Wah L Lim

Title: Innovations of Wah L Lim

Introduction

Wah L Lim is a notable inventor based in Anaheim, California, recognized for his contributions to the field of laser technology. He holds a total of eight patents, showcasing his innovative spirit and technical expertise. His work primarily focuses on advancements in laser gyroscopes and related technologies.

Latest Patents

Among his latest patents is the "Ring laser gyro and magnetic mirror therefor." This invention describes a laser gyroscope designed as a sealed, unitary assembly of mirrors that are optically contacted to a monolithic gyro block. Notably, it does not utilize Brewster windows to isolate the laser plasma from the mirrors. The mirrors are constructed with hard multilayer dielectric films that can endure plasma exposure. Additionally, the invention features a magnetic mirror that employs the transverse Kerr effect to separate the frequencies of counter-propagating beams, thus avoiding lock-in. This magnetic mirror includes a Ni-Fe alloy layer with a thin iron or iron alloy layer deposited on top, creating a rotationally switchable Kerr effect combination. The magnetic field for switching is generated by an electric current developed in two pairs of orthogonally disposed wires embedded in the substrate beneath the iron and Ni-Fe alloy layers. Furthermore, a specially designed multilayer dielectric stack is placed on one of the mirrors to suppress S mode oscillation, limiting the gyro to P mode operation. Another significant patent is the "Laser gyro system," which presents an improved method and apparatus for reducing lock-in error in ring laser angular rate sensors. This system employs two independent feedback control systems to adjust the laser path of a ring laser angular rate sensor, achieving a minimum lock-in rate.

Career Highlights

Wah L Lim has had a distinguished career, working with prominent companies such as Honeywell GmbH and Northrop Corporation. His experience in these organizations has contributed to his development as an inventor and innovator in the field of laser technology.

Collaborations

Throughout his career, Wah L Lim has collaborated with notable individuals, including Harry A Gustafson and Francis H Zeman. These collaborations have likely enriched his work and led to further advancements in his inventions.

Conclusion

Wah L Lim's contributions to laser technology and his innovative patents reflect his significant impact in the field. His work continues to influence advancements in gyroscopic systems and laser applications.