STUDY AND DESIGN THE OPTICAL ADD-DROP MULTIPLEXER BASED ON ASYMMETRIC BRAGG COUPLER

• Main Author: (NIM 202 04 004), Muldarisnur
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/8743
• Institution: Institut Teknologi Bandung

Abstract : <br /> <br /> <br /> This thesis report a theoretical investigation of the optical add-drop multiplexer (OADM). OADM is the key component in the WDM (wavelength division multiplexing) system, the technology to transmitting multi wavelengths data stream on the single fiber simultaneously without mutual interference. In the WDM system, add-drop multiplexer was used to choose specific wavelength from multi wavelengths data stream which propagate in an optical channel then drop it to another optical channel. The add-drop multiplexer structure which is considered in this thesis consist of two one dimensional planar waveguide which separated each other at a distance. The refractive index of the second waveguide is modulated to create a grating that has a photonics band gap (PBG). Wavelengths (frequency) inside the PBG cannot propagate through the grating, thus this wavelength is dropped from the data stream. This add-drop structure is known as asymmetric Bragg coupler (ABC). The analysis is done using the coupled mode theory based on Lorentz reciprocity theorem. Analytical solution (result) will simulate to see the effect of device parameter variation to the device performance to looking for optimal performance, such as: maximum drop transmittance and minimum insertion loss. Device performance consist of mid gap position, band gap width, and insertion loss of the device. <br />