Small Tactical Antenna Array and Electronic Control (STAEC) Unit

Not Available The proposed work will demonstrate the feasibility of frequency shifting high-power cw diode lasers to target wavelengths of 1.5 ¿m and 4 ¿m . This will be accomplished by using the recently developed cw Raman laser, which can frequency shift diode lasers to wavelengths ranging from 1 ¿m to longer than 4 ¿m. A team including the inventors of this technology will do this work. The first cw Raman laser was designed for low powers, operated with a photon conversion efficiency of 34%, and was accurately modeled by theory. An exciting prediction of this theory is that high power operation can be achieved with photon conversion efficiencies greater than 90%. Output beams will be single mode and powers of several Watts are expected using existing diode lasers as pumps. The cw Raman laser obtains high efficiencies by utilizing the multiple reflections that occur within a high-finesse cavity. This increases the effective interaction distance and also increases the pump intensity due to constructive interference of the multiply reflected pump beam. The primary benefit of this technology will be the ability to generate high-quality, high-power, cw laser beams in spectral regimes that are otherwise difficult to reach