshaping systems respectively; two beams of light directly enter corresponding polarization beam splitters, and the other beam of light is reflected by the reflecting mirror and enters a corresponding polarization beam splitter; and polarized light in three colors is finally combined into white light and enters the projection objective by the optical core. The lasers are taken as light sources, generated laser light is small-bandwidth linear polarized light, and a color filter is not used, so that a large number of polaroids are eliminated, cost is lowered, and the utilization ratio of optical energy is increased simultaneously; and the color gamut range, color brightness degree and color fidelity degree of the optical engine are better than those of the optical engine of the conventional optical system.

The invention discloses a preparation method of a water-soluble green fluorescent silicon quantum dot. According to the method, glucose or sodium ascorbate is adopted as a reducing agent (protecting agent); 3-aminopropyltrimethoxysilane or 3-aminopropyltriethoxysilane is adopted as a silicon source; the silicon quantum dot is directly synthesized by adopting a water bath method (the temperature of a water bath is 50 to 80 DEG C); the synthesized silicon quantum dot is purified, so as to obtain the high-purity silicon quantum dot. The method is simple and easily feasible; a current process flow for synthesizing the silicon quantum dot is simplified drastically; the cost for synthesizing the silicon quantum dot is decreased drastically; the heating by the water bath lasts for tens of minutes, so that the water-soluble green fluorescent silicon quantum dot which is nontoxic, is good in water solubility, adjustable in wave length and high in quantum yield can be obtained.

The invention relates to a nitrogen oxides luminescent material and a preparation method and an application thereof, belongs to the semiconductor field. The chemical formula of the nitrogen oxides luminescent material is AxByOzN(2 / 3x+4 / 3y-2 / 3z):R, wherein A is one or more of Be, Mg, Ca, Sr, Ba, Zn, Li and Na, and B is one or more of Si, Ge, Zr, Ti, B, Al, Ga and In and contains at least Si. The luminescent material has stable chemical property and excellent luminescent performance, can be used as the blue / green-to-red nitrogen oxides luminescent material of white-light LED which can be excited by ultraviolet LED or blue light LED; the excitation wavelength is 300-500nm, the luminescent wavelength is 470-700nm, and the luminescent material can be used to prepare white light LED lighting sources or display sources by combining the blue light LED or ultraviolet or near-ultraviolet LED.

Disclosed are a silicon-based mixed and integrated tunable laser and a photon chip. The laser comprises a semiconductor optical amplifier, a silicon-based spot-size converter, a thermal regulation silicon-based annular resonator, a silicon-based phase shifter and a dual-port silicon-based multi-mode interference reflecting mirror which are arranged in sequence; the dual-port silicon-based multi-mode interference reflecting mirror comprises input waveguide, output waveguide, multi-mode waveguide, and conical waveguide for enabling the input waveguide and the output waveguide to be connected with one end of the multi-mode waveguide separately; the input waveguide is connected to the output end of the thermal regulation silicon-based annular resonator; two etching surfaces with an angle of 45degrees with the waveguide axis are arranged at the other end of the multi-mode waveguide; the two etching surfaces are perpendicularly crossed and positioned on the axis of multi-mode interference self-imaging waveguide; and the laser and other silicon-based functional devices form the photon chip. The tunable laser and the photon chip disclosed in the invention have the advantages of small dimension, low cost, easy integration, and wide application prospect in the fields of integrated photoelectronics and optical communication.

The invention discloses a scenic area road traffic pollution early-warning device based on a remote sensing technique. Atmospheric laser measurement systems are arranged at measuring points of three to five commanding heights, and all of the atmospheric laser measurement systems are connected to a server; a monitoring result device which is used for detecting the concentration of pollutants of a scenic area road traffic environment air roadside fixed routine monitoring station is connected to the server; a monitoring device of a scenic area combined environment air fixed routine monitoring station is connected to the server; in consideration of various advantages and disadvantages of a current area environment monitoring platform, according to the geographic feature of 'on three sides are cloud-capped hills, on one the busy town' of a West Lake scenic area, NO2 and other chemical substances which are mainly generated by road traffic in the scenic area are monitored in real time by constructing an atmospheric remote sensing and remote measuring platform at the commanding heights around the West Lake.

