Efficient Multiplexer/Demultiplexer for Visible WDM Transmission over SI-POF Technology

Abstract

This is a postprint version of the following published document: Pinzon, P.J.; Pérez, I.; Vazquez, C. Efficient Multiplexer/Demultiplexer for Visible WDM Transmission over SI-POF Technology.Abstract: A five channel step index plastic optical fiber proposal for a multiplexer/demultiplexer having insertion losses (IL) of 2.9-4 dB, pass bandwidths at −3dB> 30 nm, crosstalk attenuation >30 dB and size of ∼65 mm × 55 mm, is demonstrated. It is based on a reflective diffraction grating with blazed profile and an aspheric lens. The theoretical analysis presented is used to further reduce the system size to ∼37 mm × 30 mm and to increase the number of channels to 8 keeping ILs < 4.5 dB. Experimental results have good agreement with theoretical expectations.

Bandpass transmission filters based on phase shifted fiber Bragg gratings in microstructured polymer optical fibers

“…However, when the laser was switched off, a clear pi-phase shift was found in the FBG transmission spectrum (Figure 7d) and repetitive experimental results confirm that PS-FBG were correctly being fabricated, although, longer exposure times lead to local heating which temporarily avoids to show the PS transmission characteristic. This is due to the high thermo-optic effect in polymers which is 10 times larger than in silica [20]. While the laser is on, the illuminated areas are being heated up and therefore, the refractive index modulation is higher and it results in a temporary strong second grating.…”

“…Present communication systems over POF use a single channel for data transmission, but in recent years, there is a growing interest to develop wavelength division multiplexed (WDM) systems in order to increase the maximum data rate over a single fiber keeping the mentioned advantages [19][20][21]. In such networks, either bulk devices and/or couplers are employed to mux/demux different channels [20]. Fiber Bragg Gratings in POF are required to obtain compact and low cost mux/demux components in WDM-POF networks along medium and short telecommunications distances.…”

Highly Spectrally Efficient Discrete Multi-Tone Transmission over Step Index PMMA optical fibre for Short-Range Optical Communication

“…However, the use of WDM in POF has not yet been widespread for data communication due to the high insertion losses caused by the light multiplexers and demultiplexers [7]. The very high single-wavelength bit-rates already demonstrated over POF prove that WDM for POF is still an open research field.…”

“…Many WDM techniques can have been reported in the literature recently [9][10][11][12]. However, none of them explore the yellow/orange transmission window (560-600 nm) because semiconductors compounds such as GaAsP, AlGaInP and GaP:N are not interesting materials allowing to develop fast, efficient and fiber-integrable sources at such window [7].…”

Discrete Multi-Tone Transmission over Step Index PMMA optical fibre for Short-Range Optical Communication

“…Furthermore, laser diodes (LD), light emitting diodes (LED) and optical filters at different wavelengths became accessible in the market allowing an improvement on transmission capacity by means of wavelength division multiplexing (WDM), which is a consolidated technology for silica fibers [5]. However, the use of WDM in POF has not yet been widespread for data communication due to the high insertion losses caused by the light multiplexers and demultiplexers [6]. The very high single-wavelength bit-rates already demonstrated over POF prove that WDM for POF is still an open research field.…”