Optical Transmitter

Abstract

Disclosed is a new configuration for improving temperature dependency of optical modulation output characteristics, and an implementation form adapted to each configuration in an optical transmitter in which an optical modulator and a driver IC thereof are integrally packaged. The optical transmitter includes: an optical modulator; a driver integrated circuit (driver IC) for supplying a modulation electrical signal for the optical modulator; a first Peltier device for controlling a temperature of the optical modulator; and a second Peltier device for controlling a temperature of the driver IC, in which the optical modulator and the driver IC are connected by a wire, and the temperature of the second Peltier device is set to be lower than the temperature of the first Peltier device.

Dependencies are inferred from the claim text.