91 results about "Light conversion efficiency" patented technology

The invention provides an atypical MOPA fiber laser device integration device, system and method. The device comprises an optical resonant cavity, a first device group and a second device group, wherein the first device group comprises a first amplification stage gain optical fiber, a first reverse pumping beam combiner, a first pumping source and a first cladding light stripper, and the second device group comprises a second amplification stage gain optical fiber, a second reverse pumping beam combiner, a second pumping source and a second cladding light stripper; the optical resonant cavity is used for receiving the pump light transmitted by the first amplification stage gain optical fiber and the second amplification stage gain optical fiber, transmitting the pump light which is not absorbed to the second amplification stage gain optical fiber and the first amplification stage gain optical fiber, and generating signal light under the action of the absorbed pump light; and the signal light is transmitted to the first amplification stage gain fiber and the second amplification stage gain fiber in positive and negative directions. The device number and the manufacturing cost are remarkably reduced, the light-to-light conversion efficiency and the system reliability are improved, and meanwhile high-power beam combination and miniaturization integration are facilitated.

The invention belongs to the field of solar cell materials, and provides a compound A capable of being used as a light conversion agent, a light conversion adhesive film containing the compound A and a preparation method and application of the light conversion adhesive film. The compound A is used for the light conversion adhesive film, so that the light conversion efficiency of the light conversion adhesive film can be improved, and the absorption wavelength of the light conversion adhesive film can be regulated and controlled.

The invention provides a benzotriazole derivative and a resin composition containing the benzotriazole derivative. The benzotriazole derivative is of a 1H-site substitution type, and compared with a traditional 2H-site substitution type benzotriazole derivative light conversion material compound, the 1H-site substitution benzotriazole compound can remarkably improve the light conversion efficiency of a solar cell, especially the light conversion efficiency of the solar cell with a TOPCon photovoltaic module.

The present invention belongs to the technical field of functional films, and particularly relates to a UV-protection PVB composite film, a preparation method therefor, and the use thereof. The UV-protection PVB composite film comprises an EVA / PVB composite film formed by an EVA film and a PVB film, wherein an ultraviolet light conversion layer is provided between the EVA film and the PVB film, the EVA film contains an ultraviolet light conversion agent, the PVB film contains an ultraviolet light absorber, and the ultraviolet light conversion layer is formed by coating with a transparent ultraviolet light conversion coating, and contains the ultraviolet light conversion agent, perhydropolysilazane, α-Al2O3 and a solvent. The ultrathin inorganic ultraviolet light conversion layer is designed which uses the perhydropolysilazane as a film-forming substance and the α-Al2O3 as a dispersion aid, and therefore exhibits excellent dispersibility, transparency and durability, thus reducing the use amount of light conversion agents, improving the light conversion efficiency, and solving the problem that light conversion agents added to EVA films are difficult to disperse and thus cannot achieve effective light conversion.

An ultraviolet-irradiation-resistant high-efficiency photovoltaic module belongs to the technical field of photovoltaic equipment, solves the technical problem of insufficient light conversion efficiency of photovoltaic modules, and adopts the technical scheme that two groups of photovoltaic modules are symmetrically arranged on the surfaces of the upper side and the lower side of a battery piece, and the two groups of photovoltaic modules and the battery piece are packaged into a whole; a nano-metal low-radiation film, a photovoltaic glass plate, a one-way light-transmitting film, a composite light conversion adhesive film (including a lower conversion adhesive film and an upper conversion adhesive film), an ultraviolet scattering film, an infrared shielding adhesive film and an ultraviolet cut-off film are sequentially arranged in each group of photovoltaic modules in an overlapping manner from the surface layer to the inner layer. The solar cell module not only can protect the cell from being irradiated by infrared rays and ultraviolet rays and prolong the service life of the cell, but also can prolong the propagation path of the ultraviolet rays and the infrared rays in the module, reduce light loss, prevent the light conversion efficiency from being reduced due to temperature rise and improve the power generation efficiency.

An eyewear display device implements a curved lightguide to form an intermediate image between an incoupler and an outcoupler. The curved lightguide produces an approximately 20-degree diagonal field of view (FOV) full-color display having approximately 10% red, blue, green efficiency with uniform color and luminance for a micro-display at a temple of an eyewear display device. The curved lightguide incorporates freeform mirror incouplers and / or outcouplers and color-corrected relay optics. Using an intermediate image stage in the optical pathway allows for use of a compact incoupler that does not exceed a thickness of the curved lightguide.

