1
Adolf J Giger: Transmitter power control circuit. AT&T Bell Laboratories, Sylvan Sherman, Erwin W Pfeifle, January 22, 1985: US04495648 (113 worldwide citation)

In a radio communication system, an adaptive transmitter power control system is described wherein the signal level at each receiver is monitored and a control signal, which is a function of the signal level, is transmitted back to the transmitting station to adjust the transmitter output power, as ...


2
William M Hubbard: Secure optical communication components, method, and system. Bell Telephone Laboratories Incorporated, Sylvan Sherman, Daniel D Dubosky, August 12, 1980: US04217488 (59 worldwide citation)

A transmitter of information to be communicated in secure form is optically coupled to a composite optical fiber at one end, the fiber being connected to a receiver of the secure information at the other end. The composite optical fiber has cores including a central core for carrying the secure info ...


3
Richard C Mondello: Submarine cable for optical communications. Bell Telephone Laboratories Incorporated, Burton I Levine, Stephen M Gurey, Sylvan Sherman, May 22, 1979: US04156104 (59 worldwide citation)

A repeatered submarine cable has a composite inner conductor for accommodating a system of optical fibers therein. The cable strength members include a central elongated filament and plural layers of stranded steel wires separated from the central filament by an annular insulating core member, in wh ...


4
Peter Klaus Runge: Method of fabricating optical fiber connectors. Bell Telephone Laboratories Incorporated, Wilford L Wisner, Daniel D Dubosky, Sylvan Sherman, August 15, 1978: US04107242 (56 worldwide citation)

A method of fabricating an optical fiber connector is disclosed using a transfer molding process employing a precision die whose interior surface defines a frustum for forming the mating surface of the connector. The fiber is inserted through the mold cavity and extends through an aperture in the en ...


5
Ivan P Kaminow, Vellayan Ramaswamy: Single polarization optical fibers and methods of fabrication. Bell Telephone Laboratories Incorporated, Sylvan Sherman, December 18, 1979: US04179189 (50 worldwide citation)

Orthogonally polarized waves are more effectively decoupled in a waveguide that is fabricated in a manner so as to deliberately enhance stress-induced birefringence. This characteristic is accomplished by introducing a geometrical and material asymmetry in the preform from which the optical fiber is ...


6
Stewart E Miller: Active optical fiber tap. AT&T Bell Laboratories, Sylvan Sherman, Eugen E Pacher, October 29, 1985: US04549782 (46 worldwide citation)

An active tap for use in an optical multiple access network is disclosed. The tap comprises a semiconductor substrate on which the electronics associated with an active parallel path are fully integrated. These include optical detectors, amplifiers and light emitters formed using standard semiconduc ...


7
Peter K Runge: Optical fiber connector. AT&T Bell Laboratories, Sylvan Sherman, David R Padnes, April 23, 1985: US04512630 (43 worldwide citation)

In a disconnectable low-loss optical connection for optical fibers, each fiber in a pair of optical fibers is surrounded by a connector body to the conical frustum mating end of which is applied a tiny, transparent, flexible index matching dome of silicone rubber or equivalent material. The connecto ...


8
Edwin Leroy Chinnock, Detlef Christoph Gloge, Peter William Smith: Method for breaking brittle rods or fibers. Bell Telephone Laboratories Incorporated, Sylvan Sherman, Thomas C O Konski, Wilford L Wisner, January 27, 1976: US03934773 (43 worldwide citation)

A method of breaking a rod of brittle material, such as a glass optical fiber, so as to yield a mirrorlike surface across the entire rod end is described. This is achieved by establishing a decreasing tensile stress across the cross section of the rod which, at all points, is greater than zero but l ...


9
George Ludwig Heiter, Hotze Miedema, Edwin Charles Moore: Distortion generator. Bell Telephone Laboratories Incorporated, Sylvan Sherman, October 24, 1978: US04122399 (36 worldwide citation)

The problems of high cost, high loss and incomplete distortion compensation are resolved in a distortion generating circuit which employs a nonlinear phase modulator (70, FIG. 7) and a linear phase shifter (71) as a means of generating selected distortion signal components. The circuit includes an o ...


10
Paul E Fleischer, Kenneth R Laker: Generalized switched-capacitor active filter. Bell Telephone Laboratories Incorporated, Sylvan Sherman, Volker R Ulbrich, February 9, 1982: US04315227 (31 worldwide citation)

Because of the very large variety of useful filter configurations, it is highly desirable to have a generalized circuit topology from which all specific filters can be derived. A generalized switched-capacitor biquadratic active filter comprises a pair of operational amplifiers (10, 11), each of whi ...