The invention discloses a silicon-based multifunctional reconfigurable optical filter which comprises a first straight waveguide, a second straight waveguide and a plurality of micro-rings. The micro-rings are connected in parallel through the first straight waveguide and the second straight waveguide. Light field coupling happens between the micro-rings and the two straight waveguides, and no light field coupling happens between the micro-rings. The micro-rings are distributed at equal intervals. The optical filter composed of the micro-rings and the two straight waveguides comprises a plurality of resonant peaks. By controlling the distance of the micro-rings, the phases transmitted and introduced in the straight waveguides between every two adjacent micro-rings by the field with adjacent resonant peak wavelengths are odd times and even times of pi respectively, resonance of different strength is generated for the light field with the adjacent resonant peak wavelengths, and thereforethe optical filter has different filtering characteristics. The filtering functions with different filtering characteristics are achieved through the same filter structure, and it can be ensured thatthe central wavelength and bandwidth of the filter are adjustable.

The invention discloses an external cavity type single-wavelength tunable laser using an FP (Fabry-Perot) laser as a grain light source. The external cavity type single-wavelength tunable laser comprises an FP laser chip; light waveguide is arranged in the FP laser chip; a partial transmission and reflection lens is arranged on the end face of a port for deriving an excitation light source in an optical waveguide port, and a high-reflection membrane is arranged on the end face of the other port; and an optical lens, an optical etalon for carrying out transmission filtering on a transmission light beam of the excitation light source, and a partial reflector for carrying out partial reflection and partial transmission on light beams transmitting the optical etalon are arranged at one side of the port for deriving the excitation light source in the optical waveguide port in sequence. One wavelength peak of the excitation light source is overlapped to one wavelength position of a transmission peak of the optical etalon by changing the distribution of a comb-shaped wavelength wave of the excitation light source, or changing the distribution of the comb-shaped wavelength peak of the excitation light source and the transmission peak of the optical etalon, so that maximum feedback is obtained by a wavelength of a photon at an overlapped position. With the adoption of the external cavity type single-wavelength tunable laser provided by the invention, single-wavelength laser can be output, and a wavelength of output laser can be continuously or selectively changed.

The invention belongs to the technical field of temperature sensors and provides a temperature sensor based on microstructure fibers, the manufacturing method of the temperature sensor, and a temperature measuring device. The temperature sensor comprises at least two microstructure fibers, wherein every two adjacent microstructure fibers are connected in series through a multimode fiber. For a fiber core and a cladding of each microstructure fiber, air holes distributed in the axial direction are formed in the cladding at least. Quantum dot materials are arranged in the air holes. The wavelength of fluorescent light emitted by the quantum dot materials in a microstructure fiber is different from the wavelength of fluorescent light emitted by the quantum dot materials in another microstructure fiber. Compared with ordinary fluorescent materials, the quantum dots have the advantages of being large in excitation wavelength, adjustable in fluorescent wavelength, stable in fluorescent intensity and the like. By adding quantum dots in different types and sizes into the microstructure fibers, the microstructure fibers can be distinguished in a wavelength domain according to the fluorescent wavelengths, and quasi-distributed sensing is realized.

The invention discloses a device for treating waste water with a microwave electrodeless excimer lamp and a gas distributing system for the electrodeless excimer lamp in the device. A waster water treatment pond of the device is arranged below the shell of a microwave generator; 1 / 5 to 1 / 3 of the electrodeless excimer lamp is fixed in a resonant cavity, and the part of the electrodeless excimer lamp, which is not arranged in the resonant cavity, is sheathed with a quartz casing tube with a closed lower end; the microwave generator comprises a fan and a cooling copper tube which are used for cooling the resonant cavity, the fan is fixed on the inner side wall of the shell, and the cooling copper tube is welded around the external surface of the shell; the gas distributing system for the electrodeless excimer lamp is also provided with a cold well in front of a vacuum pump; and the pipeline, which is connected with a third port of a second three-way valve, is connected with a gas bottle, a gas storage bottle, a pressure indicating meter, a buffer bottle and a gas filling pipeline in parallel. The vacuum gas distributing system has a high vacuum degree, and can fill different gases according to the specific ultraviolet wavelength required by waste water treatment, so that the electrodeless excimer lamp can emit ultraviolet light with high intensity and high light effect.

The invention discloses an all optical wavelength converter based on laser four-wave frequency mixing effect, composed of a laser, a looper and a filter, where the laser is an optical-fiber grating external-cavity semiconductor laser, a signal at angular frequency of omega s is injected through the looper to the laser and generates the four-wave frequency-mixing effect with the pumping light at angular frequency of omega p in an active medium so as to generate a conjugate light at angular frequency of 2 omega p-omega s, forming a conversion output signal, which is coupledly inputted to the filter through the looper, thus realizing the wavelength conversion. As compared with the SOA-based wavelength converter, it needs no additional pumping light source because the laser directly provides wavelength conversion, simple-structural and low-cost; it adopts optical-fiber grating, therefore it has the advantages of high stability of wavelength conversion, and regulable wave conversion.

