This inventor holds 3 USPTO granted patents and 1 published patent application and 3 EPO patents. Top assignees: Modulight Oy, Nokia Corporation, Reflekron Ltd.. Active years: 2007-2012.
Company Filing History:
1 out of 4 
1 out of 8,283 
1 out of 1 Years Active: 2007-2012
Title: Mircea Guina: Innovator in Semiconductor Technology
Introduction
Mircea Guina is a prominent inventor based in Tampere, Finland. He has made significant contributions to the field of semiconductor technology, holding a total of 3 patents. His work focuses on enhancing the performance and efficiency of semiconductor devices.
Latest Patents
One of his latest patents is the "Semiconductor saturable absorber reflector and method to fabricate thereof." This invention presents a design for a semiconductor saturable absorber that provides a reliable method to control and decrease the recovery time of absorption. The absorption recovery time is managed during the epitaxial growth by utilizing lattice-mismatched layers to induce dislocations and non-radiative recombination centers within the nonlinear absorbing region. These lattice reformation layers are strategically placed between the distributed Bragg reflector and the nonlinear absorption region, which may contain quantum-wells, quantum-dots, or bulk semiconductor material. The thickness and composition of these layers are crucial for controlling the amount of non-radiative recombination centers that trap optically excited carriers generated in the absorption region.
Another notable patent is the "Method for organizing a mode-locked pulse train by pump modulation." This method aims to stabilize the repetition rate in a passive harmonic mode-locked fiber laser that employs semiconductor saturable absorbers. The organization of the pulse train is achieved by electrically modulating the amplifier pump source, which in turn optically modulates the saturable loss of the semiconductor absorber. This efficient modulation mechanism of the cavity loss allows for the generation of an actively mode-locked pulse train.
Career Highlights
Throughout his career, Mircea Guina has worked with notable companies such as Nokia Corporation and Reflekron Ltd. His experience in these organizations has contributed to his expertise in semiconductor technology and innovation.
Collaborations
Mircea has collaborated with esteemed colleagues, including Oleg Okhotnikov and Anatoly Borisovich Grudinin. These partnerships have further enriched his research and development efforts in the field.
Conclusion
Mircea Guina's innovative work in semiconductor technology has led to significant advancements in the field. His patents reflect a deep understanding of the complexities involved in semiconductor devices, showcasing his commitment to innovation and excellence.