Abstract
The temperature dependence of Vertical Cavity Surface Emitting Laser (VCSEL)’s frequency response and its impact on a multimode fiber optic link is investigated for Radio-over-fiber applications. The frequency response of a 863 nm, bottom emitting VCSEL is evaluated in the temperature range of 20–120 °C. The multimode fiber link bandwidth is determined under different VCSEL temperatures and link lengths. The maximum 3-dB bandwidth is found to be 2.46 GHz for a length of 0.2 km at a bias current and operating temperature of 10 mA and 100 °C, respectively. However, the link bandwidth reduces to 0.37 GHz for a length of 1 km at 100 °C. This study helps to identify the optimum MMF length at different VCSEL temperatures.
Published Version
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