Company Filing History:
3 out of 7 
2 out of 1,430 
Years Active: 2003-2006
Title: Leif Fredin: Innovator in Optical Technologies
Introduction
Leif Fredin is a notable inventor based in Austin, TX (US), recognized for his contributions to optical technologies. With a total of 5 patents, he has made significant advancements in the field, particularly in methods and systems for measuring optical scattering characteristics.
Latest Patents
One of Fredin's latest patents is a method and system for measuring optical scattering characteristics. This innovative approach involves coupling a continuous wave laser excitation signal to an optical fiber. The system detects radiation backscattered by the optical fiber in response to the coupled excitation signal, producing a backscattered radiation signal. This signal is then mixed with the excitation signal to create a mixed signal, which is filtered to reduce the magnitude of frequencies other than conjugate mixing frequencies. The filtered signal is digitized, allowing for the calculation of the magnitude of backscattered radiation from a specific portion of the fiber. Additionally, the temperature of that specific portion can be determined from the magnitude of the backscattered radiation.
Another significant patent involves systems and devices for dynamic processing of optical signals. This optical system includes components such as an optical multiplexer, an optical demultiplexer, and an optical amplifier. The optical device within the system is configured to communicate with these components and features a substrate with a first waveguide array. A second waveguide array intersects the first at a predetermined angle, forming a junction where the index of refraction can be varied to implement desirable effects concerning optical signals transmitted through the waveguides.
Career Highlights
Throughout his career, Leif Fredin has worked with reputable companies, including Systems and Processes Engineering Corporation and Finisar Corporation. His experience in these organizations has contributed to his expertise in optical technologies and innovation.
Collaborations
Fredin has collaborated with notable individuals in the field, including Robert C. Chin and William H. Hallidy. These collaborations have likely enriched his work and contributed to the advancements in optical technologies.
Conclusion
Leif Fredin's contributions to optical technologies through his patents and collaborations highlight his role as an innovator in the field. His work continues to influence advancements in optical systems and methods.