Laser Power & Energy Sensors

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Laser Power & Energy Sensors

Sensors for Laser Power & Energy

• Thermal sensors

Laser Point manufactures different families of state-of-the-art detector heads for measurement of powers and energies of  all lasers, from UV to the Far Infrared, in any application  within the industrial, medical or scientific fields.
Those detectors can mate to a broad family of precise and sophisticated  monitors and electronics which include touchscreen displays, RS232 and USB interfaces and application softwares .

• A Unique Thermal Design

A head is substantially made of a sensor disk  and  a housing with its heat sink or cooling devices. Each of these assemblies are critical in view of the final performance of the system. Parameters like thermal stability, linearity, spatial uniformity, heat dissipation are calculated by Laser Point’s Engineers  and extensive thermal design modelling is adopted to predict the sensors’ behaviour and  achieve their highest reliability.
Laser Absorbers are another important chapter in the head design. They have to withstand high damage thresholds as a function of the wavelength of use. Laser Point adopts various types of radiation absorbers, deposited under the tightest specifications, to resist extreme thermal and mechanical stresses.

 

                                             

 • Thermal Sensors for Laser Power and Energy

Thermal methods of measuring power and energy are those in which radiant energy is absorbed and converted into heat, which generates a temperature rise in the absorber. The absorbed energy is  then measured through a function that takes into account the temperature gradient between the hot area ( where the laser strikes) and a cool area (where the generated  heat is dissipated). This measurement can be done by means of  thermocouples arrays (thermopile). The temperature difference will generate a voltage at the end of each single thermocouple and, if the array is duly distributed over the sensor’s surface, the resulting total voltage will be proportional to the incident power or energy.

A strong advantage of this approach is that there is no influence on the measurement from ambient temperature variations because the generated voltage depends on the temperature difference between the hot  and the cold areas .
To dissipate the generated heat, a thermal sensor must be placed within a housing  which, depending on the amount of heat to be driven away, can dissipate by simple convection, have electrical low voltage fans or can be water cooled.
The final shape and dimensions of the heads must be carefully designed to  maintain the sensor temperature within its working limits. 
Thermal detectors also have an intrinsic high degree of linear response at the increase of power levels (linearity); a compensation for  those minor drops in linearity that occur at the working extremes are, in general,  made by using thermistors. 

Linearity of Laser Point’s detectors, thanks to their optimised thermal design, is excellent:  the picture shows linearity of a non-compensated air cooled 600W head ( Mod A-600-D60-HPB) working up  to 850 W, compared against a NIST reference. It show only  a 3% drop at the extreme values, far above specifications.
 Another strong point in favour of thermal detectors is their almost non-dependence from laser beam size and position. In fact, since the generated heat all flows through the thermocouples, whether they are deposited on circles (radial thermopiles) or linearly, with the hot and cold areas facing each other (axial thermopiles) the total signal ( laser power) is given by the sum of contributions from all thermocouples.
The response time is determined the thermal resistances, the thermal capacities and, mostly, by the geometrical sizes of the sensor disks.  The intrinsic response times of  detectors are significantly reduced by appropriate acceleration algorithms in Laser Point’s monitors.

• Thermal Sensors for Laser Power and Beam Position

Laser Point family of products bearing the “QA (air cooled) – QW (water cooled)” suffix are position sensing thermopiles that, in addition to give the measure of laser power, display the position of the incident beam on the sensor disk.
They utilize a thermopile disk where the thermocouple array is split into four quadrants, allowing those heads to provide very accurate information on beam position ( 100 microns resolution)..
This type of detectors, particularly useful for non-visible beams, .are recommended for those applications that require the alignment of complex laboratory optical setups and the alignment of beam lines in industrial machinery.

