Checklist safety measures lasers & laser rooms

Part A: Checklist safety measures lasers & laser rooms

Part B: User instructions

Part A

Checklist safety measures lasers & laser rooms

1

Laser requirements.

Laser classification

 

1

1M

2

2M

3R

3B

4

1.

Every laser has been classified correctly.

M

M

M

M

M

M

M

2.

The laser has a label that lists the type of laser, the classification and beam power.

M

M

M

M

M

M

M

3.

The laser can only be turned on with a key switch.

-

-

-

-

M

M

M

4.

The laser has been constructed in such a way that after it is turned off or fails, whichever the cause, in can only be turned back on with the key switch.

-

-

-

-

M

M

M

5.

The laser has an indicator that lights up when a beam is being generated in the laser.

-

-

-

-

M

M

M

6.

There is a laser emergency stop which completely shuts down the laser.

-

-

-

-

-

M

M

7.

If the laser is in standby mode, a valve or attenuator in the laser blocks the beam.

-

-

-

-

M

M

M

8.

This valve or attenuator is remote-controlled.

-

-

-

-

-

R

M

9.

The laser has electric contacts that can be used for an interlock system. This system ensures that the laser shuts down automatically or that the beam can no longer leave the laser.

Depending on the set-up and situation, a judgement must be made as to where to make a connection (door, curtain, hood, etc.).

-

-

-

-

-

R

M

10.

Above or at the laser is a yellow warning sign (or sticker) stating danger: laser. (Not necessary for a closed laser system)

-

-

-

-

R

M

M

11.

A security mechanism is installed to prevent uncontrolled start-up of a laser or an unintended 'firing' of a pulse laser by means of a correct execution of a combination of key switches and switch buttons.

-

-

-

-

-

M

M

12.

The net and high voltage parts are required to be fully and safely covered (if present: high voltage danger sign mandatory)

M

M

M

M

M

M

M

R = Recommended

M = Mandatory

2

The laser lab. (only for lasers with a 3b and 4 classification)

Laser classification

 

1

1M

2

2M

3R

3B

4

1.

At the workplace and near the access door there is a so-called emergency assistance button which, when pressed, will shut down the laser, automatically release the door and turn on the laser alarm installation.

-

-

-

-

-

M

M

2.

Above the access door sits a light box with the text 'laser on' on it, which will automatically light up if the power supply of the laser has been switched on.

-

-

-

-

-

M

M

3.

The laser room or sub room has to be screened in such a way that no laser beam can come outside.

-

-

-

-

-

M

M

4.

A warning sign with danger sign has been installed on the access door.

-

-

-

-

-

M

M

5.

If there is more than one laser set-up the room has been divided into adequately screen sub rooms with one laser set-up each.

-

-

-

-

-

M

M

6.

Effective measures have been taken in order to prevent unwanted from people entering. (for example, a combination lock)

-

-

-

-

-

M

M

7.

There is proper lighting + emergency lighting.

-

-

-

-

-

M

M

8.

There are no unnecessary mirror-reflective surfaces. Components and objects on the experiment table are required to have been finished with a diffuse reflectiveness for the respective wavelength.

-

-

-

-

-

M

M

9.

There is sufficient ventilation and proper point exhaustion in places where harmful vapours can develop.

-

-

-

-

-

M

M

10.

There are sufficient and approved safety glasses available for the wavelength and power density to be used.

-

M

M

M

M

M

M

11.

There are sufficient and appropriate portable extinguishing agents available.

-

-

-

-

-

M

M

12.

The laser lab may not be used as storage.

-

-

-

-

-

M

M

13.

Flammable liquids that are necessary to use are required to be placed in an extra metal casing.

-

-

-

-

-

M

M

R = Recommended

M = Mandatory

3

Closed laser systems.

Laser classification

 

1

1M

2

2M

3R

3B

4

1.

The case material should be able to withstand long-lasting exposure to the beam.

-

-

-

-

-

M

M

2.

This case is completely closed and has been properly inspected to this end, for the wavelength to be used.

-

-

-

-

-

M

M

3.

Any possible eyehole is covered with a fixed filter of sufficient optical density.

-

-

-

-

-

M

M

4.

Doors of completely closed sample and processing rooms, as well as lids and covers have interlock switches. (the same function as with open laser systems)

-

-

-

-

-

M

M

5.

A laser emergency stop has been installed in a notable and accessible place.

-

-

-

-

-

M

M

6.

Above the case hangs an information sign stating "closed laser system".

-

-

-

-

-

M

M

7.

