Four-Channel WDM Transmission Over 50-m SI-POF at 14.77 Gb/s Using DMT Modulation

Abstract

Wavelength division multiplexing (WDM) is a promising solution for upgrading the capacity of polymer optical fiber (POF)-based telecommunication networks. In this letter, we report on the successful realization of a four-channel highspeed WDM transmission system for 1-mm diameter step-index POF (SI-POF). For combining the optical signals coming from 405-, 450-, 515-, and 639-nm laser diodes onto 1-mm SI-POF, a 4 × 1 coupler with low insertion loss (IL) has been developed. To spatially separate different wavelength channels, a fourchannel demultiplexer with low IL (<5.7 dB) and high (non)adjacent channel isolation (>30 dB) has been realized in bulk optics. The 14.77-Gb/s data transmission based on the offline-processed discrete multitone modulation technique has been demonstrated over 50-m SI-POF at a bit-error rate of 10 −3 .Index Terms-Demultiplexer, optical interconnections, optical fiber communication, polymer optical fiber, visible diode lasers, wavelength division multiplexing.

Visible CWDM system design for Multi-Gbit/s transmission over SI-POF

“…This value includes the IL produced by two polished surfaces. IL uniformity in a 5 channel configuration is 1.3 dB, more than 1dB below the 4 channel configuration reported in [6] and it is reduced below 0.9 dB in a 4 channel configuration. It is also shown that the spectral bandwidth at -25 dB is higher than 38 nm.…”

“…A CWDM configuration with 4 channels is going to be considered for comparison purposes with the solution reported in [6]. For the worst case channel, a power budget improvement of 3.6 dB is achieved (2.1 dB in the DEMUX IL and 1.5dB in the MUX IL), see Table I, in an overall power budget of 18dB.…”

“…Current proposals of CWDM over SI-POF are based on spectral grids [5] with channels between 400nm and 700nm using laser diodes (LDs) or light emitting diodes (LEDs). Some designs to reach data rates of 14.77 Gb/s, with 4 channels via up to 50 m of a SI−POF have been developed [6] using this approach but those rates are reached by offline-processing discrete multitone modulation. Initially, transmission with SI-POF has been realized with only one channel, typically at 650 nm, reaching data rates of 100 Mb/s over links of 275 m [7]; even multi−gigabit transmission over links of 50 m has been reached [8].…”

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

“…These advantages will provide a broad tuning range either straining or heating the fiber, and easy handling due to its low stiffness and therefore, lower installations cost. However, the product of bandwidth and channel length is somewhat reduced due to higher loss [13] and they are suitable for in-building and short range applications.…”

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

“…On the other hand, a new wavelength optical carrier can be added to a WDM system if new optical sources and filters are developed. 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].…”