   

 • Laser Power Probes 

Those products a grouped under two families, both belonging to the Fit line. They are sensors that use a technique of measuring the temperature dynamics throughout thermopiles developed by LaserPoint (Patented.) A dedicated algorithm converts data originating from the sensors into fast , repeatable and precise readings. Fit detectors have provided a series of breakthroughs in laser measurement: in fact, while still keeping the advantages of thermopile sensor heads (e.g. their use at any wavelength), they do not need water cooling even when working at several kilowatts. No other power probe on the market has ever been so repeatable and precise before . These laser power sensors give accurate power laser measurements up to 10KWina simple way and can be used in all those cases where the availability of cooling water is an issue or when quick, occasional checks of laser power are necessary are enough. Laser power probes, as standalone instruments ( Fit Series), are perfect for laser job shops or service engineers; the Fit-H series has been designed to be associated to an external electronics for integration into laser systems.

 









Select up to 5 items and then click here

Compare
Item No.
Image
Power Range
Max intermittent
Energy Range
Useful Aperture
Cooling
10-BB-D12-L
High Energy Density Laser Thermal Sensor
High Energy Density Laser Thermal Sensor
2mW-10W15W50mJ-10J12mmConvection
10-BB-D25
Pulsed Laser Thermal Sensor
Pulsed Laser Thermal Sensor
2mW-10W15W50mJ-10J25mmConvection
10-UVA-D25
Pulsed Laser Thermal Sensor
Pulsed Laser Thermal Sensor
2mW-10W15W50mJ-10J25mmConvection
10-UVC-D25
Pulsed Laser Thermal Sensor
Pulsed Laser Thermal Sensor
2mW-10W15W50mJ-10J25mmConvection
20-BB-D40
Pulsed Laser Thermal Sensor
Pulsed Laser Thermal Sensor
40mW-20W30W100mJ-20J40mmConvection
20-UVA-D40
Pulsed Laser Thermal Sensor
Pulsed Laser Thermal Sensor
40mW-20W30W100mJ-20J40mmConvection
20-UVC-D40
Pulsed Laser Thermal Sensor
Pulsed Laser Thermal Sensor
40mW-20W30W100mJ-20J40mmConvection
A-02-D12-BBF
Low Power (<40W) Thermal Sensor
Low Power (
0.1mW-200mW200mW1mJ-200mJ10mmConvection
A-10-D12-HPB
Low Power (<40W) Thermal Sensor
Low Power (
10mW-10W15W10mJ-15J12mmConvection
A-10-D20-BBF
Low Power (<40W) Thermal Sensor
Low Power (
10mW-10W15W10mJ-15J20mmConvection
A-10-D20-HPB
Low Power (<40W) Thermal Sensor
Low Power (
10mW-10W15W10mJ-15J20mmConvection
A-200-D25-HPB
Medium Power (200mW-600W) Thermal Sensor
Medium Power (200mW-600W) Thermal Sensor
0.2W-200W250W0.5J-250J25mmForced Air
A-200-D25-SHC
Medium Power (200mW-600W) Thermal Sensor
Medium Power (200mW-600W) Thermal Sensor
0.2W-200W250W0.5J-250J25mmForced Air
A-200-D40-EX
Medium Power (200mW-600W) Thermal Sensor
Medium Power (200mW-600W) Thermal Sensor
0.2W-200W250W0.5J-250J40mmForced Air
A-200-D40-HPB
Medium Power (200mW-600W) Thermal Sensor
Medium Power (200mW-600W) Thermal Sensor
0.2W-200W250W0.5J-250J40mmForced Air
A-200-D40-SHC
Medium Power (200mW-600W) Thermal Sensor
Medium Power (200mW-600W) Thermal Sensor