This invention discloses a method for enhancing and controlling the radiation of an LPP-EUV light source based on dual-pulse spatiotemporal co-constraint, belonging to the field of semiconductor manufacturing technology. This invention obtains a spatiotemporal reference by real-time monitoring of a liquid metal droplet, uses a pre-pulse laser to induce target material deformation into a fogged target cloud, and combines high-speed imaging and a hydrodynamic model to predict the time and coordinates of the target cloud's energy absorption peak. It dynamically adjusts the delay time and optical axis direction of the main pulse laser to achieve dual-pulse spatiotemporal co-constraint, and constructs a closed-loop control system through a recursive least squares algorithm with a dynamic forgetting factor. This invention effectively improves the extreme ultraviolet light conversion efficiency, controls the power fluctuation of the light source within ±0.5%, and extends the maintenance cycle of optical components by 2 times. It can be widely applied to next-generation high-power extreme ultraviolet lithography light source systems, meeting the application requirements of semiconductor miniaturization processes.

The invention discloses a photovoltaic power station irradiance component calculation method and device. According to the method, environmental parameters and multiple groups of historical operation data of a photovoltaic power station are obtained firstly, and then target historical operation data with corresponding slope clear sky irradiance and power actual value correlation meeting preset conditions are screened out according to the environmental parameters and the multiple groups of historical operation data. And finally, exhaustion of a light conversion efficiency prediction value is carried out based on the target power actual value and the target direct light conversion efficiency and the target scattered light conversion efficiency corresponding to the target timestamp, and when the residual error between the prediction power corresponding to the prediction value and the target power actual value is minimum, the target power actual value is obtained. And determining a clear sky irradiation direct component predicted value and a clear sky irradiation scattering component predicted value corresponding to the predicted light conversion efficiency as a clear sky irradiation direct component actual value and a clear sky irradiation scattering component actual value of the target timestamp. The difference between the conversion efficiency of the direct light and the conversion efficiency of the scattered light is fully considered, and the accuracy of irradiance component calculation is effectively improved.

A quantum-dot light conversion film, a preparation method and an application thereof and an anti-ultraviolet blue-free yellow light for chip manufacturing are provided. The preparation method includes: (1) mixing a quantum-dot concentrate with an acrylic monomer, then adding high polymer for secondary mixing, to obtain a polymer; (2) after mixing the polymer and nanoparticles, adding additives for dispersion to obtain a light conversion liquid resin; and (3) coating and curing the light conversion liquid resin to obtain a quantum-dot light conversion film. The light conversion film has high light conversion efficiency, adjustable emission peak position and narrow half peak width. Its surface forms a tightly arranged high refractive index microlens structure. When the light reaches the microlens array, as the light output surface is a lens structure and the refractive index is improved, more light is emitted in the positive direction, thereby effectively improving the light output rate.

This invention discloses a YAG-based composite laser ceramic and its preparation method. The composite laser ceramic has a five-layer structure from top to bottom: a microstructured concave YAG transparent ceramic, an Nd:YAG transparent ceramic, a YAG transparent ceramic I, a Ce,Nd:YAG transparent ceramic, and a YAG transparent ceramic II. The microstructured concave YAG transparent ceramic is used to reduce the temperature gradient and compensate for the thermal lensing effect; the Nd:YAG transparent ceramic is used to collect the energy emitted by the microstructured concave YAG transparent ceramic and to transfer the energy; the Ce,Nd:YAG transparent ceramic is used for laser energy transfer; and the YAG transparent ceramic I and YAG transparent ceramic II are used to reduce the ceramic thermal lensing effect. It is prepared using thermal bonding technology. The composite laser ceramic of this invention emits bright yellow light near 1064 nm when excited by a laser with a pump source of 808 nm. Furthermore, the composite laser ceramic has a light-to-light conversion efficiency of 19.85% and a laser threshold of 410 mW.

