Broadband 35 W Thermopile Sensor with 50 mm Aperture
Broadband 35 W Thermopile Sensor with 50 mm Aperture
The L40(250)A-BB-50 thermopile sensor is a general purpose laser power and energy thermal sensor with a 50 mm aperture. It can measure optical power from 300 mW to 35 W continuously and to 250 W intermittently. It can measure energy from 100 mJ to 4000 J. It has the spectrally flat broadband BB coating and covers the spectral range from 0.19 to 11 µm.
- Broadband 0.19 to 11 µm absorber
- 300 mW to 35 W average power measurement
- 100 mJ to 4000 J pulse energy measurement
- 250 W power measurement intermittently See All Features
Features
Measuring Kilowatt Laser Beams with 50W Sensors
For measuring high average powers, you may not need to use a high average power, water-cooled, big and heavy sensor. This video shows you three practical solutions to “get away” with using lower power sensors to measure high power beams, using short exposure times.
Choosing a Thermal Sensor
In this short “Basics” video we review the use – and selection - of thermal sensors for measuring low, medium and high laser powers.
Sensors for Measuring Laser Power
In this short "Basics" video we review in general how one goes about measuring laser beam power, so that you'll have a clear understanding of what the different sensor types are, and when to use each type.
Thermal Power Sensor Accuracy
Ophir former CTO Dr. Ephraim Greenfield discusses the various factors that contribute to uncertainties in measurement when using Ophir laser power and energy meters.
Thermal Sensor Calibration
As the spectral sensitivity of the absorber used for the power and energy measurement is not fully linear, Ophir sensors get a high precision calibration by default with more than one wavelength.
Each thermal sensor is calibrated independently of a particular Ophir power meter with its calibration information contained in the DB15 plug. When the sensor is connected to the meter, the meter reads and interprets this information to display a calibrated reading. Each power meter is calibrated independently and has the same sensitivity as an other meter within about 2 tenths of a percent.
Unless otherwise indicated, Ophir sensors and meters should be recalibrated within 18 months after initial purchase, and then once a year after that.
Accessories
Fiber Connector Adapters
Fiber Adapter Mounting Bracket
Thermal Sensor Cables
Sensor Connector to BNC Adapter
Resources
Data Sheets
Catalogs
Power Sensors Catalog(11.2 MB, PDF) Laser Power & Energy Measurement and Laser Beam Analysis Catalog(27.5 MB, PDF)
Drawings & CAD
L40(250)A-BB-50 Drawing(122.2 kB, PDF)
Technical Notes
Absorption, Angle Dependence and Damage Graphs for Thermal Sensors(216.1 kB, PDF) 5 Situations Where Laser Performance Measurement is Necessary Effect of Ambient Conditions on Laser Measurements How do I know what range, or scale, to set my power/energy meter to? Setting Your Thermal Sensor up in Energy Mode for the Best Accuracy and Repeatability How Much of the Power Sensor Aperture Can My Laser Fill Up? How to Properly Select a Laser Power or Energy Sensor Common Reasons for Thermal Sensor Damage or Out of Tolerance Conditions
