Semiconductor photonic integrated circuit for high-density WDM light source

Recent progress in semiconductor optical devices and their fabricatin technique has brought about a possibility to develop various kinds of semiconductor photonic integrated circuits (SPICs) [1,2]. We report, here, a 1.5um range four-channel light source SPIC, which consists of four wavelength-tunable LDs and four light intensity modulators and two waveguide couplers, aming at high-density WDM optical system application.