The application provides an omnidirectional following type reversing support, which comprises a supporting assembly, an adjusting assembly and a protection assembly, the supporting assembly is composed of a stand column, a transmission shaft is arranged on the top side wall of the stand column, a sleeve is movably sleeved on the surface of the transmission shaft, a linkage mechanism is arranged in the top end of the stand column, the adjusting assembly is composed of a horizontal plate and a photovoltaic panel, the photovoltaic panel is connected with the horizontal plate through a rotating frame, a rotating shaft is rotatably connected with the inside of the annular plate, the protection assembly is composed of a fixing base, a gear ring is arranged in the fixing base, and a connecting gear is fixedly connected to one end of a supporting plate. The application adopts a double-shaft adjusting mode to adjust the angle of the photovoltaic panel, realizes the omnidirectional following function to improve the light conversion efficiency as much as possible, and drives the adjacent reversing support, the sleeve is connected to realize the synchronous control of the angle of the same row of supports, realizes the synchronous control of multiple supports, the driving mechanism can drive the supporting plate to rotate and realize the support of the two sides of the photovoltaic panel, and the use strength of the reversing support is improved.

The invention relates to the technical field of micro light-emitting diodes, and discloses a CMP quenching resistant multi-color micro light-emitting diode light-emitting structure and a preparation method, the CMP quenching resistant multi-color micro light-emitting diode light-emitting structure comprises a substrate, the substrate is provided with a basic light source pixel unit array and a transparent photoresist pattern layer, and the transparent photoresist pattern layer is arranged on the substrate. The transparent photoresist pattern layer is used for filling a gap area between adjacent basic light source pixel units, and is used for providing a flat supporting surface for subsequent chemical mechanical polishing (CMP) without bearing a shading function. According to the invention, the quantum dots are coated by the inorganic-organic shell layer, so that the influence of a CMP polishing solution and mechanical grinding can be isolated, the light conversion efficiency and stability of multi-color display are ensured, the transparent photoresist focuses on filling gaps and supporting CMP, and the thickness uniformity of the quantum dot filter layer is improved by optimizing the filling structure and thickness and avoiding the collapse of a film layer in the CMP process.

The plant growth lamp comprises a radiator, an LED lamp panel, a lens board and a driving power source used for driving the LED lamp panel, the radiator comprises a lamp panel mounting part and a power source mounting part, the LED lamp panel is mounted on the lamp panel mounting part, and the driving power source is mounted on the power source mounting part. An inner cavity is formed between the lamp panel mounting part and the power supply mounting part, and sawteeth are arranged in the inner cavity. According to the plant growth lamp, the inner cavity is formed between the lamp panel mounting part and the power source mounting part, the sawteeth are arranged in the inner cavity, the heat radiation area can be increased, the heat dissipation effect can be enhanced, and the plant growth lamp is more suitable for conventional planting; meanwhile, a circulating water pipeline is further included, circulating cooling water is added in the circulating water pipeline, the heat interaction rate is greatly increased, the light conversion efficiency is improved, meanwhile, the temperature of a lamp shell is extremely low, temperature rise of the planting environment is not affected, and leaves and stems of plants cannot be burnt.

The invention provides a vertical-structure Micro-LED chip and a preparation method thereof, and belongs to the technical field of semiconductor light-emitting devices. The vertical-structure Micro-LED chip comprises a conductive substrate, a metal bonding layer, an epitaxial structure, a quantum dot structure and a passivation layer, the conductive substrate, the metal bonding layer and the epitaxial structure are sequentially stacked, and the epitaxial structure comprises a first semiconductor layer, a multi-quantum well layer and a second semiconductor layer which are sequentially stacked in the direction away from the metal bonding layer. The through hole penetrates through the first semiconductor layer, the multi-quantum well layer and the second semiconductor layer; the quantum dot structure is filled in the through hole and is in contact with the metal bonding layer; the passivation layer is arranged on the side wall of the through hole and located between the quantum dot structure and the epitaxial structure. The light transmission loss can be reduced, the light conversion efficiency is improved, and the heat dissipation performance and reliability of the chip are improved.

The present invention discloses the preparation of a carbon quantum dot grafted polymer material and its application in photovoltaic adhesive films. By grafting a polymer material onto the surface of carbon quantum dots, the present invention more effectively disperses the carbon quantum dots evenly than other methods, improves quantum yield, and exhibits excellent and stable fluorescence properties, emitting bright blue light when excited by ultraviolet light. The material is added to photovoltaic adhesive films as a light conversion agent, absorbing ultraviolet light to protect solar cells and releasing visible light for absorption by solar cells, thereby improving their efficiency. The carbon quantum dot grafted polymer material of the present invention exhibits significant advantages in terms of light conversion efficiency, light stability, and processing performance.

