Implementation of the Audio Signal Transmission System Using Wavelength Division Multiplexing

The idea of this paper is to utilize the advantages of the optical fibers over conventional wiring methods in order to construct a system for transmitting analog stereo audio signal. The main goal is to create a low-cost analog stereo audio transmitting system using one optical fiber, with sophisticated sound quality. The system was built for transmitting an analog audio signals over plastic optical fiber by applying multiplexing over wavelengths. This method enables the transmitting of two analog audio signals over a single optical fiber. As a result, the audio signal can be transmitted over long ranges and using only one transmitting medium. In comparison with coaxial wired analog audio systems, optical fiber wired analog audio system has better signal-to-noise ratio, better frequency response and wider bandwidth.