Experimental study demonstrates error-free 50 Gb/s NRZ data transmission up to 90 °C using an 850 nm VCSEL transmitter, indicating high-temperature feasibility for optical interconnects.
We report on the properties of an 850 nm vertical cavity surface-emitting laser (VCSEL) transmitter running at 50 Gb/s with NRZ modulation from 30 °C to 90 °C. This is the highest transmitter operating temperature at 50 Gb/s for a VCSEL link of any wavelength. This achievement is made possible by a combination of a high speed VCSEL design and driver and receiver circuits that incorporate equalization. Without equalization, the highest temperature attained with bit error ratio <;1E-12 is 57 °C.
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Kuchta et al. (2014) studied this question.
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