Optischer Impulsgeber

摘要

A short optical pulse generator is provided with a semiconductor laser (1) which oscillates continuously at a single wavelength, a semiconductor electro-absorption type optical modulator (2) which performs the intensity modulation of the output light from the laser (1), and a sinusoidal voltage generator (5) and a DC voltage generator (3) for driving the electro-absorption type optical modulator (2). A DC voltage is applied to the electro-absorption type optical modulator (2) so that the output light from the laser (1) is sufficiently extinguished. By applying a sinusoidal voltage to the optical modulator (2), short optical pulses are generated. In another embodiment two modulators are connected in series and a time delay is introduced between their respective modulating signals.