Introduction

Silicon is by far the most used material in 21st century due to huge demand on communication and data exchange. After 40 years of constant improvement in transistor gap size, microchip industry struggle with quantum effects at 1-5 nanometers scale. Exponential increase in demand forced scientific and business area to find new ways in order to supply in high speed, quality and volume.
In visible spectrum, silicon is opaque, so that it is not possible to transmit light inside, but adapting light wavelength as Infrared, silicon can be used as a transparent medium, and allows to use transmitting data in much more speed, to be exact, the speed of light, like fiberoptics. CMOS manufacturing is mature due to ICs experiences more than 40 years, and in that time area, silicon is mostly used in production. By adapting the same foundations, silicon photonics can be manufactured in high volume and low cost. 
Interferometry has been used in so many diversed areas, from detection of the speed of light, to detection of gravitational waves. Main idea behind interferogram is the wave nature of light. If two waves are in phase, cumulative effect will be higher than alone, and it is called as constructive interference. On the contrary, if there is a 180 degree phase difference, they will cancel each other, and this is called as destructive interference.