Edward Laskowski

US Patent:

55966616, Jan 21, 1997

Filed:

Dec 28, 1994

Appl. No.:

8/365618

Inventors:

Charles H. Henry - Skillman NJ
Edward J. Laskowski - Scotch Plains NJ
Yuan P. Li - Alpharetta GA
Cecilia Y. Mak - Bedminster NJ
Henry H. Yaffe - Dunwoody GA

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

C02B 628

US Classification:

385 24

Abstract:

In accordance with the invention, a new type of monolithic optical waveguide filter comprises a chain of optical couplers of different effective lengths linked by differential delays of different lengths. The transfer of the chain of couplers and delays is the sum of contributions from all possible optical paths, each contribution forming a term in a Fourier series whose sum forms the optical output. A desired frequency response is obtained by optimizing the lengths of the couplers and the delay paths so that the Fourier series best approximates the desired response. The filter is advantageously optimized so that it is insensitive to uncontrolled fabrication errors and is short in length. The wavelength dependence of practical waveguide properties is advantageously incorporated in the optimization. Consequently, the filter is highly manufacturable by mass production.

US Patent:

57199760, Feb 17, 1998

Filed:

Oct 24, 1995

Appl. No.:

8/547767

Inventors:

Charles Howard Henry - Skillman NJ
Edward John Laskowski - Scotch Plains NJ
Yuan P. Li - Duluth GA
Henry Howard Yaffe - Dunwoody GA

Assignee:

Lucent Technologies, Inc. - Murray Hill NJ

International Classification:

G02B 626

US Classification:

385 50

Abstract:

An optimized waveguide structure enables the functional integration of various passive optic components on a single substrate. The optimized waveguide structure is characterized by a thicker core layer than used for square core waveguides and a core width that changes according to different functional regions of the optic circuit within which it is incorporated. The height (H) of the waveguide core is determined by the thickness of the core layer defined during the fabrication process and is ideally uniform across the circuit. The width (W) of the core, however, is changed between functional regions by the photo-lithographic mask and the chemical etching during the fabrication process. By way of example, an optimized waveguide structure for a P-doped silica planar waveguide with a. DELTA. approximately 0.

US Patent:

56299990, May 13, 1997

Filed:

Mar 10, 1995

Appl. No.:

8/401545

Inventors:

Charles H. Henry - Skillman NJ
Edward J. Laskowski - Scotch Plains NJ
Yuan P. Li - Scotch Plains NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

G02B 626

US Classification:

385 43

Abstract:

The present invention relates to a waveguide taper. The waveguide taper has a first end and a second end for being coupled with a fiber. The core has an overall width that progressively increases from the waveguide end toward the fiber end such that the width of the fiber end of the taper corresponds to the diameter of the core of the fiber. Side-gaps are disposed in the sides of the core and extend into the core but not across the entire width of the core. The depth of the side-gaps progressively increases from the waveguide end to the fiber end of the taper. In one embodiment, the side-gaps may be aperiodically and/or randomly disposed along the length of the taper and the side-gaps can be disposed at different angles to a direction of light propagation along a length of the core.

US Patent:

58870970, Mar 23, 1999

Filed:

Jul 21, 1997

Appl. No.:

8/897274

Inventors:

Charles Howard Henry - Skillman NJ
Daryl Inniss - Alpharetta GA
Edward John Laskowski - Scotch Plains NJ
Michele Ann Milbrodt - Macungie PA

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

G02B 626

US Classification:

385 39

Abstract:

In accordance with the invention, arrays optical sources are combined in a multilevel planar optical waveguide structure for insertion into an optical fiber laser. The basic element of the combiner is a planar array of multiple waveguides which converge and are gradually tapered to a single output waveguide. A plurality of such elements integrally formed on successive cladding layers provides a high power stack of vertically aligned outputs. An arrangement is described for using such apparatus in the amplification of optical communications signals.

US Patent:

55009166, Mar 19, 1996

Filed:

Sep 9, 1994

Appl. No.:

8/303913

Inventors:

Raymond A. Cirelli - Hillsborough NJ
Charles H. Henry - Skillman NJ
Edward J. Laskowski - Scotch Plains NJ
Michele A. Milbrodt - Macungie PA
Henry H. Yaffe - Dunwoody GA

Assignee:

AT&T Corp. - Murray Hill NJ

International Classification:

G02B 634
H01L 2170

US Classification:

385 37

Abstract:

A waveguide Bragg reflector is made by forming periodic grooves in either the undercladding or the core, applying a high index coating on the grooved surface and selectively removing the coating from the horizontal surfaces while leaving the coating on the vertical surfaces. The waveguide is then completed.