EXAM: Laser Safety Officer (AF)|133 Questions
with Verified Solutions
Class 1 Laser Classification Correct Answer-- cannot emit laser radiation at levels that are
known to cause eye or skin injury during normal operation
-very low power or beam is fully enclosed
Class 1M Laser Classification Correct Answer--incapable of hazardous exposure conditions
during normal ops unless viewed with collecting optics (binoculars)
-exempt from control measures, other than to prevent optical aided viewing
-exempt from other forms of surveillance
Class 2 Laser Classification Correct Answer--low power, emit in visible spectrum (400-700
nm)
-not considered strong enough to damage eyes because a person will normally blink and look
away if it enters their eyes (aversion response)
Class 2M Laser Classification Correct Answer--potentially hazardous if viewed with
collecting optics
-upper limit on a continuous wave laser in this class is 500 mW
, EXAM: Laser Safety Officer (AF)|133 Questions
with Verified Solutions
Class 3R Laser Classification Correct Answer--intermediate powered, hazardous under
direct and specular reflection viewing
-can produce no more that 5 mW in the visible region
Class 3B Laser Classification Correct Answer--hazarous under direct and specular reflection
viewing
-not normally a diffuse reflection or fire hazard
operate between 5-500 mW for CW systems
cannot produce radiation energy greater than 0.125 J for pulsed systems
Class 4 Laser Classification Correct Answer--high power, hazardous to eye or skin from
direct beam
-may pose a diffuse reflection or fire hazard
-pose ancillary hazards including laser-generated air contaminants and hazardous plasma
radiation
, EXAM: Laser Safety Officer (AF)|133 Questions
with Verified Solutions
Laser components Correct Answer--pumping system
-lasing medium
-optical cavity
Pumping System Correct Answer--source of power that excites the lasing medium in order
to create photons for the laser beam
-can be an electrical source, a flash lamp or another laser
Lasing Medium Correct Answer--what determines the wavelength of the system
-four types: solid state, gas, dye, and semiconductor
Optical Cavity Correct Answer--contains the lasing medium and reflective mirrors that
guide the laser beam
-provide amplification to create the desired laser parameters
LASER acronym Correct Answer-Light
, EXAM: Laser Safety Officer (AF)|133 Questions
with Verified Solutions
Amplification by
Stimulated
Emission of
Radiation
Beam Characteristics Correct Answer--monochromatic
-coherent
-collimated
Monochromatic Correct Answer--light emitted by a laser is almost pure in color of a single
wavelength
Coherent Correct Answer--measure of the degree of phase correlation that exists in the
radiation field of a light source at different locations and different times
-waves are tightly in phase or in step with one another
with Verified Solutions
Class 1 Laser Classification Correct Answer-- cannot emit laser radiation at levels that are
known to cause eye or skin injury during normal operation
-very low power or beam is fully enclosed
Class 1M Laser Classification Correct Answer--incapable of hazardous exposure conditions
during normal ops unless viewed with collecting optics (binoculars)
-exempt from control measures, other than to prevent optical aided viewing
-exempt from other forms of surveillance
Class 2 Laser Classification Correct Answer--low power, emit in visible spectrum (400-700
nm)
-not considered strong enough to damage eyes because a person will normally blink and look
away if it enters their eyes (aversion response)
Class 2M Laser Classification Correct Answer--potentially hazardous if viewed with
collecting optics
-upper limit on a continuous wave laser in this class is 500 mW
, EXAM: Laser Safety Officer (AF)|133 Questions
with Verified Solutions
Class 3R Laser Classification Correct Answer--intermediate powered, hazardous under
direct and specular reflection viewing
-can produce no more that 5 mW in the visible region
Class 3B Laser Classification Correct Answer--hazarous under direct and specular reflection
viewing
-not normally a diffuse reflection or fire hazard
operate between 5-500 mW for CW systems
cannot produce radiation energy greater than 0.125 J for pulsed systems
Class 4 Laser Classification Correct Answer--high power, hazardous to eye or skin from
direct beam
-may pose a diffuse reflection or fire hazard
-pose ancillary hazards including laser-generated air contaminants and hazardous plasma
radiation
, EXAM: Laser Safety Officer (AF)|133 Questions
with Verified Solutions
Laser components Correct Answer--pumping system
-lasing medium
-optical cavity
Pumping System Correct Answer--source of power that excites the lasing medium in order
to create photons for the laser beam
-can be an electrical source, a flash lamp or another laser
Lasing Medium Correct Answer--what determines the wavelength of the system
-four types: solid state, gas, dye, and semiconductor
Optical Cavity Correct Answer--contains the lasing medium and reflective mirrors that
guide the laser beam
-provide amplification to create the desired laser parameters
LASER acronym Correct Answer-Light
, EXAM: Laser Safety Officer (AF)|133 Questions
with Verified Solutions
Amplification by
Stimulated
Emission of
Radiation
Beam Characteristics Correct Answer--monochromatic
-coherent
-collimated
Monochromatic Correct Answer--light emitted by a laser is almost pure in color of a single
wavelength
Coherent Correct Answer--measure of the degree of phase correlation that exists in the
radiation field of a light source at different locations and different times
-waves are tightly in phase or in step with one another
