Harold P Hjalmarson

Title: **Harold P. Hjalmarson: A Pioneer in Photonic Innovations**

Introduction

Harold P. Hjalmarson is a notable inventor based in Albuquerque, NM, USA. He has made significant contributions to the field of photonics, holding a total of three patents that showcase his innovative capabilities. His work focuses primarily on advancements in circuit breakers and light sources, reflecting a deep understanding of semiconductor technology and its applications.

Latest Patents

Hjalmarson's latest patents include groundbreaking technologies that have the potential to transform existing systems. One of his notable patents is for an **optically switched circuit breaker with cascaded transistor topology**. This innovation entails a switching apparatus that includes a transistor switch circuit connected between a power input terminal and a load terminal, along with a switchable bypass leg that is optically controlled by a photoconductive semiconductor switch (PCSS). The design features a cascade of three or more series-connected transistors, enhancing the reliability and functionality of the circuit breaker in detecting fault conditions and managing electric current accordingly.

Another remarkable invention is his development of **light sources based on semiconductor current filaments**. This invention introduces a new type of semiconductor light source capable of producing high peak power output without relying on conventional methods such as injection, e-beam, or optical pumping. The light source is based on an electron-hole plasma formed within a current filament, allowing for significant advancements in coherent or incoherent optical emission. Its potential applications stretch across high-energy, short-pulse lasers and various other light sources.

Career Highlights

Throughout his career, Hjalmarson has worked with prestigious organizations, including Sandia Corporation and National Technology & Engineering Solutions of Sandia, LLC. His experience in these research and development environments has provided him with a platform to explore and refine his innovative ideas.

Collaborations

Collaboration plays a crucial role in Hjalmarson's work. He has partnered with esteemed colleagues such as Albert G. Baca and Guillermo M. Loubriel, contributing to the dynamic exchange of knowledge and expertise that drives innovation in technology. These collaborations have been instrumental in enhancing the development of his inventive solutions.

Conclusion

Harold P. Hjalmarson's contributions to the fields of semiconductor technology and photonics are invaluable. With three patents to his name, his work is paving the way for new technologies that have the potential to improve electrical systems and light sources. His innovative spirit and collaborative efforts continue to inspire advancements in the industry, making him a standout inventor in the realm of modern technology.