Miniaturized DPSK decoding receiver

The invention discloses a miniaturized DPSK (Differential Phase Shift Keying) decoding receiver, belongs to the field of optoelectronic devices. The invention aims to overcome the defect that an existing decoder and an existing receiver are two separate and independent devices, and optical fiber array coupling (VGA) is used for coupling output light of the decoder into an optical receiver. The decoder and the optical receiver are efficiently coupled into a whole through optical fiber array coupling (VGA) and are packaged in the same metal box to form a decoding receiver integration, and two independent and separated decoders and receivers are replaced. The integrated demodulation receiver which is smaller in packaging size and lower in production price is manufactured. In the packaging process, the box is sealed in vacuum at the outlet of the optical fiber by using a sealing element. According to the integrated system, vacuum packaging of the decoder and the receiver in the same shell is realized, and the rel