Stephen H. Chakmakjian
The Institute of Optics
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Publication
Featured researches published by Stephen H. Chakmakjian.
IEEE Journal of Quantum Electronics | 1995
Karl W. Koch; Eric C. Cheung; Gerald T. Moore; Stephen H. Chakmakjian; J. M. Liu
The parametric fluorescence from a nonlinear crystal driven by a pump beam of finite cross section displays a hot spot in the angular and spectral distribution of the signal radiation. The hot spot in the signal radiation occurs where the pump and idler Poynting vectors are collinear. Similarly, a hot spot in the idler radiation is predicted when the pump and signal Poynting vectors are collinear. Signal photons entering the signal hotspot are generally not correlated in direction or frequency with idler photons entering the idler hot spot. We report experimental observation of the signal hot spot in a AgGaS/sub 2/ crystal pumped by a Nd:YAG laser and describe a theory developed to understand the phenomenon. Qualitative and quantitative comparisons of the theory and data show good agreement. >
Journal of The Optical Society of America B-optical Physics | 1989
Stephen H. Chakmakjian; Karl W. Koch; Stephanos Papademetriou; C. R. Stroud
A theory is developed to describe the way in which modulations in the pump intensity produce modulations in the gain of a four-level, homogeneously broadened laser amplifier. The theory is tested by carrying out an experiment using an alexandrite crystal pumped by a cw dye laser. A second dye laser is used to measure the gain in the inverted laser transition. The dependence of the magnitude and the bandwidth of the gain on the pumping rate is determined. Agreement between theory and experiment is good.
Archive | 1994
Stephen H. Chakmakjian; Mark T. Gruneisen; Karl W. Koch; Gerald T. Moore
Journal of the Optical Society of America | 1988
Stephen H. Chakmakjian; Karl W. Koch; Carlos R. Stroud
Physical Review A | 1989
Stephen H. Chakmakjian; Stephanos Papademetriou; Karl W. Koch; C. R. Stroud
Journal of the Optical Society of America | 1992
Stephanos Papademetriou; Stephen H. Chakmakjian; Carlos R. Stroud
Physical Review A | 1989
Karl W. Koch; Stephen H. Chakmakjian; Stephanos Papademetriou; C. R. Stroud
Journal of the Optical Society of America | 1989
Karl W. Koch; Brian J. Oliver; Stephen H. Chakmakjian; Carlos R. Stroud; Lloyd W. Hillman
Archive | 1987
Karl M. Koch; Stephen H. Chakmakjian; Carlos R. Stroud; Lloyd W. Hillman
Archive | 1987
Stephen H. Chakmakjian; Karl M. Koch; Carlos R. Stroud; Lloyd W. Hillman