Company Filing History:

7 out of 3,345

At&t Bell Laboratories

patents

3 out of 9,364

Lucent Technologies Inc.

Years Active: 1990-2002

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12 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6411750 - Distortion analyzer (2002-06-25),

2. 6330375 - Distortion analyzer for compensation apparatus of first order polarization mode dispersion (PMD) (2001-12-11),

3. 5600738 - Polarization dispersion compensation for optical devices (1997-02-04),

4. 5495543 - Polarization-independent optical wavelength selective coupler (1996-02-27),

5. 5388170 - Electrooptic device structure and method for reducing thermal effects in (1995-02-07),

6. 5361270 - Apparatus and method employing polarization modulation to reduce effects (1994-11-01),

7. 5359678 - Apparatus and method employing fast polarization modulation to reduce (1994-10-25),

8. 5327511 - Apparatus and method employing fast polarization modulation to reduce (1994-07-05),

9. 5317439 - Automatic on-line monitoring and optimization of optical network (1994-05-31),

10. 5296956 - Performance monitoring and fault location for optical equipment, systems (1994-03-22),

11. 5212743 - Automatic polarization controller having broadband, reset-free operation (1993-05-18),

12. 4966431 - Integrated-optic endless polarization transformer (1990-10-30),

Title: Fred L. Heismann: Innovator in Optical Signal Processing

Introduction

Fred L. Heismann is a notable inventor based in Freehold, NJ (US), recognized for his contributions to optical signal processing. He holds a total of 12 patents, showcasing his innovative spirit and technical expertise in the field.

Latest Patents

Among his latest inventions is a distortion analyzer designed to generate a distortion signal based on an input signal. This distortion signal is created by adding a first signal that corresponds to the entire spectrum of the input signal to a second signal representing a low-frequency component. The process also involves subtracting a third signal that corresponds to a specific frequency band of the input signal. Additionally, Heismann developed a distortion analyzer for compensation apparatus of first-order polarization mode dispersion (PMD). This invention compensates for the effects of polarization mode dispersion that an optical signal experiences as it travels through an optical transmission fiber. The distortion analyzer continuously examines the output signal from a birefringent compensator and supplies a distortion signal to help reduce the impact of polarization mode dispersion.

Career Highlights

Fred L. Heismann has had a distinguished career, working with prominent companies such as AT&T Bell Laboratories and Lucent Technologies Inc. His work in these organizations has significantly advanced the field of optical communications.

Collaborations

Heismann has collaborated with notable colleagues, including Mohammad Taghi Fatehi and Steven K. Korotky, contributing to various projects and innovations in optical signal processing.

Conclusion

Fred L. Heismann's innovative work in the field of optical signal processing has led to significant advancements, particularly in the area of polarization mode dispersion compensation. His contributions continue to influence the industry and inspire future innovations.

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For the Inventor, By the Inventor

Fred L Heismann

Location History:

Company Filing History:

Years Active: 1990-2002