What safety feature can be used for temporary laser operation situations?

The correct choice is the keyed interlock systems that prevent unauthorized access. This safety feature is particularly valuable in temporary laser operation situations, as it acts as a physical barrier that restricts use to authorized personnel only. By requiring a key to unlock and access the laser system, these interlock systems help prevent accidental or unauthorized use, which is critical when operating lasers temporarily in varying environments or with different personnel.

Using a keyed interlock system is beneficial not just for safety, but also for compliance with regulations pertaining to laser safety. Such systems ensure that only trained individuals can operate the laser, thereby reducing the risk of accidents or injuries during temporary operations.

In comparison, while automatic shutoff systems, emergency stop buttons, and standard operating procedures all contribute to overall safety, they serve different purposes. Automatic shutoff systems can help manage ongoing operations but do not prevent unauthorized access before operation begins. Emergency stop buttons are critical for immediate cessation of laser function in emergencies but do not control who has the right to engage the laser initially. Standard operating procedures provide necessary guidelines but rely on personnel following them correctly, without an enforced access control mechanism like a keyed interlock.