Medium Power Large Aperture Thermal Sensors - Apertures to 65mm
300mW to 300W
Features
• Thin profile, very large aperture
• CW to 50W, intermittent to 300W
• Ø50mm to Ø65mm apertures For L50(250)A-BB-50:
• Pulse energies up to 4,000 Joules
• Measure high power lasers by 0.5-4s exposures
Description:
The L50(300)A-PF-65 is a thermal power/energy laser measurement sensor for high peak power pulsed lasers. It has a 65mm aperture and can measure from 400mW to 300W intermittently and to 50W continuously. It measures energy from 200mJ to 300J. It has a damage threshold of up to 3J/cm² for ns pulses and covers the spectral range from 0.15 to 20µm. The sensor comes with a standard 1.5 meter cable for connecting to a meter or PC interface.
Model
L50(250)A-BB-50
L50(300)A
L50(300)A-LP2-65
L50(300)A-PF-65
Use
General purpose
General purpose
Long pulse lasers
Large beam short pulsed lasers
Absorber Type
Broadband
Broadband
LP2
PF type
Spectral Range µm
0.19 - 20
0.19 - 20
0.25 - 2.2
0.15 - 20
Absorption
~88%
~88%
>94% from 0.25 to 1.1µm
~85%
Aperture mm
Ø50mm
Ø65mm
Ø65mm
Ø65mm
Power Mode
Power Range
300mW - 250W (a)
400mW - 300W
400mW - 300W
400mW - 300W
Maximum Intermittent Power
250W for 1.5min,
150W for 3min,
80W for 6min,
50W continuous (a)
300W for 2min,
150W for 4.5min,
50W continuous
Power Scales
250W / 30W
300W / 30W
300W / 30W
300W / 30W
Power Noise Level
15mW
20mW
20mW
20mW
Maximum Average Power Density kW/cm2
10 at 250W 17 at 50W
9.5 at 300W 17 at 50W
17 at 300W 50 at 50W
3
Response Time with Meter (0-95%) typ. s
2.5
3
3
3
Power Accuracy +/-%
3
3
3 (b)
4 (c)
Linearity with Power +/-%
1
1
1
1
Beam Size Dependence
<1% for beams up to 35mm diameter
NA
NA
NA
Energy Mode
Energy Range
100mJ - 4000J
200mJ - 300J
200mJ - 1000J
200mJ - 300J
Energy Scales
4kJ / 400J / 40J / 4J
300J / 60J / 6J
1000J / 600J / 60J / 6J
300J / 60J / 6J
Minimum Energy mJ
100
200
200
200
Maximum Energy Density J/cm2
Single (d) 10-50Hz (d)
<100ns
0.3
0.3
0.1
3 (e) 1.5
1µs
0.4
0.4
0.9
3 (e) 1.5
0.5ms
5
5
50
7 7
2ms
10
10
130
15 15
10ms
30
30
400
40 40
>300ms
See below (a), (f)
NA
NA
NA
Cooling
convection / ballistic
convection / ballistic
convection / ballistic
convection / ballistic
Fiber Adapters Available (see page 88)
ST, FC, SMA, SC
NA
NA
NA
Weight kg
0.6
0.9
0.9
0.9
Compliance
CE, China RoHS
CE, China RoHS
CE, China RoHS
CE, China RoHS
Version
Part number
7Z02796
7Z02658
7Z02782
7Z02743
Notes: (a) Long pulses (0.5 – 4s) can be used to measure power of high power lasers by measuring the energy of a short exposure. The StarBright, Juno, Juno+ and Centauri meters have a Pulsed Power mode where the user may specify the pulse width and get a reading directly in units of power for this short exposure energy measurement. See also page 75
Notes: (b) Above 1.1µm there is an additional calibration uncertainty of up to 2%
Notes: (c) Calibrated for 0.25 – 2µm, 10.6µm
Notes: (d) For 10-50Hz, derate as follows: Wavelength Derate to value 1064nm Not derated 532nm Not derated 355nm 70% of stated value 266nm 15% of stated value 193nm 10% of stated value
Notes: (e) Damage threshold 1.5J/cm2 for wavelengths <500nm
Notes: (f) Recommended exposure times and 1/e2 Gaussian beam diameters for very long pulses. Total energy for a series of measurements should not exceed 20kJ. Cooling down time before another 20kJ series, 10min. Recommended time between shots 12s.
Laser Power W
Recommended Exposure s
Number of shots before cooling down
Min 1/e² beam dia. mm
500
2
20
14
1000
1
20
14
2000
1
10
21
4000
1
5
32
5000
1
4
NA
10000
0.3
4
NA
商品属性 [功率范围] 400mW - 300W [波长范围] 0.15 - 20um