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max. Impulsle power density & Absorption(%)

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Pyroelectric Detectors Series PEM K
with ceramic absorption coating for high energy densities


Main applications for this detector are pulse lasers with high power density (Excimer-, CO2-,TEA-, Nd-YAG-Laser). With this device we offer a sensor that serves in a wide range of applications due to a high damage threshold, a short time constant, relatively high sensitivity and high aperture.


A special feature is this detector's switch on the housing's backside allowing a choice between high sensitivity or a short time constant.


PEM 20 K
PEM 45 K
Apertur
20 mm
45 mm
sensitivity at 1 MOhm 10 .. 15 V/J
1.5 .. 3.5 V/J
sensitivity at 100 kOhm
--
0.5 .. 1.5 V/J
max. repetition rate
30 Hz
30 Hz at 1 MOhm
50 Hz at 100 kOhm
max. average power
5 W
10 W
detection threshold
100 µJ
1 mJ
accuracy ±5 % ±5 %
connector BNC
BNC
dimensions
(diameter x length)
46 mm x 47 mm
68 mm x  53 mm


zulässige Leistungs- und Energiedichten, an verschiedenen Lasern ermittelt:
Laser
Pulsleistungsdichte
Energiedichte
Excimer, 308 nm, 20ns
50 MW/cm²
1 J/cm²
Nd:YAG, THG, 355 nm, 7 ns
65 MW/cm²450 mJ/cm²
Nd:YAG, SHG, 512 nm, 8 ns70 MW/cm²560 mJ/cm²
Nd:YAG, 1064 nm, 8 ns120 MW/cm²970 mJ/cm²
CO2-TEA, 10,6 µm, 500 ns
10 MW/cm²5 J/cm²