The present invention relates to a coating composition for forming a UV light conversion coating for a photovoltaic cell, a UV light conversion coating prepared therefrom, a method for preparing the UV light conversion coating, and a photovoltaic cell and a photovoltaic module including the coating. The composition includes, by mass: (A) 100 parts of a polyurea precursor resin which is a mixture of a specific aspartate compound and a blocked isocyanate curing agent; (B) 0.5 to 5 parts of a UV light conversion agent; (C) 1 to 5 parts of an adhesion promoter; (D) 10 to 100 parts of an inert diluent. The light conversion coating prepared from the coating composition, when used in a photovoltaic cell or a photovoltaic module, can reduce UV band light transmittance and increase visible light wavelength transmittance, improve light conversion efficiency, and have excellent adhesion and aging resistance.

The invention belongs to the technical field of laser, and particularly discloses a low-quantum-loss laser chip and laser, and the laser chip comprises a substrate, a dual-wavelength high-reflectivity mirror, a gain region, an anti-diffusion layer and a cap layer which are sequentially arranged. The dual-wavelength high-reflectivity mirror comprises a plurality of reflection groups which are arranged in sequence, each reflection group comprises a high-refractive-index layer and a low-refractive-index layer, and the high-refractive-index layers and the low-refractive-index layers are arranged alternately; the optical thickness d light of the high refractive index layer and the low refractive index layer is equal to (lambda pump + lambda laser) / 8; the gain region comprises a plurality of gain groups which are sequentially arranged, each gain group comprises a high barrier layer and a low barrier layer, and the high barrier layers and the low barrier layers are alternately arranged. The low-potential barrier layer is directly pumped, and the required pumping photon energy is close to the laser photon energy, so that the quantum loss in the laser generation process is small, the waste heat in the chip is less, the heat effect of the laser is greatly reduced, the light-light conversion efficiency is high, and the overall output power of the laser is also greatly improved.

The invention discloses a light conversion material, an eye-protection screen protection film and a preparation method of the eye-protection screen protection film, and relates to the technical field of nano luminescent materials. The inorganic metal oxide or the inorganic non-metal oxide and the quantum dots are connected through a cross-linking material, and the inorganic metal oxide or the inorganic non-metal oxide is selected from nano silicon oxide, nano aluminum oxide, nano zinc oxide, nano zirconium oxide, nano calcium oxide, nano sodium oxide, nano manganese heptoxide or nano chromium trioxide; the particle size of the inorganic metal oxide or the inorganic non-metal oxide is 2-100 nm; the cross-linking material is selected from a silane coupling agent or a bifunctional ligand. The light conversion material and the eye protection screen protection film provided by the invention can prolong the service life of the nano luminescent material and maintain the stability of the light conversion efficiency of the light conversion material after long-term use.

The present application relates to a light source device, an image projection device, and a display device for improving light conversion efficiency of a wavelength conversion element. The light source device includes a light source; an optical element having a lens array in which a plurality of lenses are arranged in an array on one or both surfaces, and a wavelength conversion element that converts the wavelength of light emitted from the light source and passing through the optical element, the distance P between the vertices of adjacent lenses of the optical element being 1 / 4 or less of the width D of the light beam of light incident on the optical element.

The embodiment of the invention relates to the photovoltaic field, and provides silver paste and a solar cell. The silver paste comprises silver powder, glass powder and an organic carrier, the glass powder comprises first glass powder and second glass powder, and the first glass powder comprises 5-35% by mole of SiO2, 10-45% by mole of Bi2O3, 20-60% by mole of B2O3 and 1-50% by mole of first metal or transition metal oxide; the second glass powder is prepared from the following components in percentage by mole: 5 to 35 percent of Al2O3, 15 to 60 percent of PbO, 15 to 60 percent of B2O3 and 1 to 50 percent of second metal or transition metal oxide. The silver paste provided by the invention can effectively inhibit metal-silicon interface recombination in a high-sheet-resistance region, and improves the light conversion efficiency of a solar cell.

