Strong Bandwidth Enhancement of Zn-Diffusion Single-Mode 850 nm VCSEL Transmission over Graded-Index Single-Mode Fiber

Strong O-E bandwidth enhancement (26 to 31GHz) of single-mode 850nm Zn-diffusion VCSEL via 1km graded-index single-mode fiber transmission is demonstrated. Error-free 48Gbit/sec transmission is achieved under low bias current as 4 mA without using equalizers.