Abstract
Problem statement: The characteristics of a laser diode are highly dependent on the temperature of the laser chip. Thus, the effect of temperature on the network performance of uncooled semiconductor laser diode are studied by simulating its equivalent electrical circuit, developed from the rate equations that governing optical components directly into an electrical simulation framework. Approach: The simulations are carried out using circuit analysis program named OptiSPICE and Opti System. On this simulation study, the analysis is done based on three parameters in order to determine the quality of received signal which are; center wavelength, bandwidth and output power. Results: As the temperature variance is fed to the laser diode through an external thermal noise, the result will shows that the ambient temperature of laser diode is varied with time. In this case, the performance of laser diode will decreases as the operating temperature increases or, conversely the performance increases as the operating temperature decreases. Conclusion: The circuit design must be simulated using a SPICE engine that incorporates both electrical and optical models, which is Opti SPICE software. It cannot be simulated using traditional software packages because they do not provide sufficient coupling between electrical and optical devices.
Highlights
A laser is a device that emits light through a process called stimulated emission
This is not true of all lasers, : some emit light with a broad spectrum, while others emit light at multiple distinct wavelengths simultaneously (Silfvast, 2004). Communication tools such as mobile phone and internet have been widely used and supported our daily lives. Many of those systems are based on broadband optical fiber communication systems key components are optical sources and optical receivers, especially Semiconductor Laser Diode (SLD)
A SLD is related with a term of threshold density of a driving current or threshold current, when the laser diode operating mode is changed from incoherent to laser
Summary
A laser is a device that emits light through a process called stimulated emission. The term laser is an acronym for Light Amplification by Stimulated Emission of Radiation. This is not true of all lasers, : some emit light with a broad spectrum, while others emit light at multiple distinct wavelengths simultaneously (Silfvast, 2004) Today, communication tools such as mobile phone and internet have been widely used and supported our daily lives. SLD lasing at 1.3 and 1.55 μm-band are mainly used as the optical sources and their reliability are very important for maintaining their performance in the systems (Ab-Rahman and Hassan, 2010a) In this simulation study, focus is on SLD. When considering of uncooled SLD in high speed optical communication system, it is high of importance to keep the temperature variation as optimum as possible It is because; the changes in temperature will translate into changes in wavelength and optical power of SLD. It is important to discuss on an examination of performance of SLD on a temperature variation because by theoretical study, laser thresholds are depends on temperature
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