Polymer Optical Fiber Application Center

Nürnberg, Germany

Polymer Optical Fiber Application Center

Nürnberg, Germany

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Surkova G.,Tomsk State University of Control Systems and Radioelectronics | Kruglov R.,Polymer Optical Fiber Application Center | Lwin R.,University of Sydney | Leon-Saval S.G.,University of Sydney | And 3 more authors.
Optical Fiber Technology | Year: 2017

In contrast to conventional polymer optical fibers (POF) microstructured POF (mPOF) provide an additional opportunity to control the optical properties of the propagating signals. A particular arrangement of the air holes allows to reduce the number of waveguide modes and thus overcome the bandwidth limitation which is inherent for step-index POF. In this paper we report on the implementation of a 50 m data transmission link based on mPOF with a single ring of holes and a core diameter of 180 μm. A bit rate of 7 Gb/s was achieved at a bit-error ratio (BER) of 10−3 employing on-off keying modulation technique and an offline-processed symbol-spaced decision feedback equalizer. Discrete multitone modulation provided a bit rate of 8.07 Gb/s at BER of 10−3. © 2017 Elsevier Inc.


Vinogradov J.,Polymer Optical Fiber Application Center | Kruglov R.,Polymer Optical Fiber Application Center | Chi K.-L.,National Central University | Shi J.-W.,National Central University | And 3 more authors.
IEEE Photonics Technology Letters | Year: 2014

We report a high-speed data transmission over a 1-mm diameter step-index polymer optical fiber (SI-POF) with GaN light-emitting diodes (LEDs) operating at 435 and 475 nm. The modulation bandwidths of the LEDs at 40 mA were 180 and 300 MHz, respectively. A maximum bit rate of 5.5 Gb/s was achieved with a 475-nm GaN LED at -1.8-dBm fiber-coupled power over a 1-m SI-POF employing 4-pulse-amplitude modulation format. Compared with the performance of a high-speed red resonant-cavity LED under the same test setup, the chromatic dispersion reduces the potential of the GaN LED-based system when the transmission distance is longer than 30 m. © 1989-2012 IEEE.


Loquai S.,Polymer Optical Fiber Application Center | Bunge C.-A.,Deutsche Telekom AG | Ziemann O.,Polymer Optical Fiber Application Center | Schmauss B.,University of Erlangen Narnberg | Kruglov R.,Polymer Optical Fiber Application Center
Journal of Lightwave Technology | Year: 2010

A fully analytic analysis of the frequency response of a homo-structure p-i-n photodiode is developed to characterize high-speed large-area p-i-n photodiodes. Therefore, the model can easily be implemented in mathematical simulation tools for system analysis. The model accurately describes drift-, diffusion- and parasitic effects and has been experimentally verified up to 3 GHz for a variety of different wavelength from 405 nm to 850 nm far beyond the 3 dB cutoff frequency (up to -35 dB). © 2010 IEEE.


Ziemann O.,Polymer Optical Fiber Application Center | Poisel H.,Polymer Optical Fiber Application Center
24th International Conference on Plastic Optical Fibers, POF 2015 - Conference Proceedings | Year: 2015

The POF-AC Nürnberg was founded in September of 2000. This year, we can look back on one and a half decade of successful work in different areas of the application of POF and other large diameter optical fibers. The maximum bit rate on 1 mm core diameter POF increased from 1 Gbit/s to 40 Gbit/s over this period. Wavelength multiplexing, bend insensitive multi core POF and high bit rate optical rotary joints are examples for the development of the POF technology.


Fischer J.,Polymer Optical Fiber Application Center | Luber M.,Polymer Optical Fiber Application Center | Ziemann O.,Polymer Optical Fiber Application Center
24th International Conference on Plastic Optical Fibers, POF 2015 - Conference Proceedings | Year: 2015

This paper describes the measurement and the influence of the ratio between lateral light hitting a multimode fiber and light captured in the fiber, the so called coupling efficiency. This coupling efficiency depends among others on the position along the fiber axis, the wavelength and the angle of the incoming rays with respect to the fiber axis. For the measurement of the coupling efficiency, the lateral light is coupled over the entire solid angle into the fiber using an integrating sphere. For the measurement of the influence of the angle referring to the fiber axis a collimated laser beam is used. The determination of the wavelength dependence was achieved by using different light sources or by measuring the different spectra of the incoming lateral light and the spectrum of the captured light at the fiber end.


