Optimierte Verdrahtung einer Laserdiode und eines integrierten Modulators auf einem Träger

摘要

An optical transmission module of the invention uses a semiconductor chip (22) forming an optical modulator integrated laser on a semi-insulating semiconductor board (23). An input transfer line (27) and an anode electrode of an optical modulator element (21) are connected by a first bonding wire (31). The anode electrode of the optical modulator element (21) and one of the ends of a terminal resistor element (24) are connected by a second bonding wire (32). A cathode electrode of the optical modulator element (21) and the other end of the terminal resistor element (24) are connected by a third bonding wire (33). The cathode electrode of the optical modulator element (21) and a ground electrode (25) are connected by a fourth bonding wire (34). A joint portion between the first bonding wire (31) and the input transfer line (27) is arranged on an opposite side to a joint portion between the fourth bonding wire (34) and the ground electrode (25) while interposing the semiconductor chip (22) between them.