Mid-infrared (mid-IR) signals can be converted to near-infrared (near-IR)
wavelengths in As2S3-on-LiNbO3 waveguides by
high efficiency four-wave mixing. It provided us a solution to detect mid-IR
signals indirectly by state-of-the-art near-IR detectors. High efficiency
four-wave mixing was demonstrated and electrical signal-to-noise ratio (eSNR)
improvement was also investigated. Compared to direct detection by PbSe and
HgCdTe (MCT) mid-IR detectors, the calculation indicated that, at room
temperature, the indirect detection to mid-IR signals increased the electrical
signal-to-noise ratio up to 67 dB.
References
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Huang, Y., Tien, E.K., Gao, S., Kalyoncu, S.K., Song, Q., Qian, F., Adas, E., Yildirim, D. and Boyraz, O. (2011) Electrical Signal-to-Noise Ratio Improvement in Indirect Detection of Mid-IR Signals by Wavelength Conversion in Silicon-on-Sapphire Waveguides. Applied Physics Letters, 99, 181122. http://dx.doi.org/10.1063/1.3651292
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IR Detectors Catalogue (Vigo System, Ozarow Mazowiecki, Poland, 2006).
