Fig. 1: LED-pumped maser experimental setup and simulation of pump intensity profile. | Communications Engineering

Fig. 1: LED-pumped maser experimental setup and simulation of pump intensity profile.

From: LED-pumped room-temperature solid-state maser

Fig. 1

a InGaN LED-pumped maser experimental setup where the Ce:YAG luminescent crystal is used to effectively guide and concentrate the light into the PcPTP using a PMMA waveguide. A coupling loop connected to a coaxial cable, interfaces with the TE01δ mode of the SrTiO3 resonator in the copper cavity, serving as an output coupler to extract the maser signal for subsequent measurement. b LightTools ray-tracing simulation shows the intensity distribution of the input pump profile at the PcPTP crystal. The figure shows the symmetric pump profile intensity mapped in azimuth and elevation, with colour-coded levels indicating relative luminance. The labels 90 V and 90H correspond to 90 degrees vertically and horizontally from the central peak intensity.

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