Calibration, Repair, and RMA

The Value of a Coherent Calibration

When you send your meter or sensor back for service, Coherent provides much more than just a calibration.

Many of our meters and sensors service items include both calibration and minor repairs. This means that in addition to calibration we replace damaged components and recertify the product as able to perform to the same specifications as when it was new.  In addition, eligible products receive an extended 12 month warranty following recertification. This is the same 12 month warranty we offer on a brand new product.

A large percentage of our calibrations are performed within five business days, and expedited service is available, to minimize our customer’s downtime.

Calibration of a Coherent power and energy laser measurement product includes:

  • Calibration to original uncertainty levels
  • Minor repairs (see note below)
  • Extended 12 month warranty, on eligible products
  • Fast calibration turn around time.

Minor repairs includes fixing manufacturer’s defects, hardware updates, firmware, software updates, damaged connectors, and other small repairs. Detector element replacement due to laser damage and damage caused by negligent use is not covered – for customer caused damaged an additional repair service charge is applied.

This level of service results in an overall lower cost of ownership for our customers. Those customers who routinely send products in for annual calibration are realizing a lifetime warranty for their products.

By choosing Coherent you are choosing a company you can rely on for fast delivery, low warranty rate, and lower overall cost of ownership.

Recertify Once a Year 

Coherent laser power and energy meters are precision instruments, capable of delivering very accurate measurements as well as providing many years of useful service. To maintain this high level of performance, and to ensure compliance with your quality and ISO certification, it is important to have your measurement system serviced and recertified once per year.

Extended use of laser power and energy meters and sensors, as well as environmental factors, can have an adverse effect on accuracy and also result in wear and/or damage to parts critical to optimum performance.

Coherent Calibration Facilities and Capabilities: ISO 17025 Accredited

As the world's largest laser manufacturer, Coherent calibration facilities contain the widest possible range of light sources from 193 nm to 10,600 nm, with powers ranging nanowatts to kilowatts.  

Coherent's investment in service and calibration facilities and personnel is an on-going process, and we strive to maintain our unique technological edge. 

Coherent Wilsonville, Oregon, and its satellite sites, are fully accredited to ISO/IEC 17025:2017 by ANAB - The ANSI National Accreditation Board. ANAB is a signatory of the International Accreditation Forum (IAF) and International Laboratory Accreditation Cooperation (ILAC) multilateral recognition arrangements. ANAB has signed the MRAs of the InterAmerican Accreditation Cooperation (IAAC) and the Asia Pacific Accreditation Cooperation (APAC). Accreditation to ISO/IEC 17025 is the formal recognition that a calibration laboratory is technically competent to carry out specific calibrations.

A detailed discussion of the Scope of Accreditation and the Technical Requirements of ISO 17025 Accreditation can be found on our ISO 17025:2017 Accreditation web page. 

In addition, Coherent team delivers the industry's best service, with a knowledgeable and responsive staff, and rapid turnaround.

To arrange for warranty service or annual recalibration, contact your closest Coherent service center to obtain a Return Material Authorization (RMA) number.

Please have the following information available:

  • Model Number
  • Serial Number
  • Purchase Order Number
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How long will it take?

After receiving the item to be serviced and following customer approval to proceed with the work, we are typically able to ship your product back within five working days. Some products take longer, and many products are turned around faster than this. Expedited service, including 24-hour service, is available for an additional charge.

RMA - Instructions for Returning Equipment for Repair and Calibration

To prepare your instrument meter or sensor for return to Coherent, make a tag that includes the name and address of the owner, the contact individual, the serial number, and the RMA number you received from Coherent Customer Service. Attach this tag to the unit.

Wrap the product with polyethylene sheeting or equivalent material. If the original packing material and carton are not available, use a corrugated cardboard shipping carton with inside dimensions at least 6 in. (15 cm) taller, wider, and deeper than the product. The shipping carton must be constructed of cardboard with a minimum 375 lbs. (170 kg) test strength. Cushion the instrument unit in the shipping carton with packing material or urethane foam on all sides between the carton and the instrument or probe sensor. Allow 3 in. (7.5 cm) clearance on all sides, top, and bottom. Seal the shipping carton with shipping tape or an industrial stapler.

Shipping addresses for our repair and calibration facilities are given below:

Coherent Laser Measurement and Control Service Center
Attn: (your RMA number)
27650 SW 95th Avenue
Wilsonville, OR 97070

Coherent Shared Services B.V.
Dieselstr. 5 b 
D-64807 Dieburg

Coherent, Inc. Japan 
Atsugi Technical Center 
Toda 1042-4
Atsugi, Kanagawa Prefecture 
243-0023, Japan


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