Optical Front-End Receiver Design for Optical Wireless Communication System
Arnidza Ramli, Sevia Mahdaliza Idrus, Abu Sahmah Mohd Supa'at, Muhammad Al-Farabi and Muhammad Iqbal
Affiliation: Photonics Technology Laboratory, Fakulti Kejuruteraan Elektrik, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor Bahru, Johor, Malaysia.
This paper presents a bootstrapping technique that is applicable for various large window photodetectors by introducing a variable feedback capacitor to the front-end system. Two types of optical front-end receivers; Transimpedance amplifier (TIA) and Bootstrap transimpedance amplifier (BTA) were simulated and the performances of both architectures were compared. With the photodiode input capacitance compensation, the BTA improves the systems performance in which up to 670% increase was exhibited in the systems bandwidth. On the other hand, using the variable feedback capacitor in the circuit design, the fidelity of the system response was improved. This article also refers some recent patent on optical wireless receiver designs.
Keywords: Bootstrap transimpedance amplifier, large window photodetector, optical wireless communication, Preamplifier Architectures, Transimpedance amplifier, Photodiode model, TIA and BTA Modeling, Various PIN Photodetector
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