The application discloses a kind of 4.3 μm mid-infrared fiber laser of dual-wavelength cascade pumping and laser high-efficiency generation method, comprising the following steps: S1, first pump laser generates first pump light;S2, second pump laser generates second pump light;S3, first pump light is coupled into the core of dysprosium-doped indium fluoride gain optical fiber by first dichroic mirror, convex lens;Second pump light is coupled into the core of dysprosium-doped indium fluoride gain optical fiber by mirror, convex lens;S4, the laser generated by oscillation in optical resonant cavity is output by second fiber bragg grating, and first pump light not absorbed by dysprosium-doped indium fluoride gain optical fiber is filtered out using second dichroic mirror, to obtain 4.3 μm laser output.The application can avoid laser self-termination effect and small quantum loss, and 4.3 μm laser with optical-to-optical conversion efficiency up to 38% can be obtained, which significantly improves the generation efficiency.

The application provides a kind of annular spot laser processing system, including laser light source, first lens, laser crystal, first dichroic mirror, second lens, second dichroic mirror, third dichroic mirror, third lens, fourth dichroic mirror, galvanometer mechanism, target workpiece, platform.The annular spot laser processing system only needs to generate composite laser by using one laser light source, realizes composite laser processing effect, and in the processing process, the main laser can use 500-550nm green laser, which is located in the central inner ring area.The auxiliary laser can use 1000-1100nm infrared light, which is located in the outer ring area, mainly used for preheating and heat transition of target workpiece working area, used for improving green light processing efficiency.The whole process has little spatter, and the heat influence of non-target processing area is small, which greatly improves the workpiece processing precision and yield, and the light conversion efficiency of laser is high, which greatly improves the energy utilization, and the production cost is also lower.

This invention discloses a porous quantum dot color conversion layer, its preparation method, and its application. The method involves mixing a framework polymer, a porous polymer, quantum dots, and a solvent to form a mixed solution. After coating the solution onto a substrate, phase separation induced by solvent evaporation causes the framework polymer to preferentially solidify, forming a continuous phase to embed and fix the quantum dots. Simultaneously, the porous polymer accumulates to form discrete microphase domains. The porous polymer is then removed, transforming the microphase domains into pores, thus obtaining the porous quantum dot color conversion layer. This method is simple, and the resulting color conversion layer possesses high light conversion efficiency, excellent environmental stability, and patternability, making it suitable for display devices.

The invention discloses a method for reducing the polarization loss of a laser, and the method comprises the following steps: arranging a first reflector and an emergent mirror in a resonant cavity, and arranging a polarization element on a light path between the first reflector and the emergent mirror, a quarter-wave plate, a pump light source module and a Q-switching module are arranged on a light path between the polarization element and the first reflecting mirror, the emergent mirror is located on the linearly polarized light emergent side of the polarization element, and a second reflecting mirror is arranged on a reflecting light path of the polarization element. The invention solves the problems of serious polarization loss and low light-to-light conversion efficiency of the resonant cavity of the large-energy laser in the prior art.

Disclosed are a complex phase fluorescent ceramic and a preparation method therefor. The general chemical formula of the complex phase fluorescent ceramic is Ca1-xMnxO-(Re1-yCey)3Al5O12, 0.04≤x≤0.08, 0<y<0.01, Re3+ being one of Lu3+, Y3+ or Gd3+, and the mass ratio of Ca1-xMnxO to (Re1-yCey)3Al5O12 being 10-25:75-90. First, Ca1-xMnxO powder is prepared by a high-temperature solid-phase method; the obtained powder is mixed with (Re1-yCey)3Al5O12 raw material powder, and Ca1-xMnxO-(Re1-yCey)3Al5O12 multi-phase fluorescent ceramic is produced using a solid-state reaction sintering method. Since CaO:Mn is encapsulated within the (Re1-yCey)3Al5O12 ceramic, the problem of CaO easily absorbing moisture can be effectively avoided. Under excitation from a 440-460 nm blue laser, the complex phase fluorescent ceramic of the present invention simultaneously emits yellow-green Ce3+ fluorescence, with a dominant wavelength of 510-565 nm, and orange Mn2+ fluorescence, with a dominant wavelength of 600-630 nm. The ceramic exhibits thermal conductivity as high as 14-20 Wm-1K-1 at room temperature. When the blue laser pumping density is 50-80 W / mm2, the complex phase fluorescent ceramic exhibits a relative light conversion efficiency of 99%-99.8% of the initial efficiency and a color rendering index of 80-95, achieving enhanced luminescence stability and color quality under high pump power density excitation.

