Norbert Lichtenstein

Title: **Norbert Lichtenstein: Innovator in VCSEL Technology**

Introduction

Norbert Lichtenstein, an accomplished inventor based in Langnau am Albis, Switzerland, has made significant contributions to the field of Vertical-Cavity Surface-Emitting Lasers (VCSELs). With a total of ten patents to his name, Lichtenstein has worked tirelessly to advance the functionality and efficiency of these vital semiconductor devices.

Latest Patents

Among his latest innovations, Lichtenstein's patents include methods for tailoring high-power VCSEL arrays. This involves the modification of selected regions of individual VCSEL devices during fabrication to achieve an array output beam with specific characteristics such as uniform output power. Key physical features addressed in his patents include the width of the metal aperture, the width of the oxide aperture, and the geometry of the contact ring structure on the device's top. These modifications not only enhance device performance but also optimize numerical apertures, beam waist, and wall plug efficiency. Another significant patent focuses on the intentional misalignment of VCSEL array layouts with respect to the xy-plane of the device structure, aiming to reduce the impact of crystallographic defects on individual emitters while maintaining a row/column structure essential for creating one-dimensional arrays.

Career Highlights

Throughout his career, Norbert has collaborated with notable organizations such as II-VI Delaware, Inc. and II-VI Laser Enterprise GmbH. His work in these companies has positioned him at the forefront of VCSEL technology development, leading to numerous advancements that have influenced both research and commercial applications of laser technology.

Collaborations

Lichtenstein's innovative journey has been supported by collaborations with esteemed colleagues, including Lukas Mutter and Martin Krejci. These partnerships have facilitated the exchange of ideas and expertise, fostering an environment conducive to groundbreaking inventions.

Conclusion

Norbert Lichtenstein's contributions to the field of VCSEL technology exemplify the impact of innovative thinking in the realm of semiconductor devices. With an impressive portfolio of patents and a strong network of professional collaborations, he continues to push the boundaries of what is possible, shaping the future of laser technology for various applications.