Masaki Naritomi

Multi-Gb/s graded-index POF data link with butt-coupled single-mode InGaAs VCSEL

InGaAs quantum-well-based vertical-cavity surface-emitting lasers (VCSELs) at 935-nm emission wavelength are investigated for perfluorinated graded-index plastic-optical fiber (GI-POF) links. We report a 7-Gb/s pseudorandom bit sequence (PRBS) nonreturn-to-zero (NRZ) data transmission over 80-m-long 155-/spl mu/m-diameter GI-POF at a bit-error rate (BER) of better than 10/sup -11/.

Multigigabit/s perfluorinated graded-index plastic-optical-fiber data links with butt-coupled single-mode InGaAs VCSEL

Vertical-cavity surface-emitting lasers (VCSELs) with emission wavelengths in the range from 850 nm to 950 nm are highly attractive light sources for low-cost, high-speed data transmission over several hundred meters of perfluorinated graded-index plastic-optical fibers (GI- POFs). Multi-Gigabit/s data transmission over common PMA- based step-index POFs is generally limited to several meters predominantly due to dispersion. Here, we demonstrate 3 Gbit/s and 7 Gbit/s pseudo-random-bit-sequence non-return- to-zero data transmission over 80 m perfluorinated GI-POF made of CYTOP using a single mode butt-coupled selectively oxidized InGaAs VCSEL source emitting at 935 nm emission wavelength. For 3 Gbit/s data rather the received optical power for a bit error rate (BER) of 10-11 is -22.5 dBm for back-to-back (BTB). A power penalty of 1 dB is found for transmission over 100 m graded-index multimode glass fiber and 2 dB for 80 m GI-POF for 80 m GI- POF transmission. Reduced power penalty observed at 7 Gbit/s is attributed to the restricted modulation bandwidth of the VCSEL used in the experiment.

The First Low-Loss and High-Bandwidth 61-127 Channel Graded-Index Steric Cores Polymer Waveguide

We succeeded in fabricating a low-loss and high-bandwidth polymer optical waveguide with graded index type 61-127 cores. The propagation loss is 0.0004 dB/cm at 850 nm and bandwidth of each GI core is 3.2 GHz through 200 m waveguide.