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27 April 2010 Ultra-sensitive NIR-spectrometer based on frequency up-conversion detector
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Abstract
We developed a spectrometer for signals at single photon levels in the near infrared (NIR) region based on a tunable up-conversion detector. This detector uses a 5-cm periodically poled lithium niobate (PPLN) waveguide to convert NIR photons to a shorter wavelength that are then detected by a silicon avalanche photodiode. The sensitivity of this spectrometer is -126 dBm, which is three orders-of-magnitude higher than any commercial optical spectrum analyzer in this wavelength range. Additionally, we use two PPLN waveguides to implement a polarization-independent up-conversion spectrometer, and use it to study a fiber-based quantum communication system.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Lijun Ma, Oliver Slattery, and Xiao Tang "Ultra-sensitive NIR-spectrometer based on frequency up-conversion detector", Proc. SPIE 7680, Next-Generation Spectroscopic Technologies III, 76800P (27 April 2010); https://doi.org/10.1117/12.847133
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