DocumentCode
967151
Title
An optoelectronic attenuator for the control of microwave circuits
Author
Saddow, Stephen E. ; Thedrez, Bruno J. ; Lee, Chi H.
Author_Institution
Army Res. Lab., Adelphi, MD, USA
Volume
3
Issue
10
fYear
1993
Firstpage
361
Lastpage
362
Abstract
An optoelectronic technique suitable for the control of microwave circuits has been demonstrated. using a coplanar waveguide-photoconductive switch (CPW-PCS), the RF impedance is varied by using a laser diode to create a conductive plasma in the switch gap. With a fiber pigtailed AlGaAs laser diode and a silicon CPW-PCS, 30 dB of RF attenuation was achieved with a laser peak power of 375 mW. Intensity saturation of the Si:CPW-PCS was also observed and characterized to improve the attenuator performance.<>
Keywords
attenuators; microwave circuits; optical switches; photoconducting devices; semiconductor switches; strip line components; 375 mW; AlGaAs; RF impedance; Si; conductive plasma; coplanar waveguide-photoconductive switch; fibre pigtailed LD; laser diode; microwave circuits; optoelectronic attenuator; switch gap; Attenuators; Coplanar waveguides; Diode lasers; Microwave circuits; Microwave theory and techniques; Optical control; Radio frequency; Switches; Switching circuits; Waveguide discontinuities;
fLanguage
English
Journal_Title
Microwave and Guided Wave Letters, IEEE
Publisher
ieee
ISSN
1051-8207
Type
jour
DOI
10.1109/75.242261
Filename
242261
Link To Document