This inventor holds 3 USPTO granted patents. Top assignees: Fujitsu Corporation, Fujitsu Telecom Networks Limited. Active years: 2009-2014.
Company Filing History:
Years Active: 2009-2014
Title: Koshi Kitajima: Innovator in Optical Technologies
Introduction
Koshi Kitajima is a prominent inventor based in Kawasaki, Japan. He has made significant contributions to the field of optical technologies, holding a total of 3 patents. His work focuses on advancing optical packet switching systems and signal attenuation methods.
Latest Patents
Koshi Kitajima's latest patents include an optical packet switching system. This apparatus consists of an optical packet switching apparatus, an optical transmitting apparatus, and an optical packet receiving apparatus. The optical packet transmitting apparatus features a packet generator that creates a packet signal by adding routing information to a received client signal. Additionally, it includes a BIP adding unit for incorporating BIP into the generated packet signal and an electrical-to-optical converter for transforming the packet signal into an optical packet signal for transmission. The optical packet receiving apparatus is equipped with an electrical-to-optical converter that converts the received optical packet signal back into an electrical packet signal, along with a BIP comparison unit that detects errors in the packet signal based on the added BIP.
Another notable patent is related to an optical signal receiving apparatus and an optical signal attenuation controlling method. This invention includes a VOA maximum attenuation control circuit that features a first resistor, a second resistor, a PNP transistor, and a capacitor. The circuit ensures that when the power of the optical interface unit is switched from OFF to ON, the transistor supplies current to the VOA, achieving maximum attenuation. As the capacitor charges, the base potential of the transistor reaches +5 volts, resulting in zero current and enabling maximum attenuation control by an operational amplifier.
Career Highlights
Koshi Kitajima has worked with notable companies such as Fujitsu Corporation and Fujitsu Telecom Networks Limited. His experience in these organizations has allowed him to develop and refine his innovative ideas in optical technologies.
Collaborations
Koshi has collaborated with esteemed colleagues, including Wataru Kawasaki and Satoshi Fukutomi. Their joint efforts have contributed to advancements in the field and have fostered a collaborative environment for innovation.
Conclusion
Koshi Kitajima is a distinguished inventor whose work in optical technologies has led to significant advancements in the field. His patents reflect a commitment to innovation and excellence, making him a key figure in the industry.