TITLE:
Electrical Signal-to-Noise Ratio Enhancement in Detection of Mid-IR Signals by Four-Wave Mixing in As2S3-on-LiNbO3 Waveguides
AUTHORS:
Qi Chen, Christi Madsen
KEYWORDS:
Chalcogenide, Mid-Infrared, Four-Wave Mixing
JOURNAL NAME:
Optics and Photonics Journal,
Vol.6 No.5,
May
19,
2016
ABSTRACT: 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.