Author(s)

Qi Chen, Christi Madsen

Department of Electrical & Computer Engineering, Texas A & M University, College Station, TX, USA.

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.

Chalcogenide, Mid-Infrared, Four-Wave Mixing

Chen, Q. and Madsen, C. (2016) Electrical Signal-to-Noise Ratio Enhancement in Detection of Mid-IR Signals by Four-Wave Mixing in As2S3-on-LiNbO3 Waveguides. Optics and Photonics Journal, 6, 69-74. doi: 10.4236/opj.2016.65010.