© The Institution of Electrical Engineers
For the first time, optical phase control of a hybrid heterojunction bipolar transistor (HBT) oscillator has been achieved. The results strongly indicate that the HBT is a suitable device for optically controlled oscillators. At a frequency of oscillation of 500MHz a locking range of more than 15 MHz was measured (δf/f⋍3%). The optical tuning range of the oscillator exceed 25 MHz.
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