70 dB optical carrier suppression by two-beam coupling in photorefractive media

Suppression of an optical carrier from an RF modulated laser beam of wavelength 532 nm is performed using two-beam coupling in photorefractive barium titanate. A theoretical analysis reveals that perfect suppression can be achieved at a specific modulation strength, which depends on the gain and int...

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Bibliographic Details
Published inApplied physics. B, Lasers and optics Vol. 72; no. 6; pp. 743 - 748
Main Authors Anderson, D.Z., Damiao, V., Popovic, D., Popovic, Z., Romisch, S., Sullivan, A.
Format Journal Article
LanguageEnglish
Published 01.05.2001
Subjects
Barium titanates
Beams (radiation)
Carriers
Gain
Joining
Modulation
Noise levels
Strength
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Summary:Suppression of an optical carrier from an RF modulated laser beam of wavelength 532 nm is performed using two-beam coupling in photorefractive barium titanate. A theoretical analysis reveals that perfect suppression can be achieved at a specific modulation strength, which depends on the gain and intensity ratio between the two beams. The experiments achieve a maximum of -72.9c2.4 dB carrier suppression at the theoretically ideal modulation strength, and -61.0c2.4 dB for small modulation strengths.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0946-2171
1432-0649
DOI:10.1007/s003400100570