Selected Applications
Premium Line - optical measurements
Dissipation in Optomechanical Resonators
The acoustic dissipation of microresonators was analyzed via a cryogenic
interferometry setup. Hereby, a continuous flow 4He cryostat was utilized
as sample chamber, which in turn was equipped with a stack of attocube’s
ANPxyz51 positioners for the alignment of the sample with respect to an
optical fiber. The fiber was part of a homodyne interferometer, allowing
high signal-to-noise measurements of the eigenmodes of the resonator
while keeping disturbances due to radiation pressure and optical fluctu-
ations at a minimum. The turbo-pumped cryostat enabled interrogation
from room temperature to 20 K, and from atmospheric pressure to vacuum
levels of 2.5×10-7 millibar.
G. D. Cole, et al., 23rd IEEE International Conference on Microelectromechanical Systems, Hong Kong
SAR, China, 24–28 January 2010, TP133.
Realization of Optomechanically induced Non-Reciprocity
Non-reciprocal photonic devices, like circulators and isolators, have attracted
the attention of researchers in the field of quantum information. Recently, Prof
Chunhua Dong from University of Science and Technology of China successfully
demonstrated unambiguously non-reciprocity in an optomechanical system. The
optomechanical system (schematic shown in the figure) includes a whispering
gallery microresonator and a tapered fiber. The driving field can be clockwise
or counter-clockwise. The breaking of the time reversal symmetry leads to the
non-reciprocal transmittance of the signal light.
To carry out the non-reciprocal optical experiment, a set of attocube ECS and
ANP positioners are used for approaching the microsphere with the fiber. The
distance of the fiber to sphere can be finely adjusted for better optical signal
detection.
Z. Shen, G.C. Guo and C.H. Dong et al., Nature Photonics, 10, 657-661, 2016.
attoMOTION
Piezo-based Nano Drives
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