Abstract: A system incorporating an electromagnetic radiating tube uses a plurality of sensors to assess the status of the system and integrates the data produced by these sensors in a way that enhances the effectiveness of the data versus analyzing the data separately. This method has uses in detecting and predicting failures in electromagnetic radiating devices such as microwave tubes, and may also be used for life-cycle monitoring of such devices.

Abstract: The present invention has applications in high-bandwidth communications systems and other applications that utilize modulated optical energy. In one aspect of the invention, a short cavity diode-pumped laser generates optical energy that may be modulated over a wide range of frequencies. In one embodiment, the short cavity diode-pumped laser may be modulated at rates up to 15 GHz. The short cavity diode-pumped laser may include a laser diode modulator and a laser coupled to the laser diode modulator having a cavity lifetime of less than about 100 picoseconds.