0.2W-200W250W0.5J-250J40mmForced Air
A-200-D60-EX
Medium Power (200mW-600W) Thermal Sensor
Medium Power (200mW-600W) Thermal Sensor
0.3W-200W250W1J-250J60mmForced Air
A-200-D60-HPB
Medium Power (200mW-600W) Thermal Sensor
Medium Power (200mW-600W) Thermal Sensor
0.3W-200W250W1J-250J60mmForced Air
A-200-D60-SHC
Medium Power (200mW-600W) Thermal Sensor
Medium Power (200mW-600W) Thermal Sensor
0.3W-200W250W1J-250J60mmForced Air
A-2-D12-BBF
Low Power (<40W) Thermal Sensor
Low Power (
1mW-2W2W1mJ-2J10mmConvection
A-2-D12-HPB
Low Power (<40W) Thermal Sensor
Low Power (
1mW-2W2W1mJ-2J10mmConvection
A-300-D60-EX
Medium Power (200mW-600W) Thermal Sensor
Medium Power (200mW-600W) Thermal Sensor
0.5-300W400W1J-400J60mmForced Air
A-300-D60-HPB
Medium Power (200mW-600W) Thermal Sensor
Medium Power (200mW-600W) Thermal Sensor
0.5-300W400W1J-400J60mmForced Air
A-30-D12-SHC-L
High Energy Density Laser Thermal Sensor
High Energy Density Laser Thermal Sensor
20mW-30W45W100mJ-45J12mmConvection
A-30-D25-HPB
Low Power (<40W) Thermal Sensor
Low Power (
20mW-30W45W50mJ-45J25mmConvection
A-40/200-D25-HPB
Low Power (<40W) Thermal Sensor
Low Power (
150mW-40W200W200mJ-200J25mmConvection
A-40/200-D40-EX
Low Power (<40W) Thermal Sensor
Low Power (
100mW-40W200W150mJ-200J40mmConvection
A-40/200-D40-HPB
Low Power (<40W) Thermal Sensor
Low Power (
100mW-40W200W150mJ-200J40mmConvection
A-40/200-D60-EX
Low Power (<40W) Thermal Sensor
Low Power (
200mW-40W200W250mJ-200J60mmConvection
A-40/200-D60-HPB
Low Power (<40W) Thermal Sensor
Low Power (
200mW-40W200W250mJ-200J60mmConvection
A-40-D25-BBF
Low Power (<40W) Thermal Sensor
Low Power (
20mW-40W60W50mJ-60J25mmConvection
A-40-D25-EX
Low Power (<40W) Thermal Sensor
Low Power (
20mW-40W60W50mJ-60J25mmConvection
A-40-D25-HPB
Low Power (<40W) Thermal Sensor
Low Power (
20mW-40W60W50mJ-60J25mmConvection
A-40-D40-EX
Low Power (<40W) Thermal Sensor
Low Power (
20mW-40W60W50mJ-60J40mmConvection
A-40-D40-HPB
Low Power (<40W) Thermal Sensor
Low Power (
20mW-40W60W50mJ-60J40mmConvection
A-5-D12-BBF
Low Power (<40W) Thermal Sensor
Low Power (
10mW-5W7.5W10mJ-5J10mmConvection
A-600-D40-EX
Medium Power (200mW-600W) Thermal Sensor
Medium Power (200mW-600W) Thermal Sensor
0.5W-600W800W1J-800J40mmForced Air
A-600-D40-HPB
Medium Power (200mW-600W) Thermal Sensor
Medium Power (200mW-600W) Thermal Sensor
0.5W-600W800W1J-800J40mmForced Air
A-600-D60-SHC
Medium Power (200mW-600W) Thermal Sensor
Medium Power (200mW-600W) Thermal Sensor
0.5W-600W800W1J-800J60mmForced Air
Cronos-LP 5.0
Laser Power Probe
Handheld Laser Power Probes
100W-5kW55mmConvection
Cronos-LP1.5
Laser Power Probe
Handheld Laser Power Probes
30W-1500W40mmConvection
Cronos-LP10
Laser Power Probe
Handheld Laser Power Probes
200W-10kW65mmConvection
Fit-200
Laser Power Probe
Handheld Laser Power Probes
2W-200W20mmConvection
Fit-50
Laser Power Probe
Handheld Laser Power Probes
0.5W-50W20mmConvection
Fit-500
Laser Power Probe
Handheld Laser Power Probes
5W-500W25mmConvection
Fit-IPL-R
Laser Power Probe
Handheld Laser Power Probes
