Kenneth S Hahn

US Patent:

6650684, Nov 18, 2003

Filed:

Dec 1, 1995

Appl. No.:

08/566222

Inventors:

Michael R. T. Tan - Menlo Park CA
Kenneth H. Hahn - Cupertino CA
Long Yang - Union City CA
Shih-Yuan Wang - Palo Alto CA

Assignee:

Agilent Technologies, Inc. - Palo Alto CA

International Classification:

H01S 308

US Classification:

372 99, 372 43, 372 45, 372 50

Abstract:

A surface-emitting laser (âSELâ) having predictable filamentation initiation. The SEL includes a light generation layer and first and second mirror layers. The first and second mirror layers reflect light generated in the light generation region back toward the light generation region. Each of the mirrors reflects light such that it adds coherently to the light generated in the light generation region or to the light reflected from the other mirror. One of the mirrors includes a localized imperfection which causes light interacting therewith to be attenuated or shifted in phase relative to light that does not interact with the imperfection region. As a result, lasing filaments are preferentially initiated in the regions adjacent to the localized imperfection.

US Patent:

56595689, Aug 19, 1997

Filed:

May 23, 1995

Appl. No.:

8/447657

Inventors:

Shih-Yuan Wang - Palo Alto CA
Michael R. Tan - Menlo Park CA
Andreas Weber - Redwood City CA
Kenneth H. Hahn - Cupertino CA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

H01S 319

US Classification:

372 96

Abstract:

The present invention provides a low noise multimode VCSEL that can be used to transmit data reliably on multimode optical media at data rates up to and exceeding 1 gigabit per second with bit error rates less than 1. times. 10. sup. -9 errors/bit. In contrast to conventional multimode lasers where optimal mirror reflectivity is designed for maximum power output, in the present invention mirror reflectivity is increased to a point where the output power is less than half the maximum output power. Preferably, the reflectivity of the first and second mirror regions of the multimode laser is high, typically greater than 99. 5%.

US Patent:

20200193658, Jun 18, 2020

Filed:

Dec 18, 2018

Appl. No.:

16/224353

Inventors:

- San Jose CA, US
Kenneth Hahn - San Bruno CA, US
Joshua Sweetkind-Singer - San Jose CA, US

International Classification:

G06T 11/20
G06F 16/901
G06K 9/62

Abstract:

The present disclosure relates to systems, non-transitory computer-readable media, and methods for accurately, efficiently, and flexibly generating digital graphical representations reflecting multiple data series in-scale utilizing dynamic y-axes. In particular, in one or more embodiments, the disclosed systems generate a normalized graphical representation portraying multiple data series in a common scale with a dynamic y-axis that portrays individualized data values based on user selection of various data series. Specifically, the presently disclosed systems and methods can generate normalized values for each of the included data series, plot the normalized values along a normalized y-axis, and include a dynamic y-axis that reflects the initial values of any of the included data series.