Use this URL to cite or link to this record in EThOS: https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.602240
Title: On some properties of optical maser radiation
Author: Lipsett, Morley Sherman
Awarding Body: Imperial College London
Current Institution: Imperial College London
Date of Award: 1963
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Abstract:
After a brief review of developments in the field of optical masers in general, certain properties of the ruby optical maser are discussed in more detail. An account is given of a number of original experiments leading to new observations on the temporal properties of ruby maser light. A photomixing experiment is described which resulted in an unambiguous measure of the coherence time of light beams from ruby when the output consisted, as is usual, of a random sequence of spikes. The experiment made use of light beams from two independent masers, and led to a measured upper limit to the coherence time of microsecond which corresponds to the width of an individual spike. Next, a new effect, namely the appearance of a quasi-continuous output under conditions of non-uniform energy distribution, is reported. The attendant mode behaviour is described in detail, and additional experiments are outlined which were designed to observe beats between modes associated with different regions in the crystal. For reasons given, beats were primarily observed between modes associated with the same region. The duration of the beats pointed to a much longer coherence time than in the case of the earlier experiment. This conclusion relies upon evidence from the earlier experiment, that the beat spectrum is not appreciably affected by phase coupling between modes. The results are summarized and suggestions are made for further experiments.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.602240  DOI: Not available
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