Impact of the positive and negative optical response of field-effect transistors on the frequency of optically controlled microwave oscillators

Abstract

In this paper, we present an optically controlled microwave oscillator design based on a field-effect transistor. Positive and negative optical responses in the transistor were observed depending on the irradiation wavelength of the optical beam. We find that the positive optical response shifts down the fundamental frequency, while the negative optical response shifts it up. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 1558–1561, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21701