35results about How to "Good coupling efficiency" patented technology

The invention discloses a chip array and parallel optical fiber passively-coupled optical assembly which comprises an optical fiber array assembly, a coupling alignment positioning block, a lens array, a chip carrier and a photoelectric chip array. The optical fiber array assembly comprises a fixing base and a plurality of parallel optical fibers. The lens array comprises a lens body, a second lens array face, a first lens array face and a reflection face. The photoelectric chip array is pasted to the chip carrier, the coupling alignment positioning block is positioned on the chip carrier, the lens array is positioned on one side of the optical fiber array assembly, the lens array and the optical fiber array assembly are jointly positioned on the coupling alignment positioning block, the lens array and the coupling alignment positioning block are positioned in the mode that guiding columns are fixedly inserted in guiding holes, and the lens array and the fixing base are positioned in the mode that guiding columns are fixedly inserted in guiding holes. The chip array and parallel optical fiber passively-coupled optical assembly is simple in structure and low in manufacturing cost, high-accuracy and high-quality rapid coupling can be achieved through the chip array and parallel optical fiber passively-coupled optical assembly, and the chip array and parallel optical fiber passively-coupled optical assembly is suitable for various products with the parallel optical fiber technology.

The invention relates to a coupling method of an optical receiving sub-module of an optical module, comprising the following steps: S1, fixing TIA, PD, DMUX and an adapter on a housing; Electricity, connect the light source through the adapter, and set a glass block between the adapter and DMUX; S3, select one of the roads for coupling, first fix the position of one of the first lenses in the light propagation direction of the road, and then adjust the first lens position; S4, then adjust and determine the position of the second lens between the adapter and the glass block; S5, remove the auxiliary coupled glass block, set the third lens, SOA and fourth lens on the glass block Lens; S6, and then sequentially adjust and determine the positions of several other first lenses. In the initial stage of coupling, the present invention adopts the translation of the glass block to the optical path to replace the third lens, SOA and fourth lens for coupling, and the function of the glass block is equivalent to the third lens, SOA and fourth lens to simplify the coupling process.

The present invention proposes a three-mode mode division multiplexer with low loss, low crosstalk and graded refractive index distribution, which consists of three identical transmission channels, one of which is the main transmission channel; the radius of the transmission channel is 20 μm, and the core and cladding of the transmission channel The refractive index difference is 0.0015, and the cladding refractive index is 1.442524; the refractive index from the center of the channel core to the cladding changes gradually; the mode LP01 is directly input into the main transmission channel; the mode LP11a and LP11b channels are respectively placed in the main transmission channel cross section x and y In the direction, the channel length is 33mm, and the distance from the main channel is 6μm; in the 1400nm‑1700nm band, the coupling efficiency of the multiplexer is better than ‑0.479dB; the three modes of refractive index gradient distribution, low loss and low crosstalk are realized Modulus multiplexing.

The invention provides an edge-emitting laser element, which comprises a substrate, an n-type buffer layer, a first n-type coating layer, a grating layer, a spacing layer, a lower light limiting unit, an active layer, an upper light limiting unit, a p-type coating layer, a tunneling junction layer and a second n-type coating layer, the tunneling junction layer has the efficacy of blocking the etching process to form the second n-type cladding layer into a predetermined ridge-shaped configuration pattern. After a part of the p-type coating layer is transposed into the n-type coating layer by using the tunnel junction layer, the series resistance of the EEL element is reduced, and the coupling of the light field and the active layer tends to the middle position of the active layer, so that the lower half part of the active layer can be effectively applied, and the light field is closer to the grating layer. The light coupling efficiency of the light field / grating is good, and then the critical current value is reduced.

The invention discloses a bacterial magnetic particle (BMP)-agglutinin complex and a preparation method and application thereof, belonging to the technical field of separation and purification. The preparation method comprises the following steps: performing surface modification and transformation on BMPs, and adding a cross-linking agent and agglutinin for coupling, thereby obtaining the BMP-agglutinin complex. The surfaces of the BMPs are modified, the influence of self-proteins of the BMPs on subsequent application is eliminated, more primary amino is provided for agglutinin coupling due to the addition of PE, the coupling efficiency is improved, and the dispersity of the BMPs is improved; the cross-linking agent (BS3) serves as a connecting arm, so that covalent coupling is realized between the BMPs and the agglutinin, and an agglutinin recognition sugar chain area is not damaged; and moreover, the concentration of a buffer solution is regulated, the preparation time is shortened, and the coupling efficiency is improved. The complex disclosed by the invention is used for enriching and separating specific glycoproteins, and compared with traditional affinity chromatography, the method disclosed by the invention has the advantages of fewer steps, short time and the like.