Bartley C Johnson

Title: Bartley C Johnson: Innovator in VCSEL Technology

Introduction: Bartley C Johnson, based in North Andover, MA, is a notable inventor with a remarkable portfolio of 33 patents. His innovative contributions primarily focus on vertical cavity surface emitting laser (VCSEL) technologies, which have substantial implications in various fields, including telecommunications and sensing applications.

Latest Patents: Johnson's recent patents showcase his ingenuity in refining VCSEL technology. One of his notable inventions is the "Tunable VCSEL with combined gain and DBR mirror," which optimizes the laser cavity by integrating the gain section with a distributed Bragg reflector (DBR). This innovative design effectively reduces the overall cavity length by incorporating gain structures within the DBR, demonstrating its efficiency particularly in the AlGaAs/GaAs material system utilizing strained InGaAs quantum wells as the gain medium. Another key invention is the "Optically pumped tunable VCSEL employing geometric isolation." This patent describes a VCSEL module that remains geometrically isolated from its pump, addressing noise issues through several strategies, including Faraday isolation. His work on single frequency pump lasers further contributes to minimizing wavelength jitter and amplitude noise, enhancing the reliability of laser systems.

Career Highlights: Bartley Johnson has built a reputable career with significant contributions to the field of optics and lasers. He has worked with esteemed companies such as Axsun Technologies and Excelitas Technologies, where he has played a crucial role in developing advanced laser technologies. His extensive experience in the industry underscores his commitment to innovation and the advancement of laser applications.

Collaborations: Throughout his career, Johnson has collaborated with other prominent figures in the industry, including Dale C Flanders and Mark E Kuznetsov. These partnerships have led to synergistic advancements in laser technology, further reinforcing his status as a leading inventor in this area.

Conclusion: Bartley C Johnson stands out as a pioneering inventor whose work in VCSEL technology has paved the way for numerous advancements in the field. With a solid portfolio of patents and collaborations with notable industry professionals, his contributions continue to influence the way laser systems are developed and utilized across various applications.