Controlling polarization of an optical carrier of double sideband-suppressed carrier modulated lightwave for improving characteristics of a sub-terahertz continuous wave generated by photomixing

To improve characteristics of a sub‐terahertz (THz) continuous wave (CW) as controlling polarization of an optical carrier for increase of optical carrier suppression levels, an orthogonally polarized extra optical signal with the same wavelength of an optical carrier was added to the double sideban...

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Bibliographic Details
Published in:Microwave and optical technology letters 2011-03, Vol.53 (3), p.626-630
Main Authors: Kim, Sungil, Kang, Kwang-Yong
Format: Article
Language:English
Subjects:
Carriers
Continuous wave
controlling polarization
DSB-SC
Microwaves
Noise levels
On-line systems
photomixing
Polarization
Reproduction
sub-terahertz
Wavelengths
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Summary:To improve characteristics of a sub‐terahertz (THz) continuous wave (CW) as controlling polarization of an optical carrier for increase of optical carrier suppression levels, an orthogonally polarized extra optical signal with the same wavelength of an optical carrier was added to the double sideband‐suppressed carrier modulated lightwave (DSB‐SC).Compared with the traditional DSB‐SC, the phase noise and output power characteristics of the sub‐THz CW were improved about 3 dB (50%) at 10 KHz offset frequency and about 2 dB (37%) at 0.1 THz center frequency. Consequently, the controlling polarization technique of the optical carrier can be helpful to make the cost‐saving sub‐THz systems without high‐cost optical filters to increase the optical carrier suppression levels. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:626–630, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25795
ISSN:0895-2477
1098-2760
1098-2760
DOI:10.1002/mop.25795