Optical module
This application provides an optical module, and relates to the field of optical communication. An optical module provided in the embodiments of this application includes a laser box and a silicon photonic chip that are enclosed and packaged by an upper enclosure part and a lower enclosure part. The laser box is disposed on and is in contact with the surface of the silicon photonic chip by the side wall or the base. The laser chip is disposed on the top plane of the laser box. The top plane is in contact with the upper enclosure part for heat dissipation, so as to help heat generated by the laser chip be conducted to the upper enclosure part via the top plane, so that the heat generated by the laser chip is dissipated not via the silicon photonic chip.
1. An optical module, comprising an upper enclosure part, a lower enclosure part, and a laser box and a silicon photonic chip that are enclosed and packaged by the upper enclosure part and the lower enclosure part, wherein:
the laser box with a top plane and a side wall is disposed on a surface of the silicon photonic chip, wherein an enclosed cavity is defined by the top plane and the side wall of the laser box and the surface of the silicon photonic chip;
the laser box comprises:
a laser chip provided on the top plane on a side inside the enclosed cavity, and the top plane on a side outside the enclosed cavity is in contact with the upper enclosure part for heat dissipation; and
a focusing lens and a light-reflecting plane provided in the enclosed cavity, wherein light emitted by the laser chip is suitable for being incident to the light-reflecting plane through the focusing lens; and
wherein the optical module further comprises a circuit board and a heat conductive substrate, wherein the circuit board has an opening that passes through an upper surface and a lower surface of the circuit board, the silicon photonic chip is disposed in the opening, and the heat conductive substrate is disposed between the silicon photonic chip and the lower enclosure part and directly in contact with the lower enclosure part.
2. The optical module according to claim 1 , wherein the heat conductive substrate is in a platform protruding shape, the silicon photonic chip is disposed on a protruding platform of the heat conductive substrate, and the circuit board is supported on a recess part of the heat conductive substrate.
3. The optical module according to claim 1 , wherein the laser box further comprises an isolator, wherein the isolator, the focusing lens, and the light-reflecting plane are disposed on the top plane, respectively, and the isolator is located between the light-reflecting plane and the focusing lens.
4. An optical module, comprising an upper enclosure part, a lower enclosure part, and a laser box and a silicon photonic chip that are enclosed and packaged by the upper enclosure part and the lower enclosure part, wherein
the laser box comprises a top plane, a side wall, and a base, wherein
a laser chip is provided on the top plane on a side towards the base, and the top plane on a side away from the base is in contact with the upper enclosure part for heat dissipation;
an accommodation recess is formed on an upper surface of the base, for accommodating the laser chip, a focusing lens, and a light-reflecting plane, wherein light emitted by the laser chip is suitable for being incident to the light-reflecting plane through the focusing lens; and
a lower surface of the base is in contact with a surface of the silicon photonic chip,
wherein the optical module further comprises a circuit board and a heat conductive substrate, wherein the circuit board has an opening that passes through an upper surface and a lower surface of the circuit board, the silicon photonic chip is disposed in the opening, and the heat conductive substrate is disposed between the silicon photonic chip and the lower enclosure part and directly in contact with the lower enclosure part.
5. The optical module according to claim 4 , wherein the heat conductive substrate is in platform protruding shape, the silicon photonic chip is disposed on a protruding platform of the heat conductive substrate, and the circuit board is supported on a recess part of the heat conductive substrate.
6. The optical module according to claim 4 , wherein the laser box further comprises an isolator, wherein the isolator, the focusing lens, and the light-reflecting plane are disposed on the top plane, respectively; and the isolator is located between the light-reflecting plane and the focusing lens.
7. An optical module, comprising an upper enclosure part, a lower enclosure part, an electrical connection board, a laser chip, and a laser box, a silicon photonic chip, and a circuit board that are enclosed and packaged by the upper enclosure part and the lower enclosure part, wherein
the laser box with a top plane and a side wall is disposed on a surface of the silicon photonic chip, wherein a cavity is defined by the top plane and the side wall of the laser box and the surface of the silicon photonic chip;
the electrical connection board horizontally extends into the enclosed cavity;
the laser chip is disposed on a surface of the electrical connection board towards the silicon photonic chip in the cavity, and a surface of the electrical connection board away from the silicon photonic chip is attached on the top plane; and
the electrical connection board at an end outside the cavity is electrically connected to the circuit board,
wherein the optical module further comprises a heat conductive substrate, wherein the circuit board has an opening that passes through an upper surface and a lower surface of the circuit board, the silicon photonic chip is disposed in the opening, and the heat conductive substrate is disposed between the silicon photonic chip and the lower enclosure part and directly in contact with the lower enclosure part.
8. The optical module according to claim 7 , wherein on the surface of the electrical connection board towards the silicon photonic chip is provided a circuit;
wherein, on the surface of the electrical connection board away from the silicon photonic chip outside the cavity is provided a pad; and
wherein the circuit is electrically connected to the pad through a through via, and the pad is electrically connected to the circuit board.
9. The optical module according to claim 7 , wherein on the surface of the electrical connection board towards the silicon photonic chip is provided a circuit;
on the surface of the electrical connection board away from the silicon photonic chip outside the cavity is provided a pad;
on a side surface of an end portion of the electrical connection board outside the cavity is provided an electrical connection layer, so as to connect the circuit and the pad; and
the pad is electrically connected to the circuit board.
10. The optical module according to claim 7 , further comprising a blocking member that is located between the top plane and the surface of the silicon photonic chip, to clamp and hold the electrical connection board in cooperation with the top plane.
11. The optical module according to claim 7 , wherein the pad is electrically connected to the circuit board by a bonding wire or a flexible printed circuit board.