Optically Controlled 24GHz Oscillator

Author

Saedi, R. ; Daryoush, A.S. ; Berceli, T.

Author_Institution

Millimeter Wave & Lightwave Engineering Lab., Center for Microwave-Lightwave Engineering, Dept. of E.C.E., Drexel University, Philadelphia, PA, 19104

Volume

1

fYear

1990

fDate

9-13 Sept. 1990

Firstpage

579

Lastpage

583

Abstract

In the detection of modulated light in fiberoptic links, PIN photodiodes play an important role. These devices are essentially junction devices. Under proper biasing conditions, the junction capacitance of these devices can be changed by light illumination. This paper reports the results of tuning and frequency modulation experiments with a 24.5GHz HEMT oscillator configured with a PIN photodiode as the tuning element. In addiion to microwave applications of the PIN photodiode, the optical perfomance of the PIN photodiode was also investigated. Experimental results supported the detection of a frequency reference at 8.230GHz and a pulsed modulated IF at 4.399 GHz. By this procedure, we were able to simultaneously synchronize the HEMT oscillator, amplify the IF, and mix the IF with HEMT oscillation frequency.

Keywords

Capacitance; Frequency; HEMTs; Microwave oscillators; Optical control; Optical fiber devices; Optical modulation; Optical tuning; PIN photodiodes; Pulse modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 1990. 20th European

Conference_Location

Budapest, Hungary

Type

conf

DOI

10.1109/EUMA.1990.336105

Filename

4136062