Waveguide-based single-pixel up-conversion infrared spectrometer
Qiang Zhang, Carsten Langrock, M. M. Fejer, Yoshihisa Yamamoto
TL;DR
This paper presents a waveguide-based single-pixel infrared spectrometer that uses sum-frequency generation to convert IR signals to visible light, achieving significantly lower noise than commercial spectrometers.
Contribution
It introduces a novel PPLN waveguide-based up-conversion spectrometer with enhanced sensitivity and lower noise compared to existing solutions.
Findings
Noise equivalent power two orders of magnitude lower than commercial analyzers
Successful demonstration of IR to visible up-conversion using PPLN waveguide
Effective detection of IR signals with silicon single-photon detector
Abstract
A periodically poled lithium niobate (PPLN) waveguide-based single-pixel up-conversion infrared spectrometer was demonstrated. Sum-frequency generation between a 1.5 micrometer band scanning pump laser and a 1.3 micrometer band signal generated visible radiation which was detected by a silicon single-photon detector. The noise equivalent power of the upconversion spectrometer was two-orders-of-magnitude lower than that of a commercial optical spectrum analyzer.
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