Lia has built a widely tunable, very stable laser to study whispering gallery modes in levitated silica spheres. It is externally tunable, so the wavelength is computer controlled. To go along with is we knocked up a home built spectrometer with picometre resolution so that we know what we’re looking at!

Extended cavity diode laser with motorized actuator to tune the wavelength.

Extended cavity diode laser with motorized actuator to tune the wavelength.

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