The invention relates to preparation of quantum dots, and discloses a preparation method of thick-shell core-shell quantum dots. A key step is that after quantum dot cores are prepared, an organic phosphine reagent is used for removing metal ions adsorbed on surfaces of the quantum dot cores, wherein the organic phosphine reagent is at least one of tributyl phosphine, triphenyl phosphine, tri-n-octyl phosphine, diphenyl phosphine, and dioctyl phosphine. The invention also discloses an LED containing the quantum dots. The invention provides a simple, convenient and economical method for preparing efficient green light-emitting core-shell quantum dots, and the method, based on an organic phosphine reagent assisted quantum dot extraction purification process, can be used for preparing thick-shell core-shell quantum dots which are controllable in wavelength, narrow in half band width, and high in quantum yield.

The invention relates to the technical field of optical waveguide of fluids and particularly relates to a micro-fluidic spectral waveguide structure for regulating a light sensing gene. The structure comprises a spectral waveguide chip, an electrode detecting and recording sheet and a cell culture runner, wherein the cell culture runner is arranged at the light outlet of the spectral waveguide chip which is in a dividing light-splitting structure for dividing stimulating light into multiple lights; the stimulating light is used for stimulating cells in the cell culture runner; the electrode detecting and recording sheet is used for collecting response signals of cells. By adopting the dividing light-splitting structure provided by the invention, an array light source can be generated to achieve independent and high-precision fixed-point stimulation and culture of light sensitive nerve cells, thus a multi-point small light source stimulates every nerve cell in a nerve network. The quantity of dot matrixes of laser outlet points can be optimized according to demand. The structure has the advantages of being centralized in intensity of light source, small in transmitting area, adjustable in wavelength and skillful and simple in structural design.

The invention relates to a polarization independent tunable optical filter based on a quasi-phase matching crystal. The optical filter comprises a light source, a spectrometer, an optical circulator, a polarization controller, a polarization beam splitter / combiner, the quasi-phase matching crystal, a first polarizer, a second polarizer, a first fiber collimator and a second fiber collimator, wherein an input port of the optical circulator is connected with the light source; an output port of the optical circulator is connected with the spectrometer; the other output port of the optical circulator is connected with the polarization controller; the polarization controller is connected with the polarization beam splitter / combiner; an output arm of the polarization beam splitter / combiner is sequentially connected with the first fiber collimator, the first polarizer, the quasi-phase matching crystal, the second polarizer, the second fiber collimator and the other output arm of the polarization beam splitter / combiner to form an optical loop; and the polarization directions of the first polarizer and the second polarizer are mutually vertical. The optical filter has a simple structure, reduces related loss of polarization, can obviously increase utilization rate of filtering energy and improves output power.

The present invention discloses a visible infrared broad band absorber and a preparation method thereof. The device is formed by a multilayer structure consisting of a metal bottom layer, a polymer granular layer, a metal interface layer, a dielectric layer and a metal outer layer in order from a substrate to up. The operating wavelength of the absorber can cover the visible light wave band ( 0.4-0.8[Mu]m) and shortwave infrared band ( 1.1-3[Mu]m), medium wave infrared band ( 3-6[Mu]m) and long wave infrared band ( 6-14[Mu]m). The peak value absorptivity A can reach 99%, and the full width at half-maximum can reach 2[Mu]m. The visible infrared broad band absorber is high in absorption efficiency, wide in operation band and adjustable in wavelength; the visible infrared broad band absorber is not sensitive to incident light polarization and angle; and the visible infrared broad band absorber is simple in technology and low in cost, can perform large-scale preparation and can be grown on a flexible substrate, etc.

A method for tuning laser output wavelength based on self-mixing effect belongs to the field of opto-electrical engineering. The tuning method comprises the following steps of: feeding laser output light back to a laser by an external reflecting mirror; realizing the tuning of the laser output wavelength by changing feedback light intensity by making use of semiconductor laser self-mixing effect. Ways for controlling backward feedback light intensity are as follows: inserting a linear polarizer, an attenuation film and a variable diaphragm between the laser and the reflecting mirror, or adjusting the pitching of the reflecting mirror. The invention provides a new method for tuning laser output wavelength, which can effectively avoid larger power change due to wavelength tuning, thus realizing the purpose of keeping the output light power to be relatively stable during the wavelength tuning. In addition, the method can be applied to conducting external modification to the laser with fixed wavelength, thus causing the wavelength to be adjustable, being simple and easy, and greatly reducing the cost for system modification.

