optical cryostat

cold breadboard integrated into optical table

obstruction-free work space & optical access

market leading low drift & vibration performance

enables sensitive long-term measurements

high quality vacuum system with turbo pump

keeps your samples clean

Quantum optics experiments often require cryogenic temperatures in combination with optical access to the sample space. Most experimental setups contain numerous optical elements that need to be precisely arranged on an optical table to shape and prepare the incident light, as well as to efficiently collect and convert the emitted light from the sample. The available space on the optical table in such cases is of paramount importance to many complex setups.

The revolutionary concept and design of the attoDRY800 optical cryostat present the perfect solution to satisfy these demanding requirements: it consists of an ultra low vibration cold breadboard platform which is fully integrated into an optical table. The cryocooler assembly is located in the otherwise unused space underneath. This unique design ensures a free workspace and unobstructed optical access to the cold sample from all directions on the optical table. Apochromatic objectives with high numerical aperture (NA=0.81-0.95) can either be integrated into the cryostat, into the vacuum shield, or put in close working distance next to the optical windows from the outside. This ensures extremely low drifts and optimal collection efficiency.

Being a closed-cycle cryostat, the attoDRY800 is the perfect replacement for all optical helium flow cryostat setups, adding the huge advantage that it requires no liquid cryogens and thus minimizing running costs. In addition, a fully automated temperature control between 3.8 and 320 K conveniently enables unattended long measurement cycles. Most other off-the-shelf closed-cycle cryostats suffer from severe vibrations at the sample location, which typically are in the range of many microns. Thanks to our patented vibration isolation technique, the residual vibrations on the cold plate of the attoDRY800 were measured to be around 2.6 nm peak-to-peak (vertical direction) only. Hence, with the attoDRY800 optical cryostat even extremely sensitive measurements are possible. Its cold breadboard sample space is designed to host several of attocube’s patented nanopositioners, as well as complete microscope or photonic probe station solutions.


White Paper

"Wide-field cryo-microscopy with the attoDRY800 optical cryostat"

read the full version


attoDRY800 Article

"Optical cryostat proves a game-changer in quantum communication studies"

read the Physics World article featuring the pioneering research of Dr. Tobias Heindel


Choose your favorite Shroud

Vacuum Shrouds

Anticipating typical configurations, we have designed several standard vacuum shrouds and cold shields for the attoDRY800/800xs optical cryostat, that are intended for certain types of positioners, sample holders, working distances and objectives. These options constitute an economic pre-configured set of components that give the user a head start for his research with optics at low and variable temperatures.

The vacuum shroud can have an almost arbitrary shape depending on the experimental needs of each user. We distinguish between standard configurations, which cover the most typical applications, and fully customized configurations.


For a detailed definition of used terms and descriptions please visit our Closed-Cycle Cryostats Glossary

General Specifications
technologylow vibration, closed-cycle cryostat intimately integrated into optical table (sold separately)
sample environmentcryogenic vacuum, sample cooled via braids (ATC100)
sample space75 mm (diameter)
sample exchangeeasy access via removal of vacuum shroud
usabilityfully automated temperature control (vacuum, cooldown, T control, warmup), all pumps integrated, USB interface for remote control
vibration & acoustic noise damping systemproprietary low vibration design
Performance Data
temperature range3.8 .. 320 K (depending on configuration)
Base pressure (in sample chamber)< 5e-6 mbar
leak rate of vacuum< 5e-9 mbar l/s
cool down time (incl. pumping time)< 4.5 h to 5 K (depending on thermal load)
temperature stability< 15 mK (peak-to-peak with damped sample mount)
cooling power at cold plate> 170 mW @ 5 K
vibration level (cold plate, vertical)< 5 nm (peak-to-peak@1500 Hz)
power consumptionmax. 3 kW
cooling of compressorwater cooling (default; requires local infrastructure)
Size and Dimensions
optical tablestandard size 900 mm x 1800 mm x 305 mm (leg height 597 mm), other table sizes available; metric or imperial mounting threads
Options and Upgrades
temperature controllerincluded
pumping kitincluded
vacuum shroudBasic (standard shroud); upgrade options: RT-SWD, RT-USWD, LT-APO objective, HV objective, Photonic Probe Station, or customized height, diameter, windows & working distance
electrical access36 customer wires included, heat sunk @ 4 K (additional wiring on request)
feedthroughselectrical (DC, HF), optical fibers, gas capillary (on request)
sample motionlow temperature positioners
cryostat compressor upgradeair-cooled (grey-room recommended)
flexlinesextension to 13 m or 20 m (instead of 6 m)
air-compressorfor active vibration isolation of table
confocal Raman microscopescryoRaman (on request)
Cryogenic Photonic Probe Stationconfocal microscope with 2 fiber probes for side excitation/detection
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Customer Feedback

Prof. R. A. Taylor

University of Oxford, Department of Physics, Oxford, Great Britain

I have to say we are very pleased with the attoDRY800 and have collected a good deal of data already.

Dr. M. Kroner

Institute for Quantum Electronics, ETH Zurich, Switzerland

The attoDRY800 setup is ideal for phase contrast microscopy as it allows free space optical access to the sample from both sides and makes it easily possible to investigate the transmitted light in momentum and real space excellent!

Dr. Heindel

TU Berlin, Institute of Solid State Physics, Berlin, Germany

Our group is working on quantum optics experiments exploiting deterministic quantum light sources based on semiconductor quantum dots. The two attoDRY800 systems will be used to probe the mututal two-photon interference of remote quantum emitter located in both cryostats. We are keen on the exciting experiments possible with these very stable cryostat systems.

Prof. Michael R. Vanner

Imperial College London, Quantum Measurment Lab, London, GB

The attoDRY800 meets our demanding science needs and we are very happy with the system. The installation went smoothly and we enjoyed the discussions and training session with the engineer. Since the installation, the system has operated without error and attocube have been very helpful with all of our follow up questions.