Use this URL to cite or link to this record in EThOS: https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326252
Title: Properties and applications of the photorefractive material Ce:KNSBN
Author: Ding, Meisong
ISNI:       0000 0001 3424 962X
Awarding Body: University of Abertay Dundee
Current Institution: Abertay University
Date of Award: 2000
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Abstract:
CeiKNSBN is a new photorefractive material in the KNSBN family, which has some advantages compared to other crystals. Based on two-wave mixing theory, different methods are used to investigate the photorefractvie properties of the Ce:KNSBN crystal. Most parameters of the CeiKNSBN crystal are in the same orders with those of Cu:KNSBN crystal. The diffraction efficiency from the CeiKNSBN crystal is affected by the applied electric field. The applied field increases the response rate of the grating formation and enhances the diffraction efficiency. There exists an optimum applied field and grating spacing related to the maximum diffraction efficiency, and the history of applied field influences the value of diffraction efficiency. Fanning loss and thermal effects should be considered in the diffraction theory for the CeiKNSBN crystal. The phase conjugate properties of the CeiKNSBN crystal are demonstrated in the four-wave mixing configuration and in the SPPC CAT conjugator. The experimental results agree with the analytical solution under some conditions. The He-Ne laser generates higher SPPC in the CeiKNSBN crystal than that by the argon-ion laser. The Doppler frequency detuning technique is first, to our knowledge, applied in the SPPC CAT configuration. The SPPC reflectivity is enhanced and the uniformity of the reflectivity is improved by this technique.
Supervisor: Cartwright, Colin ; Gillespie, Allan Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.326252  DOI: Not available
Keywords: Wave mixing theory; Doppler frequency detuning
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