Study on Coarse Wavelength Division Multiplexing Using Polymer Optical Fiber Transmission Window

摘要

Inexpensive PMMA based Polymer Optical Fiber (POF) has the feature of a large core diameter, high numerical aperture and great flexibility, thus allow low connection cost and cheap LED source. These advantages make it a promising candidate for short distance communication. In this article, coarse wavelength division multiplexing (CWDM) test was performed with commercially available POF using its low loss transmission window. Light of two different wavelengths (650nm and 530 nm) were sending on a single POF. Here 650nm red light was used for duplex IP data digital signal transmission and 530 nm green light was used for voice signal transmission. Light sources are LEDs. A POF Coupler (Splitter) of 1:1 ratio was employed as multiplexer and prisms were used for demultiplexing. The channel isolation and insert loss of both channels were measured, for 650 nm channel they are 20.5dB and 17.65dB, for 530 nm channel they are 19.16dB and 20.55dB.