Browsing by Author "Samarawickrama, Y. C"

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    PublicationEmbargo
    Low cost fiber optic teaching aid with wide dynamic range optical power meter and bandwidth analyzer
    (IEEE, 2015-04-07) Samarawickrama, Y. C; Thilakumara, R. C
    Fiber optic communication technology is an essential component in any Electrical Engineering curriculum. Unfortunately the expensive fiber optic communication equipment is a major drawback in teaching fiber optics theories and principles especially in the 3 rd world countries. This paper presents a development of a low cost Fiber optic power meter and a bandwidth analyzer to be used in laboratories as a teaching aid. Both power meter and analyzer are designed to operate at 850nm, 1310nm and 1550nm optical wavelengths. Analyzer measures the bandwidth of a modulated optical signal up to 500 MHz. The logarithmic amplifier enhances the power meter dynamic range. The cost of the product is less than 100 US dollars at small scale production and can be further reduced if mass produced.
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    PublicationOpen Access
    Low Cost Optical Power Meter and Bandwidth Analyser with Wide Dynamic Range
    (researchgate.net, 2014-12-16) Samarawickrama, Y. C; Thilakumara, R. P
    Fiber optic communication is a booming technology in the field of telecommunication due to the advantages over traditional communication systems. It is a timely requirement to produce optical equipment at low cost and reasonable measurement accuracy. This research is about designing of an optical power meter and analyser that can be used in laboratories for educational experimental purposes and for optical signal power measurements to troubleshoot connectivity of optical links. Analyser measures the bandwidth of a modulated optical signal up to 500MHz.Both power meter and analyser can be used for 850nm, 1310nm and 1550nm optical wavelengths. Photodiodes, Logarithmic conversion amplifiers, Trans impedance amplifiers are the main components used in the design. Integrated power meter and analyser, low cost, reasonable measurement accuracy and data logging capability are outstanding features.