R-on-1 LIDT test

R(amp)-on -1 testing protocol provides preliminary information about the LIDT of the surface-limited samples (e.g. fibers, small crystals). It is also used to investigate the conditioning effect.

R-on-1 test explained:

Use this test for:

  • Testing of preliminary LIDT of surface limited samples (such as fibers or samples with small aperture: when S-on-1 is unavailable);
  • Investigation of conditioning/annealing effect (in combination with 1-on-1);
  • Only relatively compare production processes or vendors;

Test description

To perform an R-on-1 test procedure several test sites (minimum – 1, typically – 10, best – as as many as possible) are selected on the test area. Each of those sites is interrogated with a laser irradiation level (for instance, fluence) that increases step wise. Starting from very low irradiation values, it is linearly or non-linearly increased until a damage event is detected or the maximum irradiation level of the system is reached.  Based on the application each test site can be exposed to single or multiple laser pulses (S) at each irradiation level.

Known limitations and risks:

  • Not suited for characterization of samples with low defect density;
  • Not suited for large optics characterization;
  • Provides only a rough (not accurate) estimate of LIDT value (order of magnitude);
  • Continuous laser interaction with the material might also cause conditioning (annealing) or fatigue (accumulation or incubation) effects, which compromises LIDT accuracy;
  • Might be time consuming if incremental fluence is too small;

Most popular test parameters for this test

Wavelength Pulse duration(1) Repetition rate Pulses per irradiation level Interested?
1064 nm 10 ns 100 Hz 1000 ORDER
532 nm 5 ns 100 Hz 1000 ORDER
355 nm 5 ns 100 Hz 1000 ORDER
Custom Check all availability or configure your own at my.lidaris.com

(1) effective pulse duration measured at Full Width Half Maximum


Check out all available testing capabilities. Identify your system in our “Available testing conditions” table.

Test bundles and packages

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  • Optics Characterization Bundle for CW regime at 1070 nm
    The testing package consists of multiple tests, which are carefully selected to address optics characterization issues at the CW regime.
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  • Lifetime + Certification Bundle for Industrial Grade fs-ps Laser Optics
    The package consists of several tests carefully selected to address optics certification for critical applications.
    Find out more

more tools
and useful information

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  • Testing conditions

    Check out all available laser damage testing conditions (wavelengths, pulse regimes, environments, and more).
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  • Laser Damage infobase

    Check out a useful glossary of terms and simple explanations related to the main topics of laser damage terminology.
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  • Online Fluence calculator

    Check out a calculator equipped with laser-related calculus that is frequently required in practice: such as laser fluence.
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  • Downloads and docs

    Here you can download all information about laser damage testing available at Lidaris.
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  • New client guide

    Here you will find usefull guidlines and suggestions for everyone, who is new the laser damage field.
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  • Orders FAQ

    Fast way to find out about test samples prepration, handling, and shipping.
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