Lawrence J Haas

US Patent:

49899368, Feb 5, 1991

Filed:

Dec 21, 1989

Appl. No.:

7/454603

Inventors:

Richard J. Coyle - Lawrenceville NJ
Gary J. Grimes - Thornton CO
Lawrence J. Haas - Broomfield CO
Anthony J. Serafino - Cranbury NJ
George J. Shevchuk - Old Bridge NJ

Assignee:

AT&T Bell Laboratories - Murray Hill NJ

International Classification:

G02B 626
G02B 636

US Classification:

350 9615

Abstract:

An excimer laser fabricates either an optical coupler opening or an optical mode scrambler by ablatively removing the cladding from the optical core of an optical fiber bus without damaging the optical core. Either coupler housing or a mode scrambler housing is attached to the optical fiber bus where the coupler or mode scrambler is to be fabricated. The coupler housing is used to position the laser, secure and align a coupler fiber, and provide cavities for junction and cladding repair materials. The mode scrambler housing serves a similar purpose.

US Patent:

51669935, Nov 24, 1992

Filed:

Dec 7, 1990

Appl. No.:

7/624154

Inventors:

Lee L. Blyler - Basking Ridge NJ
Gary J. Grimes - Thornton CO
Lawrence J. Haas - Broomfield CO
Robert M. Lien - Chester NJ
Emiel Ysebaert - Louisville CO

Assignee:

AT&T Bell Laboratories - Murray Hill NJ

International Classification:

G02B 626

US Classification:

385 31

Abstract:

A molded polymeric resin-filled coupler comprising two low-refractive index plastic molded subassemblies. One subassembly has an optically finished mixing region, with a channel that has a V shaped lower portion. The mixing region subassembly is covered with a lid subassembly of the same material as the mixing region subassembly. During assembly, optical fibers are inserted into the mixing region subassembly which is then filled with a high index material to form a high-refractive index waveguide core region in the channel. The molded low-refractive index subassemblies provide a waveguide cladding around the high-refractive index waveguide core. Low cost is attained by utilizing optically finished metal molds to produce the subassemblies resulting in an optically finished mixing region and lid subassemblies without the need to polish each subassembly.

US Patent:

44569963, Jun 26, 1984

Filed:

Dec 2, 1981

Appl. No.:

6/326828

Inventors:

Lawrence J. Haas - Broomfield CO
Arthur W. Klibbe - Broomfield CO
Pedro I. Perez-Mendez - Westminster CO

Assignee:

Bell Telephone Laboratories, Incorporated - Murray Hill NJ

International Classification:

G06F 1100

US Classification:

371 37

Abstract:

In a data processing system, the subject error correcting circuit is connected in the bridging mode to the data bus which interconnects a processor and a memory for error detection. It is presumed that the memory words obtained from the memory are relatively error-free, and the subject circuit does not delay their transmission, but simply monitors the data. If an error in the data is detected, an error signal is generated on the next processor microcycle, the processor aborts its present operation and then fetches the corrected data from the error correction circuit. If the frequency of errors increases or if a permanent error is detected, the subject error correction circuit switches to an in-line mode where it functions much as prior art error correction circuits: delaying the transmission of each memory word until the error check is complete.

US Patent:

51355558, Aug 4, 1992

Filed:

Feb 15, 1991

Appl. No.:

7/657575

Inventors:

Richard J. Coyle - Lawrenceville NJ
Gary J. Grimes - Thornton CO
Lawrence J. Haas - Broomfield CO
Anthony J. Serafino - Cranbury NJ
George J. Shevchuk - Old Bridge NJ

Assignee:

AT&T Bell Laboratories - Murray Hill NJ

International Classification:

C03C 2500

US Classification:

65 12

Abstract:

A method for fabricating a high efficiency optical coupler by matching the emerging light exit pupil from a coupler opening to the acceptance shape of a couple optical fiber. An excimer laser forms the coupler opening in an optical fiber by removing cladding from the optical core surface. The coupler opening has an elliptical shape resulting in an emerging light exit cone, and that exit cone matches an acceptance cone of a circular coupler optical fiber.