1W-100W3.5J-350J20x60mmConvection
PD-500-D9-VIS
Photodiode Power Sensor
Photodiode Power Sensors
100uW-500mW9.5mmConvection
PD-50-D9-IR
Photodiode Power Sensor
Photodiode Power Sensors
100uW-40mW9.5mmConvection
PD-50-D9-UV
Photodiode Power Sensor
Photodiode Power Sensors
10uW-50mW9.5mmConvection
PD-50-D9-VIS
Photodiode Power Sensor
Photodiode Power Sensors
10uW-50mW9.5mmConvection
QA-10-D20-BBF
Laser Power and Position
Laser Power and Position
10mW-10W15W20mmConvection
QA-10-D20-HPB
Laser Power and Position
Laser Power and Position
10mW-10W15W20mmConvection
QA-200-D40-HPB
Laser Power and Position
Laser Power and Position
1W-200W250W40mmForced Air
QA-200-D40-SHC
Laser Power and Position
Laser Power and Position
1W-200W250W40mmForced Air
QA-40-D25-BBF
Laser Power and Position
Laser Power and Position
100mW-40W60W25mmConvection
QA-40-D25-HPB
Laser Power and Position
Laser Power and Position
100mW-40W60W25mmConvection
QA-40-D40-HPB
Laser Power and Position
Laser Power and Position
100mW-40W60W40mmConvection
QW-1500-D40-HPB
Laser Power and Position
Laser Power and Position
10W-1500W2250W40mmWater
QW-1500-D40-SHC
Laser Power and Position
Laser Power and Position
10W-1500W2250W40mmWater
QW-3000-D55-HPB
Laser Power and Position
Laser Power and Position
20W-3000W4500W55mmWater
QW-3000-D55-SHC
Laser Power and Position
Laser Power and Position
20W-3000W4500W55mmWater
QW-6000-D55-SHC
Laser Power and Position
Laser Power and Position
30W-6000W9000W55mmWater
W-1500-D40-HPB
High Power (2W-6 kW) Thermal Sensor
High Power (2W-6 kW) Thermal Sensor
4W-1500W2250W5J-2500J40mmWater
W-1500-D40-SHC
High Power (2W-6 kW) Thermal Sensor
High Power (2W-6 kW) Thermal Sensor
4W-1500W2250W5J-2500J40mmWater
W-200-D40-HPB
Medium Power (200mW-600W) Thermal Sensor
Medium Power (200mW-600W) Thermal Sensor
0.2W-200W300W1J-300J40mmWater
W-200-D40-SHC
Medium Power (200mW-600W) Thermal Sensor
Medium Power (200mW-600W) Thermal Sensor
0.2W-200W300W1J-300J40mmWater
W-3000-D55-HPB
High Power (2W-6 kW) Thermal Sensor
High Power (2W-6 kW) Thermal Sensor
6W-3kW4.5kWn/a55mmWater
W-3000-D55-SHC
High Power (2W-6 kW) Thermal Sensor
High Power (2W-6 kW) Thermal Sensor
6W-3kW4.5kWn/a55mmWater
W-500-D70-SHC
Medium Power (200mW-600W) Thermal Sensor
Medium Power (200mW-600W) Thermal Sensor
0.5W-500W700W1J-700J70mmWater
W-6000-D55-SHC
High Power (2W-6 kW) Thermal Sensor
High Power (2W-6 kW) Thermal Sensor
15W-6kW9kWn/a55mmWater
W-600-D30-HPB
Medium Power (200mW-600W) Thermal Sensor
Medium Power (200mW-600W) Thermal Sensor
0.5W-600W800W1J-800J30mmWater
W-600-D30-SHC
Medium Power (200mW-600W) Thermal Sensor
Medium Power (200mW-600W) Thermal Sensor
0.5W-600W800W1J-800J30mmWater
OUR BLOG

GOA Optical Amplifiers
03.21.2017

Click here for more information on GOA Optical Amplifiers!

Testimonials

Your lasers are working very well so far. We don´t need to adjust the laser temperature any more, only the current a little bit which is easy, so we save considerable time in our QC department. We had no failure yet.

Laser Engineer, ,