There is provided a smoke generating device for use with a vaporizing material. In one embodiment, an optical engine includes a low-speed transmit line, a low-speed receive line, a high-speed data lane, an optical transceiver device, and a control circuit. The resulting structure, which is less than half a wavelength long, emits a broadband beam that can be coupled into an optical fiber. Diagonal struts space apart and connect the internal and external networks. This ensures communication devices to stably transmit and receive the data group even when the interval between the data groups after the character conversion is different from the interval between the data groups before the character conversion due to timing caused by the character conversion of the data.