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Optical Fibers

Measurement Infrastructure

Bluefors systems can accommodate various optical fibers from Room Temperature to the Mixing Chamber Flange.

Overview
Product Highlights
Technical Specifications
Optical Fiber Installation Set
Technical Requirements
Contact Sales

We offer a solution to install Optical Fibers from room temperature to the experimental space, based on hermetic fiber feedthrough bulkheads with either FC/PC or FC/APC connectors. This approach offers both flexibility and easy service of the fiber lines.

Most commercially available optical fibers can be used with this solution, with respect to wavelength and polarization maintaining properties. Our solutions include polarization maintaining, single mode, and multimode fibers, with most common wavelength ranges available.

Product Highlights

1.0

Optical Fibers

Measurement Infrastructure

Functional and Robust

Optical fiber sets have been designed for our standard set of ports. Solutions are tested to function in the cryogenic environment of our systems and survive repeated thermal cycling.

Easy Installation and Maintenance

Installation sets provided with our optical fibers enable easy installation and maintenance.

Optical Fibers Based on Experimental Needs

Optical fiber solutions can be optimized based on experimental needs. Our solutions are compatible with most available optical fibers to enable a wide possible wavelength range and different kinds of polarization maintaining properties.

Technical Specifications

2.0

Optical Fibers

Measurement Infrastructure

Optical fiber installation sets are available in two different configurations, with a smaller box outside the cryostat for 1–4 fibers or a larger box for 1–8 fibers. Both are available for KF25 and KF40 ports. Optical feedthroughs are available in M10 and M12 sizes and the fibers are ordered according to your needs.

We offer special patch cords that are optical fibers adapted to low-temperature and high-vacuum applications by optimizing the fiber assemblies with a Polyimide coating and very low outgassing adhesive to seal the fiber’s ferrule. The typical operating temperature range of the patch cords is 0.05−3 Kelvin. Both M10 and M12 form factors are available.

The patch cords are routed into the cryostat through hermetic feedthroughs that ensure a high level of hermeticity, better than 10-8 mbar l/s.

These feedthroughs are built with an internal fiber rod identical to the fiber used upstream and downstream. Both M10 and M12 form factors are available. Depending on these sizes, the feedthroughs can be made with polarization maintaining (PM) fibers as well as with any single mode (SM) fibers. They can also come with multimode (MM) graded index (GI) fibers or step index (SI) fibers.

For fibers with a maximum cladding diameter of 125 µm, the feedthroughs can be terminated with FC/PC or FC/APC connectors. For core diameters up to 1000 µm, the feedthroughs come with SMA termination.

Optical Fiber Installation Set

3.0

Optical Fibers

Measurement Infrastructure

The optical fiber installation set is mounted on any of the available KF25 or KF40 ports. Solutions also exist for installation into side-loading ports.

The installation sets at RT can accommodate either 4 or 8 M10/M12-size feedthroughs for each port. To guide the fibers down to MXC Flange and for thermalization purposes, a fiber clamp holder is anchored to each temperature stage flange. The fibers are terminated in an FC/PC or FC/APC bulkhead.

Technical Requirements

4.0

Optical Fibers

Measurement Infrastructure

SD

Free KF25 port or KF40 port for installation.

LD

Free KF25 port or KF40 port for installation.

LD450sl

Free KF40 port or side-loading port for installation.

XLDsl

Free KF40 port or side-loading port for installation.

Fast Sample Exchange System

Free mounting point for fiber clamps.

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