title: Optical microscope and tapered fiber coupling apparatus for a dilution refrigerator.
abstract: We have developed a system for tapered fiber measurements of optomechanical resonators inside a dilution refrigerator, which is compatible with both on- and off-chip devices. Our apparatus features full three-dimensional control of the taper-resonator coupling conditions enabling critical coupling, with an overall fiber transmission efficiency of up to 70%. Notably, our design incorporates an optical microscope system consisting of a coherent bundle of 37,000 optical fibers for real-time imaging of the experiment at a resolution of ∼1 μm. We present cryogenic optical and optomechanical measurements of resonators coupled to tapered fibers at temperatures as low as 9 mK.
authors: Department of Physics, University of Alberta, Edmonton, Alberta T6G 2G7, Canada.
authors: A J R
authors: AJ
authors: MacDonald
authors: Department of Physics, University of Alberta, Edmonton, Alberta T6G 2G7, Canada.
authors: G G
authors: GG
authors: Popowich
authors: Department of Physics, University of Alberta, Edmonton, Alberta T6G 2G7, Canada.
authors: B D
authors: BD
authors: Hauer
authors: Department of Physics, University of Alberta, Edmonton, Alberta T6G 2G7, Canada.
authors: P H
authors: PH
authors: Kim
authors: Department of Physics, University of Alberta, Edmonton, Alberta T6G 2G7, Canada.
authors: A
authors: A
authors: Fredrick
authors: Department of Physics, University of Alberta, Edmonton, Alberta T6G 2G7, Canada.
authors: X
authors: X
authors: Rojas
authors: Department of Physics, University of Alberta, Edmonton, Alberta T6G 2G7, Canada.
authors: P
authors: P
authors: Doolin
authors: Department of Physics, University of Alberta, Edmonton, Alberta T6G 2G7, Canada.
authors: J P
authors: JP
authors: Davis