Transmission of 40 Gb/s Over 55 m Multimode Fiber using 12 GHz Bandwidth System Based on Vertical-Cavity Surface-Emitting Laser

Error free transmission (E-12) over 55 m long standard MMF at 40 Gb/s data rate is demonstrated with moderate signal conditioning on the VCSEL. The VCSEL has a −3 dBe bandwidth of 15 GHz resulting in system bandwidth of 12GHz, giving 3.3 bit/s/Hz coding efficiency.