Other

Bwt Beijing Ltd.

Empire Technology Development LLC

Xiaohua Chen

Baohua Wang

Weirong Guo

Tao Wang

Lei Xu

Dan Xu

Zhijie Guo

Zidong Wang

A semiconductor-fiber-laser assembly is provided that includes a pumping module, an active optical fiber and an assembling board. The active optical fiber is provided on an upper surface of the assembling board, the pumping module is provided on a surface of the assembling board that is the same as or opposite to the upper surface; and input-side and output-side optical-fiber gratings are provided at two ends of the active optical fiber, to form a laser resonator between the input-side and output-side optical-fiber gratings. The pumping module includes a plurality of semiconductor-laser single emitters, a collimating-lens group and a mirror group that are sequentially arranged, and light beams from the semiconductor-laser single emitters pass through the mirror group to realize beam combination.

Semiconductor-fiber-laser assembly and fiber laser

A method and apparatus cast a material with nano-micro duplex grain structure. The apparatus includes module system, heating system casting mold and gating system, multiaxial compound motion system accompanied by the following technological characteristics; alloy smelting; after heat preservation, alloy melt is poured into the casting mold which is put into the centrifugal barrel of the six-axis motion system; then the casting mold carries out composite motion and the alloy melt starts solidification; as a result, casting Al&#x2014;Si alloy block with multi-scale nano-structure includes nano-micro duplex grain group is prepared.

Method and apparatus for casting a material comprising of nano-micro duplex grain structure

The present invention discloses a laser beam combination apparatus, comprising: a water cooling plate, a beam combiner and two laser arrays; each of the laser arrays comprises N lasers, wherein N is a positive integer more than 1; the two laser arrays are fixed on an upper surface and a lower surface of the water cooling plate, respectively; and the beam combiner performs a spatial beam combination, a polarization beam combination or a wavelength beam combination of laser beams output from the two laser arrays. Thus it can be seen that in the technical solution provided by the present invention, arrays of lasers are arranged on the upper and lower surfaces of the water cooling plate, and under the condition that a beam combination is performed on the same number of laser light beams, the water cooling plate is used in a high efficiency to decrease the volume and weight of the laser light beam combination apparatus, save the material of the water cooling plate of the laser light beam combination apparatus, and reduce the cost of the laser light beam combination apparatus, thus meeting the production and processing requirement of the laser light beam combination apparatus, and promoting the continuous development and progress of the laser light beam combination technique.

Laser beam combination apparatus

In accordance with embodiments of the present disclosure, a process for correlating a plurality of multimedia objects with a plurality of recording devices is described. The process may be implemented to generate a group label for a recording group, wherein the group label corresponds to a specific time and a specific location for the recording group. The process may include receiving, from a recording device, a join request seeking to join the recording group. The process may also include, upon approval of the join request, transmitting the group label to the recording device, wherein the group label is used by the recording device during generating of a multimedia object.

Multimedia object correlation using group label

A safety belt without tightly binding body includes a safety belt, a belt retractor, a flashboard, a buckle and a limiter. The limiter includes a housing having a belt inlet and outlet located at side faces thereof. An upper roller and a lower roller are provided within the housing. The lower roller is movably engaged with two lower roller supports disposed in the lower housing. A clamping sleeve is fixedly secured around the lower roller. Electromagnets are mounted to the lower roller supports, respectively. A ratchet wheel and a ratchet pawl are mounted to the lower roller. A clamping sleeve is fixedly secured around the upper roller. The upper roller is movably engaged with two upper roller supports. Springs are provided on the two upper roller supports, respectively. A ratchet wheel and a ratchet pawl are mounted to the upper roller. Electromagnets may be mounted to the bottom of the upper roller supports, respectively. A motor may be mounted within the lower housing for rotating the lower roller. The lower housing also provides an automatic or a manual limiter.

Growing community of inventors

Beijing, China

Xiaohua Chen