In case there is a chance that toxic gases can be formed, appropriate exhaustion is in place.

-

-

-

-

-

M

M

R = Recommended

M = Mandatory

Part A: Checklist safety measures lasers & laser rooms

Part B: User instructions

Part B

User instructions

1

Organization.

Laser classification

 

1

1M

2

2M

3R

3B

4

1.

Intended procurement and presence of all lasers have been reported to the manager.

-

-

-

-

-

M

M

2.

Where the right facilities exist, the set-up has been placed in a closed laser system.

-

-

-

-

-

M

M

3.

The person responsible for the general safety at the site with lasers has been identified.

-

-

-

-

-

M

M

4.

Laser workers can make use of a Preventive Medical Examination (PMO). Point out the possibility to new members of staff.

-

-

-

-

-

M

M

5.

The laser workers have received instruction about working with lasers. They have been told of the dangers with alignment in particular.

-

-

-

R

R

M

M

6.

The laser workers have received written instructions about working with lasers.

-

-

-

M

M

M

M

7.

It is known that all (laser) emergencies have to be reported by means of the accident report fom (HR website) and to the HSE contact person (for example exposure of eye to beam)

M

M

M

M

M

M

M

8.

It is known that any dangers and shortcomings in the security have to reported to the HSE contact person immediately.

M

M

M

M

M

M

M

9.

Has a log been established?

-

R

R

R

M

M

M

R = Recommended

M = Mandatory

2

Planning of the laser set-up

Laser classification

 

1

1M

2

2M

3R

3B

4

1.

In principle use is made of the minimum amount of power with which the intended experiment can be performed. (alara)

-

-

--

-

-

M

M

2.

The beam path is as short as possible and does not contain any superfluous optical components.

-

-

-

-

-

R

M

3.

At laser set-ups, a screen has been installed at the edge of the optical table that reaches above the height of the beam to ensure that the beam cannot leave the table.

-

-

-

-

-

M

M

4.

The beam is required to be screened off as much as possible with beam pipes or, if at all possible, to be transferred with glass fibre optics.

-

-

-

-

R

M

M

5.

Every beam has an effective beam stop.

-

R

R

R

M

M

M

6.

All components that influence the beam have been properly fixated.

 

 

 

 

 

 

 

7.

There may not be any superfluous or unused components present on the work table.

-

R

R

R

R

M

M

8.

In a set-up with a pump laser, the beam path of the pump laser has been screened in its entirety.

-

-

-

-

-

M

M

9.

If possible, set up the laser (beam) vertically.

R

R

R

R

R

R

R

R = Recommended

M = Mandatory

3

General work instructions.

Laser classification

 

1

1M

2

2M

3R

3B

4

1.

Only laser workers are allowed to enter the laser room; other people may only enter the room with permission and under the supervision of the laser workers.

-

-

-

-

-

M

M

2.

Only laser workers are allowed to operate the lasers.

-

-

-

-

-

M

M

3.

It is prohibited at all times to look into the beam.

-

-

-

M

M

M

M

4.

If there is a beam, wearing approved safety glasses appropriate for the used wavelength and power density is mandatory.

-

-

M

-

M

M

M

5.

It is required to issue a warning before 'firing' a pulse laser or starting a continuous laser.

-

-

R

R

R

R

R

6.

A warning is issued for parasitic reflections at beam splinters, transparent surfaces and diffuse reflective surfaces.

-

-

-

-

-

M

M

7.

A warning is issued for a parasitic beam at the back of a high-powered laser.

-

-

-

-

-

M

M

8.

A warning is issued for chemical dangers (especially reactions) and electrical dangers. (especially high voltage)

-

-

R

R

R

M

M

R = Recommended

M = Mandatory

4

Alignment protocol.

Laser classification

 

1

1M

2

2M

3R

3B

4

1.

Alignment occurs while wearing eye protection which has such an optical density that the beam can be followed, whether with tools or not. (alignment glasses)

-

-

-

-

-

M

M

2.

Alignment occurs, if possible, with an alignment laser in the same beam path or with minimal power, possibly maximum debilitation.

-

-

-

-

-

M

M

3.

Tools are used to enable the workers to see the beam, for example infrared viewer, fluorescence screen, smoke and the like.

-

 

-

-

-

M

M

4.

After the alignment, each optical component in the beam path will be inspected for parasitic beams.

-

-

-

-

-

M

M

5

Laser classifications can alter after alignment if the screening is removed. Apply the correct laser classification with regards to the protective measures during alignment. Keep in mind any bystanders.

 

 

 

 

 

M

M

R = Recommended

M = Mandatory