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Showing papers on "Optical switch published in 1971"


Patent
15 Mar 1971
TL;DR: In this paper, a static switch circuit with a power sharing portion operable to dissipate power so the required dissipation is shared with the main power switch in the circuit, the power sharing circuit portion has an NPN transistor and a PNP transistor connected in a white circuit configuration that is provided with bias signals from the center tap of the primary winding of the transformer used in the oscillator of the driver circuit for the main switch.
Abstract: In a static switch circuit with a power sharing circuit portion operable to dissipate power so the required dissipation is shared with the main power switch in the circuit, the power sharing circuit portion has an NPN transistor and a PNP transistor connected in a white circuit configuration that is provided with bias signals from the center tap of the primary winding of the transformer used in the oscillator of the driver circuit for the main power switch.

43 citations


Journal ArticleDOI
TL;DR: In this article, a mathematical analysis of a gyrator using two mode converters in series is given and the schemes for an isolator, modulator, optical switch, and optical read-out devices are mentioned.
Abstract: Wave propagation in optical waveguides on substrates of magnetic, optically active, or birefringent material is analyzed. The conditions for TE \Leftrightarrow TM mode conversion are derived and computer calculations showing the characteristic of a quartz-substrate mode converter is obtained. A mathematical analysis of a gyrator using two mode converters in series is given and the schemes for an isolator, modulator, optical switch, and optical read-out devices are mentioned.

31 citations


Patent
Davies R1, Fox R1
13 Jul 1971
TL;DR: In this article, the authors proposed to place an electronic signal controlled switch in series with the mechanical switch and to provide a second mechanical switch for opening the signal path to the electronic signal control switch before the switch is opened.
Abstract: In order to prevent arcing upon opening a mechanical switch it is proposed to place an electronic signal controlled switch in series with the mechanical switch and to provide a second mechanical switch for opening the signal path to the electronic signal controlled switch before the mechanical switch is opened.

10 citations


Patent
Juan Ramon Maldonado1
04 Jun 1971
TL;DR: In this article, a polycrystalline electrooptic plate, such as a fine grain ferroelectric ceramic plane parallel plate, is subjected to a constant tensile stress along an axis of tension in the plane of the plate.
Abstract: A polycrystalline electrooptic plate, such as a fine grain ferroelectric ceramic plane parallel plate, is subjected to a constant (in time) and uniform (in space) tensile stress along an axis of tension in the plane of the plate. A pair of electrode layers on a major surface of the plate define a gap in the plate, the gap running along a direction at an oblique angle with respect to the axis of tension. Control voltage pulses are applied across these electrodes to produce electric fields in the plane of the plate across the gap, thereby producing a controllable birefringence in the plate with respect to optical radiation propagating normal to the plate in the gap. By locating this place between an optical polarizer and analyzer, an optical switch (''''light gate'''') can be formed with simple electrical access to the electrode layers.

8 citations


Journal ArticleDOI
TL;DR: In this paper, an in-line eight-stage digital light deflector is described, which is similar to a birefringence-compensated transverse modular, with a practical angular aperture of 10°.
Abstract: An in-line eight-stage digital light deflector is described. The polarization switch is similar to a birefringence-compensated transverse modular, which has a practical angular aperture of 10°. The birefringent elements are single prisms.

6 citations


Patent
Floyd L Steen1
02 Nov 1971
TL;DR: In this paper, a turn-on directing circuit is provided for a static switch, which includes an oscillator for producing a train of discrete control signals, control signal enabling means and logic circuit means.
Abstract: A turn-on directing circuit is provided for a static switch. The switch includes an oscillator for producing a train of discrete control signals, control signal enabling means and logic circuit means. When switch conduction is desired an ON signal is provided to the enabling means to enable said means to effect switch turn-on. The turn-on directing circuit includes a supervisory circuit which temporarily disables the enabling means if a control signal is in existence when the ON signal is given and for reenabling the enabling means in time to allow the first successive control signal following the ON signal to effect switch turn-on.

1 citations