Abstract
For developing the applications of integrated optics to microwave and millimeter wave systems, a key point is the very high speed modulation of the lightwave. As external modulations seem to constitute the best solution, they need the availability of specific driving devices. The main requirements of these devices are given, in terms of speed (current gain cut-off frequency), current density, and breakdown voltage. The principle and capabilities of various kinds of field effects transistors available are summarized, with a large insistance on those that present the greatest potential such as the High Electron Mobility Transistors (HEMT) on InP substrate. Finally, the recent improvement of performance (speed, current density, breakdown voltage) are presented and discussed. It appears that the requirement on breakdown voltage remains the most difficult to satisfy for very high speed devices such as HEMT on InP but recent results lets hope the availability of satisfying devices in near future.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.