Photoelectric coupling device

The utility model discloses a photoelectric coupling device which comprises an FA or PLC array, a glass substrate, a glass cover plate, a refraction focusing lens, a PD array and a heat sink, the glass substrate is arranged on the glass cover plate, the FA or PLC array is arranged between the glass substrate and the glass cover plate in a penetrating mode, and the front end of the glass substrate and the front end of the glass cover plate are provided with first abutting surfaces; a second abutting surface abutting against the first abutting surface is arranged at the rear end of the refraction focusing lens, a total reflection surface is arranged on the refraction focusing lens, and a spherical array is arranged at the bottom of the refraction focusing lens; the PD array is mounted on the heat sink, and the PDs in the PD array are arranged in one-to-one correspondence with the focusing spherical surfaces in the spherical surface array; light output by the FA or PLC array enters the refraction focusing lens t