Investigations of self-pumped phase conjugate laser beams and coherence length.
Sutton, George M.
Walters, Donald L.
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The phase conjugation process by a nonlinear, photorefractive crystal is not completely ideal and losses should be expected to occur after a beam is conjugated. This thesis research investigates possible changes in coherence length as a result of internal losses in barium titanate (BaTi03 ). Additionally, laser reflections from a corner cube reflector is also examined for changes in coherence length. Experimental findings are inconclusive because the conventional spectrometer used to measure coherence length did not possess the required resolution. It is recommended that an interferometer which can resolve the laser line width be utilized for future coherence length measurements, together with a means of blocking the conjugated beam from entering the laser cavity and destabilizing the oscillations within.
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