Chapter 13 provides an overview of fabrication techniques of integrated guided-wave photonic modulators, basic principles of modulation schemes and transmission medium, and single mode or few mode fibers. These chapters also investigate Si-integrated photonic circuits (Si-PIC), which are currently attracting significant interest because of their integrability with CMOS micro-electronics. This technology may emerge as an essential technique to integrate electronics and photonics on the same electro-photonic integrated circuits (e-PIC) chip, leading to significant reduction of the total product cost using automatic CMOS technology production line. Chapter 13 examines the 3D the ridge type waveguide, which is commonly employed in the design of lasers and optical amplifiers.