David A Sadler

Title: The Innovations of David A. Sadler

Introduction

David A. Sadler is a notable inventor based in Holmdel, NJ (US), recognized for his contributions to optical transmission systems. With a total of 5 patents, Sadler has made significant advancements in the field of telecommunications, particularly in the area of Raman amplification.

Latest Patents

One of Sadler's latest patents focuses on transient control in optical transmission systems. This invention involves adjusting the operations of certain elements in response to changes in the total optical power level across multiple channels. For instance, when a fiber cut leads to a sudden drop in the number of channels, the power levels of optical pumps in a Raman amplifier are adjusted to mitigate transient gain errors in the remaining channels. This adjustment is tailored to each optical pump based on the detected power change and specific coefficients, addressing non-linear responses in the Raman amplifier.

Another significant patent by Sadler is a method and apparatus for controlling pump powers of broadband Raman amplifiers in optical transmission systems. This invention aims to minimize noise by determining optimal pump settings that reduce the peak-to-peak ripple of channel powers. The method formulates a linear programming optimization problem, which includes 'virtual' channels alongside actual channels, and employs conventional techniques like the simplex method to derive new pump power settings.

Career Highlights

David A. Sadler has built a distinguished career at Lucent Technologies Inc., where he has been instrumental in developing innovative solutions for optical transmission systems. His work has not only advanced the technology but has also contributed to the efficiency and reliability of telecommunications networks.

Collaborations

Throughout his career, Sadler has collaborated with esteemed colleagues such as Robert D. Feldman and Mahan Movassaghi. These partnerships have fostered a collaborative environment that has led to groundbreaking advancements in optical technologies.

Conclusion

David A. Sadler's contributions to the field of optical transmission systems exemplify the impact of innovation in telecommunications. His patents reflect a deep understanding of the complexities involved in optical systems and demonstrate his commitment to advancing technology.