ES&H Manual



6410 Appendix T1

Laser Operational Safety Procedure (LOSP)



1.0             Purpose


Jefferson Lab has determined that Class 3B and Class 4 laser light poses an unmitigated Risk Code>2; therefore, in accordance with ES&H Manual Chapter 3210 Work Planning, Control, and Authorization Process, a separate work control document is required for each piece of equipment or system, and the area where it is located. This Laser Operational Safety Procedure (LOSP) has been developed to ensure hazard issues, identified through a Task Hazard Analysis, are adequately addressed, and appropriately mitigated, before activities involving lasers are approved and commenced.


2.0             Scope


LOSPs addresses minimum safety requirements to mitigate the hazard issues associated with lasers. This does not preclude the need to incorporate additional activities to ensure the safety of people, equipment, and the environment for activities associated with laser work.


LOSPs are considered work control documents and follow the same requirements as defined in ES&H Manual Chapter 3310 Operational Safety Procedure Program including triennial reviews. If LOSP content is reviewed by affected parties and found to be current and appropriate, the document need not be rewritten; however, the same rigor of review and approval applies as if the document were written as new.


The process steps for this procedure are performed in coordination with ES&H Manual Chapter 6410 Laser Safety Program.


3.0             Responsibilities

NOTE:           Management authority may be delegated to a task qualified Jefferson Lab employee at the discretion of the responsible manager.


3.1              Document Owner

NOTE:     The individual responsible for the implementation of the document is the “Document Owner” even if another individual initiates the document.

·         Is a Jefferson Lab employee.

·         Develops a LOSP for a particular laser equipment/system or location in accordance with the Section 4.0 Process Steps of this procedure.

·         Acquires appropriate review and approval signatures prior to initiating the procedure.

·         Forwards an official copy of the approved LOSP to ES&H Document Control.


3.2              Laser System Supervisor (LSS)

·         Approves the LOSP or justifies the need for revision/re-submittal.

o   If appropriate, personally inspects the relevant area with the document author and the Laser Safety Officer prior to recommending approval.

·         Provides specific laser system training and maintains record of approved users.

·         Ensure laser users have all applicable training (such as LTT, Electrical Safety, Fire Safety) as identified in the THA.

·         Implements the approved LOSP:

o   Posts the LOSP at the entry way or near the equipment covered by the document.

o   Ensures affected personnel are aware of the procedure.

o   Ensures that those who need the procedure are trained and a list is maintained of those individuals.

o   Verifies the effectiveness of the procedures by periodic job walk-throughs and procedure reviews.

o   Integrates self-assessment findings, continuous improvements, and lessons learned as appropriate.

·         Reviews and updates the LOSP prior to expiration and whenever there is a change that affects the laser system.


3.3              Laser Safety Officer

·         Reviews the list of subject matter experts (SME) required to approve the document and ensures it is adequate for the hazards identified.

·         Approves the LOSP or justifies the need for revision/re-submittal.

o   If appropriate, personally inspects the relevant area with the document author and the Laser System Supervisor prior to recommending approval.


3.4              Division Safety Officer and Department or Group Head

·         Reviews and, if adequate, approves the LOSP to ensure work processes and hazards have been addressed. 


3.5              ES&H Document Control

·         Provides the document serial number.

·         Records the serial number, Document Owner, expiration dates, and content in the Jefferson Lab authorized electronic filing system.

·         Registers the Document Owner and Department/Group Head. 

·         Maintains a record of all active and expired LOSPs. 

·         Ensures electronic files are accessible and current.


4.0             Process Steps


Step 1:            Task Hazard Analysis

·         Use the Task Hazard Analysis Worksheet (see ES&H Manual Chapter 3210 Appendix T1 Work Planning, Control, and Authorization Procedure) to outline the task steps or services required for an area or piece of equipment. Identify known and potentially hazards conditions, suspected causes, and environmental concerns. 

·         Identify required Safety Procedures/Practices/Controls/Training.


Click for Laser Operational Safety Procedure (LOSP)  THA Guidance


NOTE:     All Class 4 lasers possess the potential to ignite fires. When these systems are installed, contact the Laser Safety Officer to determine whether smoke detector interlocks are required. Systems that are located in the unique scientific installations (e.g. Halls, Tunnel, and FEL) require smoke detector interlocks. Once installed, interlocks are to be reviewed by the Fire Protection Engineer.  


