Calibration of laser interferometer at The National Laboratory

The national laboratory for length and dimensional metrology offers calibration of laser sources used in interferometry.

This service is also relevant in: Fiber optics and photonics, Metrology, Production and manufacturing

Service details

Service: Calibration of laser interferometer at The National Laboratory
Instrument: Lasers
Metrology Area: Length and geometry
Delivery level: National Metrology Institute
Price: Price on request.
Preparations: If you are interested in calibrating environment sensors belonging to the laser system, please mention this when ordering the calibration.

Carl-Henrik Hanquist

Forskare

+46 10 516 54 59 Read more about Carl-Henrik

Contact for the national laboratory for dimension

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Purpose

The national laboratories are responsible for maintaining the national reference standards for each measurement quantity and spreading metrological competence and traceability to industry and society at large. The national reference standards are the highest level of traceability in Sweden.

A calibration performed at a national laboratory fulfils all typical traceability and accreditation requirements that commonly exist in industry and society at large.

Method

Calibration of the object’s laser frequency is performed via heterodyne measurement against one of Sweden’s primary standards for optical frequency. The standards are Iodine-stabilized He-Ne lasers with a laser frequency in agreement with BIPMs recommended values for the realization of the metre in the mise en pratique.

The results from the calibration are:

Measured vacuum wavelength
Relative deviation from the specified vacuum wavelength
Difference between longest and shortest measured wavelength
Diagram showing the relative deviation of the vacuum wavelength from specified vacuum wavelength

Finally the optical power is measured and a system check of the object is performed against one of our own interferometers over a distance of 3 m.

The laser frequency calibration certificate is issued under the CIPM MRA.

Deliveries

The calibration results are reported in a digital calibration certificate in Swedish or English which states that the calibration was performed at a national laboratory.

When becoming a client you will also get access to our customer website for calibration, where you may also place orders.

Customer website for calibration

Related

Length and Dimensional Metrology

RISE is Sweden's NMI (National Metrology Institute) and, according to the Swedish constitution, is responsible for the fundamental measurement quantities in the International System of Units, SI.

How a metre became a metre

Today, measuring a metre is hardly a major achievement; historically, however, arriving at exactly how long a metre should be has engaged the intellects of philosophers, clergymen and scientists. RISE is designated as Sweden’s National Metrology Centre for the International System of Units (SI) and as such is home to the Swedish standard metre.

Calibration of 633 nm HeNe-lasers at The National Laboratory

The National Laboratory for Length and Dimensional Metrology offers calibration of HeNe-Laser sources at 633 nm.

Metrology / Service

Coordinating your calibration needs

RISE has a coordinator function for all customer with issues related to calibration. Through this service we can more easily make our range of calibration services available so that you as a customer can have a single entrance for questions about calibration, prices, agreements, quotes and more.

National Metrology Institute

The basis for a meter being the same length in Stockholm as in Tokyo, and for efficient world trade, research and industry, is traceability through international comparisons and national standards. Without assured traceability, companies risk producing faulty products, incurring increased costs and losing the confidence of their customers. National measurement laboratories represent the top level of the metrological chain, carrying out measurements with the lowest possible uncertainty, which enables the calibration of all measuring instruments throughout the traceability pyramid. As Sweden's National Metrology Institute, RISE operates 14 national measurement laboratories covering 32 physical quantities, and represents Sweden in international metrology contexts through EURAMET and the Mutual Recognition Arrangement (MRA). RISE's national measurement laboratories offer advanced calibrations with the lowest possible measurement uncertainties for those requiring the highest level of metrology. We maintain national standards such as the national kilogram, the UTC(SP) timescale and fixed-point cells for temperature, and we can calibrate your reference instruments directly against these. Through long-term research and development, we create new measurement methods and standards that are adapted to future technology and industrial needs. We also carry out international comparison measurements to ensure that Swedish calibration certificates are recognised globally, facilitating your exports and international collaborations.