Hiroyuki Yokoyama

Hi there! I'm excited to tell you about the talented inventor Hiroyuki Yokoyama from Miyagi, Japan. He has an impressive portfolio of 36 patents, and he continues to push the boundaries of innovation with his latest inventions.

One of Yokoyama's recent patents is for a semiconductor laser device and apparatus using non-linear optical effect. This invention tackles the generation of ultra-short pulse light. The semiconductor laser device includes a semiconductor laser unit that utilizes a relaxation oscillation mechanism to generate a first pulse and a following component, and a filter that removes unwanted signals in a wavelength bandwidth broadened by chirping. The filter is designed as a short pass filter, allowing the passage of short-wavelength components. Additionally, Yokoyama has also provided an apparatus that utilizes non-linear optical effects, making use of this semiconductor laser device.

Another notable invention by Yokoyama is a laser diode assembly. This assembly comprises a mode-locked laser diode device, a diffraction grating that forms an external resonator, and an imaging section positioned between the laser diode device and the diffraction grating. The imaging section captures an image of the light output end face of the laser diode device and projects it onto the diffraction grating. The diffraction grating then produces primary or more order diffracted light, while outputting 0-order diffracted light externally.

Throughout his career, Yokoyama has worked with esteemed organizations such as Tohoku University and Sony Corporation. He has collaborated with individuals like Tomoyuki Oki and Masaru Kuramoto, further enhancing his innovative pursuits.

Hiroyuki Yokoyama's dedication to innovation and his contribution to technology through his patents are truly commendable. His inventive mind and collaborations have undoubtedly left an indelible impact on the field.