6 x 86 Gb/s WDM transmission over 2 km multimode fiber using center launching technique and multi-level modulation.

We experimentally demonstrate transmission of 6 x 86 Gb/s DQPSK signals over 2 km of OM2 grade multimode fiber. The successful transmission of 86 Gb/s per wavelength over multimode fiber is the highest speed per wavelength ever reported to our knowledge. The transmission performance over OM2 grade multimode fiber is also compared with OM3 grade multimode fiber and conventional single mode fiber.