Abstract
We report on the implementation and characterisation of Auston switches based on semi-insulating CdTe, aimed at optically driving integrated optics modulators. In view of applications, switching of voltages around a few volts in sub-nanosecond or picosecond time scale is required, while minimizing optical energy. Most efficient operation is obtained at λ = 810 nm, using In : CdTe, where 6 V are switched by use of 2.5 nJ pulses in the nanosecond regime. Intrinsic sub-nanosecond response times are evident and from experimental results activating switching energies down to 50 pJ per pulse can be estimated for the device, when switching at 10 GHz, corresponding to 500 mW pulse peak power.
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