US Patent:

53115708, May 10, 1994

Filed:

May 10, 1991

Appl. No.:

7/699084

Inventors:

Gary J. Grimes - Thornton CO
Lawrence J. Haas - Broomfield CO

Assignee:

AT&T Bell Laboratories - Murray Hill NJ

International Classification:

H04M 1100

US Classification:

379 57

Abstract:

A communications switching system such as a PBX, central office switch and the like, responds to an incoming call to a called party by signaling a paging device as well as some other communications device having communications capability different from that of the paging device. In the disclosed embodiment, which pertains to a private branch exchange (PBX), this other communications device is one which provides two-way voice communications. Advantageously, the paging device may also be provided with the capability of signalling the communications system that the called party will shortly answer the call via a communications device possessing two-way voice communications. Upon receipt of this pager-transmitted signal, the communications system, if desired, can be provided with the ability to provide an announcement to the calling party of the called party's intent to answer the call. Once the called party reaches any voice communications device connected to the system, the incoming call is redirected to that device upon the called party providing a predetermined identification to the communications system.

US Patent:

50264117, Jun 25, 1991

Filed:

Dec 21, 1989

Appl. No.:

7/454084

Inventors:

Richard J. Coyle - Lawrenceville NJ
Gary J. Grimes - Thornton CO
Lawrence J. Haas - Broomfield CO
Anthony J. Serafino - Cranbury NJ
George J. Shevchuk - Old Bridge NJ

Assignee:

AT&T Bell Laboratories - Murray Hill NJ

International Classification:

C03B 2320

US Classification:

65 421

Abstract:

A method for fabricating a high efficiency optical coupler by matching the emerging light exit pupil from a coupler opening to the acceptance shape of a coupler optical fiber. An excimer laser forms the coupler opening in an optical fiber by removing cladding from the optical core surface. The coupler opening has an elliptical shape resulting in an emerging light exit cone and that exit cone matches an acceptance cone of a circular coupler optical fiber.

US Patent:

54286638, Jun 27, 1995

Filed:

Sep 30, 1993

Appl. No.:

8/129795

Inventors:

Gary J. Grimes - Thornton CO
Lawrence J. Haas - Broomfield CO

Assignee:

AT&T Corp. - Murray Hill NJ

International Classification:

H04M 1100

US Classification:

379 57

Abstract:

A communications signal-transmitting device carried by a communications system user indicates the location of that user relative to other wired or wireless communications devices connected to a communications system. This location indication is utilized by the communications system to forward incoming voice and/or data communications for that user to the other communications device so that the user can receive such communications. As a result, the location of any potential system user is provided and call forwarding for that user is accomplished without the prior art problems associated with activation and deactivation. In the disclosed embodiments which pertain to the forwarding of voice communications in a PBX environment, the communications device is a pager which communicates with the wired or wireless telephone sets connected to the line side of the PBX to provide the PBX with the location of the system user relative to these telephone sets.

US Patent:

51305127, Jul 14, 1992

Filed:

Oct 30, 1990

Appl. No.:

7/605751

Inventors:

Richard J. Coyle - Lawrenceville NJ
Gary J. Grimes - Thornton CO
Lawrence J. Haas - Broomfield CO
Anthony J. Serafino - Cranbury NJ
George J. Shevchuk - Matawan NJ

International Classification:

B23K 2600

US Classification:

21912168

Abstract:

A method for fabricating optical components in the cladding of an optical fiber bus by the utilization of a laser. An excimer laser fabricates either an optical coupler opening or an optical mode scrambler by ablatively removing the cladding from the optical core of an optical fiber bus without damaging the optical core. Either coupler housing or a mode scrambler housing is attached to the optical fiber bus where the coupler or mode scrambler is to be fabricated. The coupler housing is used to position the laser, secure and align a coupler fiber, and provide cavities for junction and cladding repair materials. The mode scrambler housing serves a similar purpose.