Laser Safety

Lasers are used in a variety of teaching, research, and operational settings and can present serious hazards if not used properly. Laser safety practices are designed to protect against eye injuries, skin exposure, and other risks associated with laser use.

All laser users are responsible for understanding the hazards of their equipment and following established safety procedures.

Never operate a laser without proper training, protective equipment, and understanding of its hazards.

When should I follow laser safety practices?

Operate or work near laser equipment
Align, maintain, or service lasers
Work in areas where lasers are in use
Handle Class 3B or Class 4 lasers
Enter designated laser-controlled areas

Do not use if:

You have not received appropriate training
Required safety controls or protective equipment are not in place
The laser is damaged, modified, or not functioning properly
Warning signs or labels are missing
You are unsure of the laser classification or hazards

What to do instead:

Stop work and do not operate the laser
Notify your supervisor or principal investigator
Contact Environmental Health and Safety (EHS) for guidance
Ensure proper training and controls are in place before use

Key laser safety practices

Never look directly into a laser beam or at reflections
Use appropriate laser safety eyewear when required
Keep beam paths controlled and below eye level whenever possible
Remove reflective items (e.g., jewelry, tools) from the work area
Ensure protective housings and interlocks are in place
Post appropriate warning signage for laser-controlled areas

Laser classifications

Class 1: Safe under normal conditions
Class 2: Low-power visible lasers; avoid direct eye exposure
Class 3R / 3B: Moderate risk; eye protection may be required
Class 4: High risk; can cause serious eye and skin injuries and may pose fire hazards

Higher-class lasers require additional controls, training, and supervision.

Controlled areas and signage

Areas where certain lasers are used must be clearly marked with warning signs. Access may be restricted to trained and authorized personnel. Always follow posted instructions before entering a laser-controlled area.