Becker T.,Polymer Optical Fiber Application Center | Loquai S.,Polymer Optical Fiber Application Center | Ziemann O.,Polymer Optical Fiber Application Center | Poisel H.,Polymer Optical Fiber Application Center | Schmauss B.,Friedrich - Alexander - University, Erlangen - Nuremberg
24th International Conference on Plastic Optical Fibers, POF 2015 - Conference Proceedings | Year: 2015

We investigate effects that occur in large core (1 mm) step index (SI) polymer optical fibers (POF) when exposed to temperature changes. The volume of Polymethylmethacrylate (PMMA) and hence the length of a SI-POF is known to increase with rising temperatures due to thermal expansion. On the other hand its refractive index is also temperature-dependent and decreases when the fiber is heated. A ray of light travelling along the fiber is therefore facing two contrary effects: The geometrical length of its path through the fiber increases while it is propagating at a higher speed. As a consequence also the modal dispersion of the fiber depends on the temperature. The effects are evaluated in an experimental setup and are in good agreement with a corresponding ray tracing simulation.


Gehrke M.,Polymer Optical Fiber Application Center | Loquai S.,Polymer Optical Fiber Application Center | Ziemann O.,Polymer Optical Fiber Application Center | Schmauss B.,Friedrich - Alexander - University, Erlangen - Nuremberg
24th International Conference on Plastic Optical Fibers, POF 2015 - Conference Proceedings | Year: 2015

This paper presents a new simulation approach to obtain angular time domain backscatter signals of large core (1 mm) step index polymer optical fibers (POF) based on the time dependent power flow equation. In this model the three major fiber impairments mode coupling, modal attenuation and modal dispersion are taken into account as functions of the axial propagation angle. Chromatic and material dispersion are neglected due to typically less significant consequences regarding the transmission characteristics of the fiber. The development of the propagation along the fiber is hereby described by combination of a diffusion and an attenuation process. The required Rayleigh backscatter model is calculated from the turbidity based upon the molecular structure of an amorphous polymer glass.


Schueppert M.,University of Applied Sciences of Leipzig | Kruglov R.,Polymer Optical Fiber Application Center | Loquai S.,Polymer Optical Fiber Application Center | Bunge C.-A.,University of Applied Sciences of Leipzig
IEEE Photonics Technology Letters | Year: 2015

Nonlinear signal distortions originated in a resonant-cavity light emitting diode (RC-LED) are investigated. Using laboratory measurements and offline processing, the RC-LED's nonlinear behavior is investigated for multilevel pulse amplitude modulation (M-PAM) and carrierless amplitude and phase modulation with the help of a Volterra-series expansion. Dynamic nonlinearities are identified which are strongly dependent on the modulation format used. The impact of these nonlinearities is then investigated for a short-range gigabit transmission link, consisting of a RC-LED and 30 m of step-index polymer optical fiber. It is shown that dynamic nonlinearities are a dominat source of signal impairments when using M-PAM at lower baud rates and that the performance of M-PAM can be considerably improved with a Volterra-series extension of a decision feedback equalizer (DFE) compared with a regular DFE. © 1989-2012 IEEE.


Xu J.,Polymer Optical Fiber Application Center | Bloos M.,Polymer Optical Fiber Application Center | Poisel H.,Polymer Optical Fiber Application Center
POF 2014 - 23rd International Conference on Plastic Optical Fibers, Proceedings | Year: 2014

We evaluate how the computation of connector losses is influenced by an improved set of information of the radiation pattern at the end of polymer optical fibers with different lengths. Applied in a raytracing software this set of rays is used to compute the coupling efficiencies for lateral-, longitudinal- and angular offsets of standard 1 mm SI-POF under different launching conditions. The results are compared to previously published values using the far field distribution only and partly to concrete measurements. © 2014 ICPOF.


Joncic M.,Hochschule Harz University of Applied Sciences | Kruglov R.,Polymer Optical Fiber Application Center | Haupt M.,Hochschule Harz University of Applied Sciences | Caspary R.,TU Braunschweig | And 2 more authors.
IEEE Photonics Technology Letters | Year: 2014

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 high-speed 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 four-channel 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). © 2014 IEEE.

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