What Type of Barrier or Curtain Do I Need for a 1060–1080 nm Fiber Laser?

Lasers operating between 1060 and 1080 nm are common in industrial applications such as laser welding, laser cleaning, cutting, marking, and engraving.

These systems are often high-power Class 4 lasers and may require an appropriate containment system to restrict hazardous laser radiation to the laser controlled area.

However, there is no single barrier or curtain rating that is automatically required simply because a laser operates at 1064 nm, 1070 nm, or another wavelength in this range.

The appropriate solution depends on both the barrier material and how the containment system is designed and positioned.

First, verify the operating wavelength specified by the laser manufacturer.

Common wavelengths in this region include:

Barrier performance can be wavelength-dependent because materials interact differently with laser radiation at different wavelengths.

Laser Safety Industries performs irradiance testing at 1064 nm for barriers intended for common near-infrared fiber laser applications. Many industrial fiber lasers operate at 1070 nm or other nearby wavelengths within the broader 1060–1080 nm region.

Based on the barrier material, available testing, application, and expected exposure, Laser Safety Industries may recommend these barriers for appropriate applications within the broader 1060–1080 nm range.

However, this should not be interpreted to mean that the barrier has been independently irradiance-tested at every individual wavelength between 1060 and 1080 nm.

The specific test wavelength and test conditions should be distinguished from the broader range of applications for which a barrier may be recommended.

For this reason, always verify the actual operating wavelength when evaluating a laser safety barrier.

One of the most common misconceptions is that the laser's rated power should be matched directly to the barrier's irradiance rating.

For example:

“I have a 2,000 W fiber laser, so I need a 2,000 W/cm² barrier.”

That comparison is not correct.

Laser power is typically expressed in watts (W).

Irradiance describes power distributed over an area and is commonly expressed in watts per square centimeter (W/cm²).

A 2,000 W laser therefore does not automatically create an irradiance of 2,000 W/cm² at the containment boundary.

Beam size, divergence, distance, reflections, process geometry, and other factors influence the amount of laser energy reaching the barrier.

Laser safety barriers and curtains are generally used to help contain hazardous laser radiation within a controlled area.

They should not automatically be treated as surfaces intended to receive a continuously focused primary beam.

If a focused industrial fiber laser is intentionally held against a barrier long enough, any practical barrier material has a finite damage threshold.

The laser system should instead incorporate appropriate beam control and termination so that the containment boundary is not being used as the normal beam stop.

The barrier then provides an additional containment boundary against reasonably foreseeable laser radiation that could reach it.

The amount of laser radiation reaching a barrier can be very different from the output of the laser at its source.

For example, laser energy that is diffusely reflected from a workpiece can spread over a larger area as it travels away from the process.

As that energy spreads, its irradiance generally decreases.

Distance, however, should not simply be assumed to make an exposure safe.

The hazard evaluation should consider the actual geometry of the system and reasonably foreseeable worst-case beam paths and reflections.

Watch: How Laser Energy Spreads and Decreases With Distance

The type of exposure that could reach the barrier is also important.

A direct beam can maintain a highly concentrated amount of laser energy.

A specular reflection can remain directional and potentially retain substantial irradiance.

A diffuse reflection scatters laser energy over a wider range of directions, generally reducing irradiance as the energy spreads.

However:

Diffuse does not automatically mean safe.

High-power Class 4 fiber lasers can produce hazardous diffuse reflections, particularly close to the process.

Watch: Direct, Specular & Diffuse Laser Reflections Explained

The demonstration uses a visible laser so the beam paths can be seen. Radiation from a 1060–1080 nm fiber laser is invisible, and material reflection and absorption are wavelength-dependent.

Once the application and potential exposure at the containment boundary are understood, the next question is often whether to use a softwall curtain or hardwall barrier.

Softwall systems can be useful when the application requires:

They are commonly used to establish laser controlled areas around industrial laser processes.

Hardwall barriers may be preferable when the application calls for:

Neither format is automatically safer for every application.

The appropriate choice depends on the expected exposure, layout, application, and operational requirements.

There is no universal rule that says:

2 kW laser = X W/cm² barrier

or:

6 kW laser = Y W/cm² barrier.

For many applications, selecting an appropriate laser safety barrier does not require calculating every possible laser parameter.

Laser Safety Industries can typically make a practical recommendation based on the wavelength, laser power, application, expected exposure, barrier location, containment geometry, and our experience with similar laser systems.

For 1060–1080 nm fiber lasers, we have also developed a practical starting point for comparing common laser powers and barrier options:

What Laser Barrier Rating Do You Need for a 1060–1080 nm Fiber Laser? A Practical Rule of Thumb

These recommendations are intended as starting points rather than substitutes for the laser hazard evaluation. The appropriate containment ultimately depends on the actual application and reasonably foreseeable worst-case exposure conditions.

Pulsed and ultrafast lasers sometimes require additional consideration because their exposure characteristics cannot always be directly compared with a barrier's published CW irradiance test conditions.

In those cases, additional laser specifications may be needed to better understand the application.

When a laser barrier is listed with an irradiance rating, the test conditions matter.

A published rating may specify:

Those conditions describe a particular controlled test. A published test wavelength should not be interpreted as testing across an entire surrounding wavelength range unless that broader range was specifically tested.

They should not be interpreted to mean that the barrier can indefinitely withstand any laser producing less than a particular total wattage.

Likewise, a higher irradiance rating does not mean that normal laser safety practice should intentionally direct the primary operating beam onto the containment boundary.

Even an appropriately selected barrier material only protects the area it actually covers.

The overall containment system should consider:

The appropriate layout should be determined from the actual application and hazard evaluation.

Radiation between approximately 1060 and 1080 nm is near-infrared and invisible to the human eye.

This means personnel cannot rely on seeing the operating beam or its reflections to determine where hazardous radiation may be present.

Appropriate containment should therefore be based on the laser hazard evaluation and system geometry, rather than visual observation of the beam.

Laser barrier selection involves more than simply choosing an irradiance rating. Barrier material, configuration, testing, placement, exposure conditions, and the overall containment layout can all be relevant.

For additional guidance on laser curtains, hardwall barriers, window coverings, barrier testing, irradiance, and containment, visit our:

Laser Safety Barrier Resource Center

There is no single laser curtain or barrier that should automatically be selected based only on the wattage of a 1060–1080 nm fiber laser.

Instead, consider the actual wavelength, application, expected exposure at the containment boundary, barrier location, system geometry, and reasonably foreseeable worst-case beam paths and reflections.

The barrier's published test conditions—including wavelength, irradiance, beam size, and exposure duration—can then be considered when evaluating an appropriate containment solution.

For many common fiber laser applications, Laser Safety Industries can make a practical barrier recommendation based on the basic system and application information without requiring an exhaustive calculation of every laser parameter.