Quantum Design OptiCool® Optical Cryostat

Wiring and Feedthroughs

Wiring and feedthrough options are available to get electrical and optical signals into and out of the OptiCool cryostat. Wiring options are permanently mounted in the cryostat, so are usually installed at the factory. The fiber feedthrough is easily installed or removed by the end user. Pick from the following options to meet your experimental needs:

• Standard Sample Wiring – Each sample wiring assembly contains eight twisted pairs for a total of 16 wires. Four 4-pin connectors are presented on the pod to make contact to your sample.
• 3-Axis Positioner Wiring – The positioner wiring assembly is designed to be compatible with attocube piezo positioner stacks. Each assembly has enough wires to run up to 3 different axes of motion with the RES position feedback. If position feedback is not required, the feedback wires can be repurposed to run an additional 3 axes of motion. Contact Quantum Design for more information.
• RF Coax Wiring – The RF coax wiring assembly contains four coaxial cables capable of carrying high frequency signals up to 20 GHz.
• Optical Fibre Feedthrough – Feed four or more optical fibres into the sample volume. Can also be used for other items such as gas tubes.

OptiCool Wiring and Feedthrough Options

Sample Positioning

Many optical applications require precise positioning of the sample to the optical path for focusing or examination of an area of interest. The ability to scan the sample is also required for 2D imaging of sample properties. To meet these needs the OptiCool cryostat can be configured with a piezo-based nanopositioning stack to move your sample in situ. The nanopositioner option comes with all the adapters needed to mount the nanopositioners onto a pod, specialized cryostat wiring, cabling that can connect to the piezo controller, and a thermal link specifically designed for use in the OptiCool. The nanopositioner stack can be mounted on the standard pod or on the large-volume pod depending on experimental needs.

Windows and Objectives

Optical experiments can require a variety of windows and microscope objectives. To address these needs Quantum Design offers window and objective configuration options, including a low working-distance top window option, vacuum objective mounting hardware, and a bottom access window. The low working-distance top window reduces the minimum working distance from 15 mm to about 3 mm between the top of the outer window and the underside of the inner shield window. The hardware allows you to directly mount a wide variety of objectives at close spacing using the included window clamp and standard off-the-shelf adaptor rings. This means you can make adjustments or swap out objectives while the sample remains cold. Quantum Design also offers a Zeiss 100x LD EC Epiplan-Neofluar, infinity-corrected objective mounted inside the cryostat. This objective offers a 0.75 NA and a working distance of 4 mm. A kit is also available to mount your own objectives in vacuum if desired. A bottom access window is available for the cryostat, allowing transmission measurements along the magnet axis, perpendicular to the surface of the optical table.