Frederick J O'Donnell

Title: Innovations of Frederick J O'Donnell

Introduction

Frederick J O'Donnell is a notable inventor based in Billerica, MA (US). He has made significant contributions to the field of electro-optical modulation and optoelectronic switching. With a total of two patents to his name, O'Donnell's work showcases his expertise and innovative spirit.

Latest Patents

O'Donnell's latest patents include a sub-octave bandpass optical remote antenna link modulator and method. This invention features an electro-optical modulation device that utilizes a first Mach-Zehnder interferometric modulator. The modulator is designed to intensity modulate an optical carrier signal in response to an information signal. Additionally, a second Mach-Zehnder interferometric modulator is connected in cascade with the first, enhancing the modulation process. This technology is particularly useful for applications involving bandwidths of less than one octave, such as remote antenna links.

Another significant patent is the high-speed optoelectronic switch. This device is formed from a semi-insulating substrate of indium phosphide, which is doped with a deep level impurity. The switch operates by illuminating a small gap in a microstrip transmission line with laser pulses, creating a conducting path that turns the switch 'on.' The invention includes a heat-treatment process that improves the switch's response time to approximately 50 picoseconds, making it highly efficient.

Career Highlights

Frederick J O'Donnell is affiliated with the Massachusetts Institute of Technology, where he continues to contribute to advancements in technology. His work has garnered attention for its innovative approaches to optical and electronic systems.

Collaborations

O'Donnell has collaborated with notable colleagues, including Frederick J Leonberger and Gary E Betts. These partnerships have further enriched his research and development efforts.

Conclusion

Frederick J O'Donnell's contributions to the fields of electro-optical modulation and optoelectronic switching highlight his innovative capabilities. His patents reflect a commitment to advancing technology and improving communication systems.