Optical communications – Receiver
Reexamination Certificate
2005-09-13
2005-09-13
Sedighian, M. R. (Department: 2633)
Optical communications
Receiver
C398S151000, C398S186000, C380S229000, C380S256000, C380S263000
Reexamination Certificate
active
06944407
ABSTRACT:
In analyzing radiation from a communication link, single-photon counting can be used to advantage especially at low levels of radiation energy, e.g. in the detection of optical radiation. Preferred detection techniques include methods in which (i) received optical radiation is intensity-modulated in accordance with a preselected code, (ii) wherein it is the optical radiation which is intensity-modulated with the preselected code, and (iii) wherein the radiation modulated with a preselected code is received. For registration of the signals received by a sensing element of a single-photon detector, time of arrival is recorded, optionally in conjunction with registration of time intervals. Advantageously, in the interest of minimizing the number of pulses missed due to close temporal spacing of pulses, D-triggers can be included in counting circuitry.
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Gorfinkel Vera
Gouzman Mikhail
Luryi Serge
Baker & Botts LLP
Curs Nathan
Sedighian M. R.
The Research Foundation of State University of New York
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