Figure 1
From: Spatially resolved fibre cavity ring down spectroscopy
Schematic of the spatially resolved FCRDS. TLS tuneable laser source, FC fibre coupler, PC polarization controller, FOC fibre optic circulator, PBS polarizing beam splitter, FUT fibre under test, PD photodetector, LD laser diode, ISO isolator, WDM wavelength division multiplexer.
