Juri Vinogradov

Comparison of PAM and CAP Modulation Schemes for Data Transmission Over SI-POF

An experimental comparison of multilevel modulation schemes for polymer optical fiber (POF) transmission systems is shown in this letter. The performance of a non-return-to-zero, pulse-amplitude modulation (PAM), and carrierless amplitude phase (CAP) modulation was tested under the different conditions, including various link lengths and fiber-coupled power. As an optical transmitter, the commercial laser diode operating at 655 nm was used. A maximum bit rate of 5 Gb/s over 50-m 1-mm step-index POF link was achieved with 16-CAP modulation format at +6 dBm fiber-coupled power and a bit-error ratio of 10-3. Over 100 m, a maximum bit rate of 3.4 Gb/s was realized with 4-PAM.

10 Gbit/s over 25 m plastic optical fiber as a way for extremely low-cost optical interconnection

In this paper we demonstrate for the first time that large diameter (½ to 1 mm) step index POF can be used for 10 Gbit/s transmission over up to 25 m with very low-cost components and DMT modulation. The use of bend insensitive multi-core POF reduces the bending radius to 2.5 mm without any signal distortion resulting in a very robust installation.

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

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.

Eye-Safe Data Transmission of 1.25 Gbit/s Over 100-m SI-POF Using Green Laser Diode

We report on 1.25-Gbit/s transmission over 100-m step-index polymer optical fiber (SI-POF) with 6.5-dB margin. Nonreturn-to-zero modulation with offline decision feedback equalization technique has been applied to an intensity modulated direct-detection optical channel. An edge emitting direct injection laser diode with 515 nm is used, which allows us to improve the system power budget due to a lower attenuation of the POF at this wavelength. The fiber-coupled optical power has been adjusted to 0 dBm which corresponds to eye-safety requirements.

10.7-Gb/s Discrete Multitone Transmission Over 50-m SI-POF Based on WDM Technology

The capacity of the transmission link based on standard 1-mm core-diameter step-index plastic optical fiber (SI-POF) is strictly limited due to the strong attenuation and inter-modal dispersion. Parallel transmission of the data streams using several optical carriers might overcome the mentioned limits and allows for low-bandwidth transmitters and receivers. In this letter, we demonstrate the implementation of wavelength-division multiplexing technology with three laser diodes operating at 405, 515, and 650 nm with +7.1, +5.4, and +4 dBm fiber-coupled power. The 10.7-Gb/s data transmission based on the offline-processed discrete multitone modulation technique has been realized over 50-m SI-POF at the bit-error ratio of 10-3.

GaN Light-Emitting Diodes for up to 5.5-Gb/s Short-Reach Data Transmission Over SI-POF

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.

10.7-Gb/s Discrete Multitone Transmission Over 25-m Bend-Insensitive Multicore Polymer Optical Fiber

We report on 10.7-Gb/s transmission over 25-m multicore polymer optical fiber (MC-POF) which allows a robust transmission and ease of installation including tight bends. The discrete multitone modulation technique is applied to the intensity-modulated direct-detection optical channel in order to achieve high spectral efficiency. The use of bend-insensitive MC-POF reduces significantly the admissible bending radius to 2.5 mm without any signal distortion resulting in a very robust installation. The POF-optimized receiver comprises a silicon pin photodiode with an active diameter of 400 and a transimpedance amplifier.

Real-time Gigabit Ethernet bidirectional transmission over a single SI-POF up to 75 meters

In this paper we demonstrate 1Gb/s bidirectional transmission over a single SI-POF, over the record distance of 75m. We successfully tested our system running real time Gigabit Ethernet traffic generated by a router tester.

10Gbps POF ribbon transmission for optical interconnects

In this paper, we present a solution for optical interconnects with Polymer Optical Fibers, based on a parallel approach: a ribbon made or 4 fibers is used in conjunction with a VCSEL array and a photodiode array, for transmitting a total data rate of 10Gbps over a distance of 25m.

Channel capacity of step-index Polymer Optical Fibers: Experiments and simulation with realistic parameters

Step-index Polymer Optical Fibers (SI-POF) are candidates for broadband in-house networks. For the first time, we give a comprehensive overview over the real channel capacity of POF links up to 100 m, based on experimental investigations and complex system simulations. More than 2 Gbit/s can be transmitted at very low BER with existing components. Improved devices will give place for further progress.