Title :
A direct optical injection locked 8 GHz MMIC oscillator
Author :
Bangert, A. ; Ludwig, M.
Author_Institution :
Fraunhofer-Inst. for Appl. Solid State Phys., Freiburg, Germany
Abstract :
The optical injection locking behavior of a monolithic integrated heterostructure FET (HFET)-oscillator has been investigated. The monolithic integration is an important step towards the implementation of optically controlled oscillators in phased array antenna systems. The oscillator was designed to operate at 8 GHz. The gate and source terminals of the HFET were biased at 0 volt through coplanar lines, which also served as a feedback and resonator circuit. The active region of the device was illuminated by a pigtailed laser diode modulated at about 8 GHz so that the oscillator circuit could be optically injection-locked. The experimental results show the optical locking behavior of the oscillator. A direct comparison between optical and electrical injection locking is possible.<>
Keywords :
MMIC; field effect integrated circuits; integrated optoelectronics; microwave oscillators; phase control; MMIC oscillator; active region; coplanar lines; experimental results; monolithic integrated heterostructure FET; optical injection locking; optical locking behavior; optically controlled oscillators; optically injection-locked; phased array antenna systems; pigtailed laser diode; resonator circuit; HEMTs; Injection-locked oscillators; Integrated optics; MMICs; MODFETs; Optical control; Optical feedback; Optical modulation; Optical resonators; Phased arrays;
Conference_Titel :
Microwave Symposium Digest, 1991., IEEE MTT-S International
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-87942-591-1
DOI :
10.1109/MWSYM.1991.147046
