Abstract: The present invention provides an optical signal control method, an optical signal control system and an optical backplane system, which belongs to the field of optical communications technologies. The method includes: detecting whether a circuit board is pulled out from an optical backplane; if the circuit board is pulled out, querying a transmitting port of another circuit board connected to a slot where the pulled out circuit board is located, transmitting a first control instruction to the transmitting port, and notifying of closing the transmitting port or adjusting output power of the transmitting port to make it below a preset threshold. The optical signal control system includes: a detection module and a control module. The optical backplane system includes the optical signal control system.

Abstract: Embodiments of the present invention provide an optical backplane interconnection system and a communication device. The optical backplane interconnection system includes a backplane, a front board, a rear board and a connector. The front board and the rear board locate on two sides of the backplane and are orthogonal to each other. The front board and the rear board are both disposed with an optical waveguide path which is interconnected through a connector connected to the backplane to form an optical path, so that optical signals can be transmitted through the optical path.