Green phosphor activated by cerium ions is characterized in that the general chemical formula is as follows: (Ca1-x-p-q, M1x) (Sc1-y, M2y) <2> M3bO3+a+2b: Cep, M4q, wherein the M1 refers to Ba, Sr, Mg or Zn; M2 refers to Ga, Al or B; M3 presents Si or Ge, and M4 presents Y, La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb or Lu; and x is smaller than 1 and larger than 0, y is smaller than or equal to 0.1 and larger than or equal to 0, a is smaller than or equal to 3 and larger than or equal to1, b is smaller than or equal to 3 and larger than or equal to 0, p is smaller than or equal to 0.2 and larger than or equal to 0.001, and q is smaller than or equal to 0.3 and larger than or equal to 0. The green phosphor provided by the invention can emit 480-620 nm light under the excitation of 400-480 nm light, and is the green phosphor suitable for an LED (Light Emitting Diode) chip with blue light.

The invention provides an organic iridium metal complex, a preparation method thereof and organic electroluminescent devices. The organic iridium metal complex is shown as chemical formula 1, the wavelength of a compound can be adjusted by selecting specific heterocyclic ligand combination, and after the obtained organic iridium metal complex is used for the organic electroluminescent devices, therequired driving voltage of the organic electroluminescent devices is low, and the light-emitting efficiency is improved; the preparation method of the organic iridium metal complex provided by the invention has the advantages of simple synthesis steps, easy product purification, high purity and high yield.

The invention discloses a microwave photonic filter structure capable of realizing complex coefficient. The structure consists of a laser source (101), a light path sequential connection polarization modulator (102), an optical tunable filter (103), an optical coupler (104), an optical adjustable delay line (105), an optical attenuator (106), a polarization beam splitter (107) and a photoelectric detector (108). The structure has the advantages that the microwave photonic filter has the complex coefficient characteristic; and compared with the negative coefficient filter, the free frequency spectrum range is not changed while the central wavelength of the filter can be adjusted. Compared with the scheme of the conventional complex coefficient microwave photonic filter, the structure can be realized only by one light source, so that the cost is reduced. The tunability of the filter can be realized only by changing the polarization detection direction of an optical signal, so that the adjustment is convenient.

The invention relates to a method for preparing a non-periodic optical superlattic titanium diffused waveguide, which belongs to the technical field of laser generators. A titanium diffusion technology is adopted on the -Z surface of a lithium niobate wafer. Pre-splash titanium bars on the -Z surface are diffused inwards to the substrate of the lithium niobate wafer to form a waveguide layer. Then, room-temperature electric field polarization is carried out to change the polarizing direction of the electric domain structure of the lithium niobate wafer, thereby obtaining the titanium diffused waveguide structure. The invention has the advantages that the multi-wavelength laser can stably work at room temperature and is not sensitive to the outside environment; the device is simple and has novel structure and low cost; the method effectively avoids the uniform gain spread effect of doped optical fibers in the traditional multi-wavelength laser; by changing the inputted wavelength of the pumping light, the wavelength or the wavelength interval of the output laser can be flexibly adjusted.

A preparation method of surface crease boron carbon nitride fiber includes the following steps of firstly, putting polyacrylonitrile precursors in a reaction furnace, vacuumizing the reaction furnace and substituting nitrogen, introducing boron trichloride gas or mixed gas of boron trichloride gas and nitrogen, and raising the temperature; secondly, keeping the temperature, and alternately introducing the mixed gas of boron trichloride gas and nitrogen, and mixed gas of ammonia gas and nitrogen; thirdly, raising the temperature; fourthly, cooling the system to the room temperature to obtain the fiber. The fiber has a creased surface, has good mechanical performance, and forms a high contact angle together with water; due to the link structure of the fiber surface, the meshing between the fiber and a base body is enhanced, and the mechanical performance of a fiber enhanced composite can be greatly improved. In addition, the fiber with the surface of the structure has good application prospects on the aspects of controlling surface wettability, manufacturing microfluidic devices and the like.

The invention discloses a device for treating waste water with a microwave electrodeless excimer lamp and a gas distributing system for the electrodeless excimer lamp in the device. A waster water treatment pond of the device is arranged below the shell of a microwave generator; 1 / 5 to 1 / 3 of the electrodeless excimer lamp is fixed in a resonant cavity, and the part of the electrodeless excimer lamp, which is not arranged in the resonant cavity, is sheathed with a quartz casing tube with a closed lower end; the microwave generator comprises a fan and a cooling copper tube which are used for cooling the resonant cavity, the fan is fixed on the inner side wall of the shell, and the cooling copper tube is welded around the external surface of the shell; the gas distributing system for the electrodeless excimer lamp is also provided with a cold well in front of a vacuum pump; and the pipeline, which is connected with a third port of a second three-way valve, is connected with a gas bottle, a gas storage bottle, a pressure indicating meter, a buffer bottle and a gas filling pipeline in parallel. The vacuum gas distributing system has a high vacuum degree, and can fill different gases according to the specific ultraviolet wavelength required by waste water treatment, so that the electrodeless excimer lamp can emit ultraviolet light with high intensity and high light effect.

