Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1992-06-15
1993-12-14
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
385 2, H01J 4014
Patent
active
052705323
ABSTRACT:
The traveling-wave photodetector of the present invention combines an absorptive optical waveguide and an electrical transmission line, in which optical absorption in the waveguide results in a photocurrent at the electrodes of the electrical transmission line. The optical waveguide and electrical transmission line of the electrically distributed traveling-wave photodetector are designed to achieve matched velocities between the light in the optical waveguide and electrical signal generated on the transmission line. This velocity synchronization provides the traveling-wave photodetector with a large electrical bandwidth and a high quantum efficiency, because of the effective extended volume for optical absorption. The traveling-wave photodetector also provides large power dissipation, because of its large physical size.
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Taylor, H. F., et al., "Traveling Wave Photodetectors," Optoelectronic Signal Processing for Phased-Array Antennas II (1990) pp. 59-63.
Hietala Vincent M.
Vawter Gregory A.
Chafin James H.
Moser William R.
Nelms David C.
Ojanen Karuna
The United States of America as represented by the United States
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