High-density miniature optical branching device

The utility model discloses a high-density miniature optical branching device. The utility model relates to the field of optical splitters. The optical branching device comprises an optical branchingdevice box body, an input optical fiber penetrates into the optical branching device box body and is connected with one input end of a first-stage PLC chip arranged in the optical branching device boxbody; a plurality of optical amplifiers are also arranged in the optical branching device box body; the input end of each optical amplifier is connected with the output end of the first-stage PLC chip through a first connecting optical fiber. A plurality of second-stage PLC chips in one-to-one correspondence with the plurality of optical amplifiers are also arranged in the optical branching device box body; the output end of each optical amplifier is connected with one input end of the corresponding second-stage PLC chip through a second connecting optical fiber, the output end of each second-stage PLC chip is connect