A LIDAR sensor for detecting an object within a sensing region and a method for activating a LIDAR sensor. The LIDAR sensor includes at least one transmitting unit. The transmitting unit includes at least one source for emitting electromagnetic radiation, and at least one deflection unit for deflecting the electromagnetic radiation emitted by the source into the sensing region along a deflection direction. The transmitting unit further includes at least one transmit filter element for filtering the electromagnetic radiation deflected by the deflection unit, which the electromagnetic radiation strikes along a transmit filter input direction. The transmission behavior of the transmit filter element is a function of the transmit filter input direction.

The invention belongs to the technical field of secret communication, and discloses a Gbps physical key secure distribution system, which comprises a first laser, a second laser, a first semiconductorlaser and a second semiconductor laser; wherein a signal output by the first laser passes through the first polarization controller and the first optical fiber coupler, enters from one end of the single-mode optical fiber, passes through the single-mode optical fiber and the second optical fiber coupler, and is injected into the second semiconductor laser to generate chaotic laser; a signal output by the second laser passes through the second polarization controller and the second optical fiber coupler, enters from the other end of the single-mode optical fiber, passes through the single-modeoptical fiber and the first optical fiber coupler, and is injected into the first semiconductor laser to generate chaotic laser; and then chaotic laser signals output by the first semiconductor laserand the second semiconductor laser are respectively detected by the photoelectric detector and converted into random number sequences by the analog-to-digital converter to be stored in the memory. According to the invention, the security of secret key distribution is ensured, and high-speed physical secret key security distribution is realized.

The invention provides an optical network unit transceiver for a TWDM-PON (Time and Wavelength Division Multiplexed Passive Optical Network) system. The transceiver comprises an optical coupler, a comb filter coupled with the optical coupler, a first optical circulator coupled with the comb filter, an downlink receiver coupled with the first optical circulator, a second optical circulator coupled with the optical coupler and the first optical circulator respectively, and an optical source configured to modulate uplink data into uplink optical signals and output the uplink optical signals.

The invention discloses a white light LED packaging structure and packaging method. The packaging structure comprises a blue light LED chip, a packaging substrate, a light-transmitting carrier, a multilayer-color quantum dot coating layer and a polysiloxane packaging layer, wherein the packaging substrate is used for fixing the blue light LED chip; the packaging substrate comprises a base and a surrounding baffle arranged on the periphery of the base; the blue light LED chip is fixed on the base; the light-transmitting carrier is arranged in the packaging substrate and above the blue light LEDchip; the multilayer-color quantum dot coating layer is arranged on the surface of the light-transmitting carrier; and the polysiloxane packaging layer is arranged on the surface of a protection layer. By virtue of the packaging structure, multi-color quantum dots are mixed to form a warm white light LED which is low in color temperature, high in visual effect and stable.

The invention relates to an adjustable-wavelength emitter (100) for a TWDM-PON. The adjustable-wavelength emitter comprises a multi-mode emitter (110) outputting an optical signal containing multiple longitudinal modes, an optical annular device (120) having a first port used for receiving the optical signal of the multi-mode emitter, a second port used for outputting the optical signal and a third port, and a first micro ring resonator (130) having a first input end used for receiving the optical signal from the second port, a first output end used for outputting a first component of a resonance portion of the optical signal and a second output end used for outputting a second component of the resonance portion of the optical signal, wherein the second output end is connected with the third port of the optical annular device (120).

The invention relates to a wide-range wavelength-tunable etalon which comprises a first base plate and a second base plate. The first base plate is parallel with the second base plate. A side transition layer for supporting is arranged between the first base plate and the second base plate and is made of material with thermal expansion coefficient alpha1. A central transition layer is further disposed between the first base plate and the second base plate and is made of material with thermal expansion coefficient alpha2. The central transition layer is thinner than the side transition layer. One surface of the central transition layer is tightly attached to the inner side of the first base plate. A width-variable clearance is reserved between the opposite surface of the central transition layer and the inner side of the second base plate and serves as a resonant cavity for beam reflection or transmission. The wide-range wavelength-tunable etalon allows central wavelength to be tuned in wide range. According to the concept, the etalon is made of different materials so as to adaptive to different service environments and is simple in structure and convenient to manufacture.