Showing papers on "Optical switch published in 1969"

Remote functional control circuit

Abstract: We disclose a receiver of the type having an audiocircuit portion, a functional control circuit comprising a relay switch, a tone signal circuit having semiconductor switching means sensitive to presence of a certain tone signal, and additional series-connected semiconductor switch devices connected to the audiocircuit portion and to the first mentioned switching means, the presence of the certain tone signal causing the relay switch to be deactivated while enabling the audio circuit portion to function normally, but momentary interruption of the certain tone signal causing the relay switch to be activated and the audiocircuit portion to be concurrently squelched. Optionally operable switch means, connected in parallel with one of the additional series-connected semiconductor switch devices, is effective in its closed position to cause activation of the relay switch coterminously with continuance of the tone signal.

Generation of a variable-width subnanosecond optical pulse

Abstract: A novel technique for generating a single optical pulse using an electrooptic switch is demonstrated. The optical pulsewidth is unrelated to the width of the voltage pulse applied to the electro-optic switch. Pulsewidths continuously variable from 0.5 ns to 50 ns were obtained.