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PF - volume absorber for short pulses and high average powers
HE/HE1- volume absorber for high energy pulses
EX - Excimer type, volume absorber
PE - pyroelectric metallic or black absorber
BB - broadband surface absorber, high power density
LP1 - broadband surface absorber for highest power density
BF - very high damage threshold, long pulses
FS - Fused silica window close to detector for divergent beams
Note:
For more detailed and exact specifications, see the
latest Ophir Laser Measurement Instruments Catalog.
Absorber
Type
P
HE/HE1
BB
LP1
EX
PE, Metallic
PE, BB
PE-DIF
PE BB-DIF
Max Energy Density J/cm²
Pulse Length
10ns
1µs
300µs
10
10
10
3
5
15
0.3
0.5
3
0.09
0.5
10
0.8
0.9
7
0.2
0.5
4
0.5
0.5
1
1
2
20
3
3
10
Table 6
Maximum Energy Densities for Various Absorbers
(Single pulse).
Graph 4.
Pulsed Laser Damage Threshold for Thermal Sensors
110