Closed-Loop Microsphere Laser for Optoelectronic Oscillator

A prototype ring laser in which a transparent microsphere serves as an electromagnetic-mode selector has been constructed in a continuing effort to develop optoelectronic oscillators for generating light signals amplitude-modulated by microwave signals, all with low phase noise. Optoelectronic oscillators could be used as signal sources in fiber-optic and microwave communication systems and in radar systems.