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.
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Acknowledgements
The authors gratefully acknowledge DST, New Delhi, for providing financial support to carry out this research work under PURSE II scheme. One of the authors, Mr. K. Murali Krishna is thankful to DST, New Delhi, for the award of DST-PURSE fellowship.
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Karunakaran, M.K., Muthu, G.M. (2018). Theoretical Investigations on the Thermal Effects of VCSEL and Its Impact on the Frequency Response of Multimode Fiber Optic Link. In: Saini, H., Singh, R., Reddy, K. (eds) Innovations in Electronics and Communication Engineering . Lecture Notes in Networks and Systems, vol 7. Springer, Singapore. https://doi.org/10.1007/978-981-10-3812-9_5
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