Title :
Optical control of a digital phase shifter
Author :
Jemison, W.D. ; Berceli, T. ; Paolella, A. ; Herczfeld, P.R. ; Kasemset, D. ; Jacomb-Hood, A.W.
Author_Institution :
Center for Microwave-Lightwave Eng., Philadelphia, PA, USA
Abstract :
A method for the optical control of digital phase shifters which significantly reduces the number of control lines required is described. The technique uses a simple cost-effective light-emitting diode (LED) source along with a MESFET detector and an A/D converter to generate the digital phase shifter command. The approach is independent of the phase shifter operating frequency and is compatible with monolithic microwave integrated circuit (MMIC) technology and parallel optical signal processing. Experimental results are presented for the optical control of a 6-b digital phase shifter. To provide 360 degrees of phase shift, 310 mu W of optical power are required.<>
Keywords :
MMIC; Schottky gate field effect transistors; analogue-digital conversion; integrated optoelectronics; light emitting diodes; phase shifters; 310 muW; 360 degree phase shift; 6 bit; A/D converter; LED source; MESFET detector; MMIC; digital phase shifter; optical control of digital phase shifters; parallel optical signal processing; Frequency; Light emitting diodes; MESFETs; MMICs; Microwave integrated circuits; Optical control; Optical signal processing; Phase detection; Phase shifters; Photonic integrated circuits;
Conference_Titel :
Microwave Symposium Digest, 1990., IEEE MTT-S International
Conference_Location :
Dallas, TX
DOI :
10.1109/MWSYM.1990.99563
