Optical module

An optical module, comprising:

• a circuit board including a first circuit board ground line, a second circuit board ground line and a circuit board signal line;
• a light emitting assembly connected to the circuit board;
• wherein the light emitting assembly includes:
• a spacer including a first spacer ground line, a second spacer ground line and a spacer signal line, the first spacer ground line being connected to the first circuit board ground line through a first connection line, the spacer signal line being connected to the circuit board signal line through a second connection line, and the second spacer ground line being connected to the second circuit board ground line through a third connection line;
• and
• a laser chip disposed on the spacer and configured to emit an optical signal based on an electrical signal from the circuit board, an anode of the laser chip being electrically connected to the spacer signal line, and a cathode of the laser chip being electrically connected to the first spacer ground line or the second spacer ground line;
• wherein connection relationships among the first spacer ground line, the second spacer ground line, the first circuit board ground line and the second circuit board ground line include at least one of the followings:
• the first spacer ground line is connected to the second spacer ground line through a fourth connection line;
• the first spacer ground line is connected to the second circuit board ground line through a fifth connection line;
• the second spacer ground line is connected to the first circuit board ground line through a sixth connection line;
• or,
• the first circuit board ground line is connected to the second circuit board ground line through a seventh connection line;
• wherein the circuit board further includes:
• a circuit board ground layer, the circuit board ground layer being disposed on a surface of the circuit board opposite to a surface on which the first circuit board ground line and the second circuit board ground line are located;
• and
• a circuit board ground hole corresponding to at least one of the first circuit board ground line or the second circuit board ground line, the circuit board ground hole penetrating the circuit board, so that the at least one of the first circuit board ground line or the second circuit board ground line is electrically connected to the circuit board ground layer.