An electroabsorption modulated laser is formed to include a Fabry-Perot lasing section, in place of the conventional DFB lasing section. On the other hand, the unenclosed portion of the core body is wound with a string of conductor to form several coils, then both terminals of the coil are soldered to emerge conductor plate terminals thereby forming a wound type inductor element for SMD. The complexes are designed to efficiently carry out a variety of olefin metathesis reactions. The poly glucan) employed was synthesized by fermentation. The variable pulse position modulation signal generation unit controls a pulse position and a pulse width within a unit pulse section of a pulse that controls the light source based on the information about the operation of the vehicle and the brightness control value.