11QE50 laser energy detectors can measure energy up to 85 J (with attenuator), max repetition frequency - 4000 Hz. Low noise level - just 10 µJ. Effective aperture - 50 mm square. These detectors are convenient to use and can measure relatively wide beams. They are suitable for many OEM, manufacturing and laboratory applications. Specifications
| Detector |
11QE50LP-S-MB |
11QE50LP-H-MB |
11QE50SP-S-MT |
11QE50SP-H-MT |
| MAX MEASURABLE ENERGY (WITH ATTENUATOR) |
85 J |
85 J |
44 J |
44 J |
| MAX REPETITION FREQUENCY |
200 Hz |
200 Hz |
4000 Hz |
4000 Hz |
| EFFECTIVE APERTURE |
50 x 50 mm |
50 x 50 mm |
50 x 50 mm |
50 x 50 mm |
| MEASUREMENT CAPABILITY |
| Spectral Range *a |
0.19 – 20 µm |
0.19 – 20 µm |
0.19 – 20 µm b |
0.19 – 20 µm b |
| Maximum Measurable Energy c |
Alone |
Attenuator |
Alone |
Attenuator |
Alone |
Attenuator |
Alone |
Attenuator |
| 1064 nm, 7 ns, 10 Hz d |
15 J |
85 J |
15 J |
85 J |
13 J |
44 J |
13 J |
44 J |
| 266 nm, 7 ns, 10 Hz |
12.5 J |
22 J |
12.5 J |
22 J |
1.8 J |
6.5 J |
1.8 J |
6.5 J |
| Noise Equivalent Energy e |
10 µJ |
10 µJ |
10 µJ |
10 µJ |
| Sensitivity f,g |
3 V/J |
3 V/J |
4 V/J |
4 V/J |
| Max Repetition Frequency |
200 Hz |
200 Hz |
4000 Hz |
4000 Hz |
| Maximum Pulse Width (typical) |
675 µs ** |
675 µs ** |
10 µs |
10 µs |
| Rise Time (typical 0-100 %) |
900 µs |
900 µs |
20 µs |
20 µs |
| Calibration Uncertainty h |
±3 % |
±3 % |
±3 % |
±3 % |
| Repeatability |
<0.5 % |
<0.5 % |
<0.5 % |
<0.5 % |
| DAMAGE THRESHOLDS |
| Maximum Average Power |
Alone |
Attenuator |
Alone |
Attenuator |
Alone |
Attenuator |
Alone |
Attenuator |
| All Wavelengths |
10 W |
25 W |
20 W |
45 W |
10 W |
25 W |
20 W |
45 W |
| Maximum Energy Density |
Alone |
Attenuator |
Alone |
Attenuator |
Alone |
Attenuator |
Alone |
Attenuator |
| 1064 nm, 7 ns, single shot |
0.6 J/cm2 |
16 J/cm2 |
0.6 J/cm2 |
16 J/cm2 |
0.50 J/cm2 |
4 J/cm2 |
0.50 J/cm2 |
4 J/cm2 |
| 1064 nm, 7 ns, 10 Hz |
0.6 J/cm2 |
8 J/cm2 |
0.6 J/cm2 |
8 J/cm2 |
0.50 J/cm2 |
2 J/cm2 |
0.50 J/cm2 |
2 J/cm2 |
| 532 nm, 7 ns, 10 Hz |
0.6 J/cm2 |
6 J/cm2 |
0.6 J/cm2 |
6 J/cm2 |
0.07 J/cm2 |
0.35 J/cm2 |
0.07 J/cm2 |
0.35 J/cm2 |
| 266 nm, 7 ns, 10 Hz |
0.5 J/cm2 |
1 J/cm2 |
0.5 J/cm2 |
1 J/cm2 |
0.07 J/cm2 |
0.30 J/cm2 |
0.07 J/cm2 |
0.30 J/cm2 |
| Maximum Average Power Density |
10 W/cm2 |
600 W/cm2 |
10 W/cm2 i |
600 W/cm2 |
10 W/cm2 |
600 W/cm2 |
10 W/cm2 i |
600 W/cm2 |
| PHYSICAL CHARACTERISTICS |
| Effective Aperture (with Attenuator) |
50 X 50 mm (47 X 47 mm) |
| Absorber |
Multi-Band |
Multi-Band |
Metallic |
Metallic |
| Dimensions |
75H x 75W x 15D mm |
75H x 75W x 44D mm |
75H x 75W x 15D mm |
75H x 75W x 44D mm |
| Weight |
209 g |
338 g |
209 g |
338 g | Specifications are subject to change without notice
* For the calibrated spectral range, see the user manual.
** Also available on special order: The Extra Long Pulse Series 11QE50ELP-MB for pulse widths up to 4 msec, custom-tuned for rep. rate, sensitivity, and pulse width.
a. 0.308 - 2.1 µm with QED Attenuator.
b. Detectors with the MT coating can be used within the range 0.19 to 20 µm, however the absorption in the IR wavelengths decreases significantly. This, in turn, reduces the sensitivity and increases the noise level. Nevertheless, each detector is individually scanned and the wavelength correction factor (PWC) is NIST traceable in the range of 248 nm to 2.5 µm.
c. Not exceeding Maximum Average Power.
d. Increasing pulse width increases the maximum measurable energy.
e. Nominal value, actual value depends on electrical noise in the measurement system.
f. Load: 1 M&Omh; and ≤ 30 pF.
g. Maximum output voltage = sensitivity x maximum energy.
h. Excludes non-linearities.
i. At 10 W. Maximum Average Power Density is 5 W/cm2 @ 20 W for -H versions.
More information about QED attenuators
Compatible Monitors:
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