60results about How to "Guaranteed Coupling Efficiency" patented technology

Disclosed are a laser transceiver device and a laser radar. The laser transceiver device includes a light-splitting coupling unit that splits original light into first original light and second original light, an emerging unit that forms emergent light according to the first original light, and an acquiring unit that acquires echoed light to form signal light, and further includes at least one ofa first acting surface that reflects part of the first original light to form first local oscillating light and a second acting surface that reflects parts of the second original light to form secondlocal oscillating light. Since the first local oscillating light is formed by the first original light partly reflected by the first acting surface and the second local oscillating light is formed bythe second original light partly reflected by the second acting surface, the first local oscillating light and the second local oscillating light have relatively low power, thus the power of the emergent light can be improved effectively, so as to effectively extend the detection distance of the laser radar and expand the detection range of the laser radar while keeping the process and cost unchanged.

A two-dimensional side coupling photonic crystal waveguide single-channel system relates to a microstructure photonic crystal element in the technical field of optics, which can achieve efficient coupling between photonic crystal waveguide and a traditional optical device or an externally-arranged light source. The two-dimensional side coupling photonic crystal waveguide single-channel system adopts a mode that a plurality of photonic crystal resonant cavities are connected in parallel. An electromagnetic wave enters a coupling system formed by parallelly connecting the plurality of photonic crystal resonant cavities from a coupling area in a waveguide second area. The electromagnetic wave with the same waveguide response frequency with the parallelly connected photonic crystal resonant cavities and photonic crystal and photonic crystals enters a defect area through efficient coupling of the plurality of parallelly connected photonic crystal resonant cavities, achieves one-sided transmission in the defect area and emits out through one side of the photonic crystal waveguide, thereby achieving the purpose of improving coupling area. The coupling efficiency is high, and the photoniccrystal waveguide is compact in structure, small in size and high in integration level.