Hiroyoshi Lang

Title: Hiroyoshi Lang: Innovator in Nonlinear Optical Measurement

Introduction

Hiroyoshi Lang is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of nonlinear optics, particularly in the development of advanced measurement apparatuses. With a total of 2 patents, Lang's work has garnered attention for its innovative approaches to complex sensitivity measurement.

Latest Patents

Lang's latest patents include a "Time-resolved nonlinear complex sensitivity measuring apparatus." This device is designed to measure the temporal changes in the nonlinear complex susceptibility of optical materials when exposed to femtosecond light pulses. It utilizes a pair of polarized lights that are orthogonal to each other, formed by splitting a single light pulse into reference and probe lights. The apparatus incorporates a polarization converting mechanism to align the directions of polarization on the test specimen. Additionally, a phase difference sweep mechanism allows for the determination of nonlinear complex susceptibility from the interference light intensity.

Another notable patent is the "Optical frequency linear chirp variable unit." This apparatus employs a dielectric multilayer film mirror and does not require realignment of the optical axis when varying the chirp amount. It consists of a pair of parallel dielectric multilayer film mirrors with a movable mirror positioned between them. The movable mirror is inclined to reflect oblique incident light multiple times, allowing for precise control over the chirp amount by moving the mirror forwards and backwards.

Career Highlights

Throughout his career, Hiroyoshi Lang has worked with esteemed organizations such as the Japan Science and Technology Agency and the Japan Science and Technology Corporation. His experience in these institutions has contributed to his expertise in optical technologies and innovations.

Collaborations

Lang has collaborated with notable colleagues, including Kazuhiko Misawa and Isao Matsuda. These partnerships have further enriched his research and development efforts in the field of nonlinear optics.

Conclusion

Hiroyoshi Lang's contributions to nonlinear optical measurement are significant and impactful. His innovative patents reflect a deep understanding of complex optical phenomena and a commitment to advancing technology in this field.