New optical techniques for performing the RF control functions needed for such applications as short-pulse and phased-array radar transmitters are described and demonstrated. The techniques utilize optical signals to directly control the internal operation of a solid-state oscillator by the photoexcitation of carriers within the active region of the oscillator. Short RF pulse generation is achieved by making use of the subnanosecond optical power rise time of a laser diode to rapidly quench the RF output of a microwave oscillator. Phase control of a microwave oscillator is achieved by a phase-locked-loop (PLL) scheme wherein the loop is completed by an optical signal that directly controls the output frequency.
|Number of pages
|IEEE Transactions on Microwave Theory and Techniques
|Published - Apr 1980
ASJC Scopus subject areas
- Condensed Matter Physics
- Electrical and Electronic Engineering