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.
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
Tan, W.C., Chen, Q., Kim, J. and Madsen, C. (2011) A Hybrid As2S3 Mach-Zehnder Interferometer Prepared by Magnetron Sputtering and its Photodarkening Effect. IEEE Journal of Quantum Electronics, 48, 237-243.
Chen, Q., Wang, X. and Madsen, C. (2012) Phase-Matching and Parametric Conversion for the Mid-Infrared in As2S3 Waveguides. Optics and Photonics Journal, 2, 260-264. http://dx.doi.org/10.4236/opj.2012.24031
Moro, S., Peric, A., Alic, N., Stossel, B. and Radic, S. (2010) Phase Noise in Fiber-Optic Parametric Amplifiers and Converters and Its Impact on Sensing and Communication Systems. Optics Express, 18, 21449. http://dx.doi.org/10.1109/JLT.2003.822152