Optical: systems and elements – Optical modulator – Light wave temporal modulation
Patent
1991-11-21
1993-06-22
Arnold, Bruce Y.
Optical: systems and elements
Optical modulator
Light wave temporal modulation
359245, 359249, 359254, 359257, 359320, 372 10, 372 12, G02F 103, G02F 129, H01S 311, H01S 3115
Patent
active
052219887
ABSTRACT:
A device for damping the vibrations of an elongated, substantially rectangular crystal in response to an applied high voltage electrical field comprises a pair of dielectric panes which are impedance matched with the crystal and are attached to opposite sides thereof. As attached to the crystal, each of the panes is disposed at the periphery of the electrical field, and an aluminum block is attached to each of the panes on a surface which is opposite from the crystal. The mass of aluminum blocks, and the texture of their exposed outer surfaces cooperate to mechanically dampen the acoustic vibrations transmitted from the crystal through the panes. Additionally, the rectangular dimensions of the crystal are chosen to delay the propagation of acoustic waves from the surfaces of the crystal to its center. This is done in order to preserve an optical window through the crystal for a period of time during which this window, at the center of the crystal, experiences only the electro-optical effect caused by an applied electrical field and does not experience the "ringing" which is caused by acoustic waves.
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Arnold Bruce Y.
Intelligent Surgical Lasers
Lester Evelyn A.
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