48results about How to "Reduce outside distractions" patented technology

The invention relates to a polarization-maintaining multi-core fiber. The polarization-maintaining multi-core fiber comprises a plurality of fiber core areas and a total outer cladding layer, wherein the plurality of fiber core areas comprise a central fiber core area and two or more than two outer fiber core areas which are uniformly distributed on the periphery of the central fiber core area at equal intervals. The central fiber core area is a polarization-maintaining fiber core area, each outer fiber core area comprises a fiber core and an inner cladding warping a core layer, and the part out of the fiber core areas is a total outer cladding. The polarization-maintaining multi-core fiber can greatly enhance the spectrum efficiency of the optical transmission system and can improve the optical fiber communication capacity, and the polarization-maintaining fiber core area is arranged to ensure that a waveguide structure has the function of maintaining polarized light and can be used for conducting local oscillator light. In the occasions such as a high-capacity access network of the self-coherent detection or the interconnection of data centers, the polarization certainty of local oscillation light can be improved, an automatic polarization controller is saved, the complexity of a photoelectric device and a DSP (digital signal processor) at a receiving end is reduced, and the system delay is greatly reduced, so that the system cost is reduced.

An optical keyswitch includes a casing having a movable portion, a shaft movably disposed on the casing, a resilient member accommodated in the casing, and a switch module including a circuit board, an emitter, and a receiver. The emitter emits an optical signal along an optical path to the receiver. When the shaft is at a non-pressed position, the movable portion has a first spatial relation with the optical path, and the receiver receives the optical signal of a first intensity. When the shaft moves, in response to a pressing force, to a pressed position, the shaft compresses the resilient member and pushes the movable portion to move, so the movable portion no longer has the first spatial relation with the optical path, the optical signal received by the receiver has a second intensity different from the first intensity, and the switch module is triggered to generate a triggering signal.

There is provided an underwater measurement system (20, 30, 40) for monitoring an underwater region (10). The system (20, 30, 40) includes a sensor assembly operable to sense at least one physical variable in the region (10) for generating at least one corresponding sensor signal, and a data processing arrangement (170, 510, 520) for processing the at least one sensor signal to generate processed data for presentation and / or logging. The sensor assembly (20) includes one or more voltage sensors (190) configured to sense electric fields present in the underwater region (10) and provide information in the at least one signal indicative of the electric fields. Moreover, the sensor assembly (20) includes one or more hydrophones (200) operable to receive sonic energy generated in the underwater region (10) and to include corresponding information in the at least one sensor signal for communicating to the data processing arrangement (170, 510, 520).

A method and apparatus provide fluid treatment at a plurality of distinct points utilizing magnetic energy concentrated in a plurality of distinct areas along a fluid flow path and at least one region of pulsed fluid treatment within a fluid treatment chamber. The instant invention prevents the formation and accumulation of contaminants within conduits and on equipment utilized in the transportation, delivery and processing of fluid columns. It may also be utilized to accelerate the separation of oil and water and increase the efficiency of oil / water separation equipment.