Studying and improvement of Laser Diode Driver performance at 1Gb/s in optical communication system

Luqman Sufer Ali, D.; Abdulkhaliq Thannon, Marwan

doi:10.33899/rengj.2011.27042

	Studying and improvement of Laser Diode Driver performance at 1Gb/s in optical communication system
Al-Rafidain Engineering Journal (AREJ)
Article 7, Volume 19, Issue 2, 2011, Pages 38-49 PDF (0 K)
DOI: 10.33899/rengj.2011.27042
Authors
D. Luqman Sufer Ali; Marwan Abdulkhaliq Thannon
Abstract
ABSTRACT The Laser Diode Driver (LDD) is an important part in optical communication system; it acts as an interface between the data source and the optical source (Laser). The design of this circuit using CMOS technology which has low conductivity (gm), (less than from bipolar technology), is a challenge for designers especially at high data rate (>1 GB/s) because LDD must provide high current swing to obtain large optical output power. In this research a simulation software using Personal Simulation Program with IC Emphasis PSPICE (2006) is used to study the performance of the LDD circuit using (0.18µmCMOS technology) at (1 GB/s), the peak to peak jitter is (110ps). In addition analyzing an automatic power control circuit, so that when changing the temperature from (0 – 80˚C) the Laser current changing is (5mA), and an improvement of reference voltage circuit has been added, since a constant voltage (319mV) achieved when the power supply voltage changes from (2.15-6V). Keywords: Laser Diode Driver , pre-driver , Extinction Ratio.
Keywords
KEYWORDS; Pre; driver; Extinction Ratio

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