NOTE:     Laser Optical Fiber Systems – Optical fibers or optical fiber cables attached to Class 3B or Class 4 lasers or laser systems shall not be disconnected prior to termination of transmission of the beam into the fiber. LOTO shall be applied at the laser source to prevent inadvertent personnel exposure from an un-terminated or severed fiber. In cases where laser radiation above the applicable Maximum Permissible Exposure (MPE) can be made accessible by disconnection of a connector, the connector shall bear a label or tag bearing the words “Hazardous Laser Radiation when Disconnected”. 


Step 2:            Laser Operational Safety Procedure (LOSP) Coversheet

Click for

Laser Operational Safety Procedure

(LOSP) Form

·         Complete the LOSP cover sheet identifying the area/equipment.

·         Identify the appropriate individuals required to review and approve the document including the Subject Matter Expert for all hazard issues identified in Task Hazard Analysis.


Step 3:            Procedure Development

LOSP Document Requirements


·   In areas containing more than one laser, define operational sequence or parameters.


Only those authorized by the LSS are permitted to enter the location noted on the cover sheet of this document.

·   Training and qualification requirements (including refresher training).

·   Medical requirements.

·   Spectator protection requirements.



·   Laser system specifications.

·   Define laser system components.

·   Copy of laser operating manuals or reference the location of the manual(s).



·    Laser-specific hazards. 

·   Occupational exposure hazards beyond laser light (e.g. fumes, noise, etc.).

·   Credible non-beam hazards (e.g. environmental hazards).

·   Describe all required personal protective equipment ES&H Manual Chapter 6410 Appendix T3 Laser Personal Protective Equipment (PPE) (include clothing requirements (e.g. no reflective jewelry etc.)).

·   Control of Hazardous Energy (includes beam and non-beam hazards such as electrical)

Laser Environment

System designs, including interlocks, require hazard evaluation review by SME.


·    Layout of the laser controlled area and/or table.  (Show beam location in relation to user (waist height preferable).)

·   Interlock schematic (or similar) (including smoke detector interlocks).

·   Room lighting conditions during laser use and alignment procedure(s).

·   Targets.

·   Primary and all likely beam paths (open or enclosed).

Written Procedure

for Use




·   All process steps – including unattended operation controls.

·   All process steps for detailed alignment – Include manufacturer’s protocols for alignment.

·   Maintenance and service.

·   Off-normal and emergency procedures (e.g. beam loss, fire).

Laser Controls

·   Describe all controls (administrative and engineering). If a different control is recommended the rationale for not using a typical/recommended control.

Required Calculations

·   Maximum permissible exposure.

·   Optical density.

·   Nominal hazard zone.


(See ES&H Manual Chapter 6410 Appendix T5 Laser Labeling/Posting Requirements.

·   Equipment/area labeling/posting requirements.

·   Area signs.


Step 4:            Review and Approval

·         Submit the completed LOSP in accordance with ES&H Manual Chapter 3310 Appendix T1 OSP and TOSP Instructions Sections:

o   Section 4.2 Submit Draft Procedure for Initial Review

o   Section 4.3 Submit for Electronic Signatures and subsections.

o   Section 4.4 Review

o   Section 4.5 Approve

·         When all reviews and approvals have been received, perform process accordance with ES&H Manual Chapter 3310 Appendix T1 OSP and TOSP Instructions Sections

o   Section 4.6 Document

o   Section 4.7 Implement


5.0             Revision Summary


Revision 1.4 – 02/27/20 – Added LOSP THA Guidance per CATS#NE-2019-08-04-01

Revision 1.3 – 09/20/19 – Updated TPOC from B.Manzlak to P.Collins; added NOTE to address fiber optics; added expectation to LSS responsibilities to ensure all applicable training of the laser user is verified; added requirement to identify Control of Hazardous Energy per CATS# NE-2019-08-03-01

Revision 1.2 – 09/01/18 – Updated electronic LOSP review/approval process

Periodic Review – 12/22/15 – No changes per TPOC

Revision 1.1 – 07/01/14 – TPOC changed from D.Owen to B.Manzlak

Revision 1.0 – 12/06/10 – Updated to reflect current laboratory operations











ES&H Division

Paul Collins





This document is controlled as an on-line file.  It may be printed but the print copy is not a controlled document.  It is the user’s responsibility to ensure that the document is the same revision as the current on line file.  This copy was printed on 2/27/2020.