The invention belongs to the technical field of mechanoluminescence materials and devices, and particularly relates to a composite material with a double-layer arch structure for enhancing mechanoluminescence response and a preparation method of the composite material. The composite material is of a double-layer arch-shaped structure composed of a supporting layer and a light-emitting layer. The support layer is prepared from the following raw materials: PDMS, a curing agent and SiO2; the luminescent layer is prepared from PDMS, a curing agent and a ZnS: Cu mechanoluminescent material. According to the material, normal pressure is efficiently converted into multidirectional tangential force coupling action through a unique geometric mechanics conversion mechanism, and the force-light conversion efficiency is further optimized in combination with the porous structure design, so that the sensing ability of the ZnS: Cu luminescent material to normal force is remarkably improved. The invention also provides a preparation method and application of the mechanoluminescent material.

The invention discloses a perovskite type metal oxide-containing light conversion film and a preparation method thereof, and relates to the technical field of light conversion, the light conversion film comprises the following raw materials by weight: 100 parts of an ethylene-vinyl acetate copolymer, 1-5 parts of a light conversion agent La < 0.7 > Tb < 0.3 > Al < 0.7 > Cr < 0.3 > O < 3 >, 1-5 parts of a silane coupling agent and 1-3 parts of a cross-linking agent. The invention further discloses a light conversion film containing the perovskite type metal oxide and a preparation method of the light conversion film. The light conversion film can realize conversion from near ultraviolet light to red and blue light and conversion from green light to red light, not only can enhance the light conversion rate of a monocrystalline silicon solar cell and prolong the service life of a heterojunction cell, but also can be used for an agricultural film to promote the growth of crops.

The invention relates to a rare earth complex light stabilizer and a preparation method and application thereof, the rare earth complex light stabilizer comprises [Ce (triRNTB) 2] X3 and / or RE (BP) 3, and the rare earth complex light stabilizer comprises 40-100 parts by weight of [Ce (triRNTB) 2] X3 and 0-60 parts by weight of RE (BP) 3. According to the invention, a rare earth complex is introduced into an organic fluorescent dye light conversion system as a novel functional additive. By constructing a light conversion-stabilization bifunctional composite system, the bottleneck of light stability of small molecule dye can be solved, and light conversion efficiency compensation can be realized by utilizing the photoluminescence enhancement effect of the complex. The strategy provides an innovative material design thought for developing a blue light conversion film with long service life and high stability, and has important practical significance for promoting technical upgrading of a light conversion material.

The application provides a display substrate and a display device. The display substrate comprises: a substrate; a plurality of sub-pixels arranged on the substrate and configured to emit light of a first color; a quantum dot conversion layer arranged on the light emission direction side of the sub-pixels and comprising a first light conversion area for converting light of the first color into light of a second color and a second light conversion area for converting light of the first color into light of a third color; wherein the first light conversion area has: first quantum dots configured to convert light of the first color into light having a first wavelength; and second quantum dots configured to convert light of the first color and light having the first wavelength into light having a second wavelength; the second wavelength corresponds to the second color; the second wavelength is greater than the first wavelength; and the first wavelength is greater than the wavelength of light of the first color. The path of energy transfer of the conversion of light of the first color into light of the second color can be lengthened, and the light conversion efficiency is improved.

The present disclosure can generate laser light having an ultrashort pulse and high peak power, be miniaturized, and improve light-pulse light conversion efficiency. A laser element includes: a laminated semiconductor layer that includes a first reflection layer for a first wavelength and an active layer that performs surface light emission at the first wavelength; a laser medium that is disposed on a rear side of an optical axis of the laminated semiconductor layer, and includes a second reflection layer for a second wavelength on a first surface facing the laminated semiconductor layer and a third reflection layer for the first wavelength on a second surface on an opposite side to the first surface; a fourth reflection layer for the second wavelength that is disposed further toward the rear side of the optical axis than the second surface; a first resonator that resonates light of the first wavelength between the first reflection layer and the third reflection layer; a second resonator that resonates light of the second wavelength between the second reflection layer and the fourth reflection layer; and a semiconductor saturable absorber that is disposed between the third reflection layer and the fourth reflection layer and generates the light of the second wavelength by mode-locking, and the optical axis of the laminated semiconductor layer and an optical axis of the laser medium are uniaxially arranged.