Fig. 3: The generation of mid-IR WDM signals through the difference-frequency generation process in the periodically poled lithium niobate (PPLN) waveguide. | Nature Communications

Fig. 3: The generation of mid-IR WDM signals through the difference-frequency generation process in the periodically poled lithium niobate (PPLN) waveguide.

From: High-capacity free-space optical communications using wavelength- and mode-division-multiplexing in the mid-infrared region

Fig. 3

a Spectrum of the generated mid-IR WDM signals with a resolution of ~1 nm. Arrows indicate the three mid-IR WDM channels. b Generated mid-IR beam power as a function of the 1064 nm pump power with different signal power values. The C-band signal wavelength is set at 1550 nm. c Generated mid-IR beam power as a function of PPLN temperature with different C-band signal wavelengths. d Generated mid-IR beam power as a function of C-band signal wavelength with a PPLN temperature of 49.5 °C.

Back to article page