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Thermal Laser Power Sensor, BB Type, 0.1-11 kW, Ø45 mm, 800-2000 nm, Water-Cooled


  • Product Name
  • Absorber Type
    BB - Broadband general purpose
  • Aperture Size
    Ø45 mm
  • Spectral Range
    800-2000 nm and 10.6 µm
  • Minimum Power
    100 W
  • Maximum Average Power
    11 kW
  • Backscattered Power
    ~3.5% without Scatter Shield
    ~1% with Scatter Shield
  • Response Time
    2.7 s
  • Maximum Average Power Density
    10 kW/cm²
  • Cooling
  • Dimensions
    Ø146 x 70 mm
  • Cable Length
    5 m
  • CE Compliance
  • UKCA Compliance
  • China RoHS Compliance


Scatter Shields: Reducing Back-Reflected Power from High Power Sensors

When measuring very high power laser beams, even the few percent of the beam normally back-scattered from the sensor can be a problem. Ophir now offers Scatter Shields as accessories for our high power laser sensors. These can be mounted on the front flange of the sensors to reduce the backscatter by about 70%.

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.

Measuring Very High Power Laser Beams

Laser beams with powers of many tens of Kilowatts are becoming more and more common in today's applications, industrial as well as research. This video will discuss the technical challenges in measuring such lasers, and will show you a range of solutions now available from Ophir for measuring up to 100KW -- safely, and accurately.

Water Cooled Sensors: Things to Look Out For

Water cooled sensors are commonly used when measuring laser beams of more than a few hundred watts. In this video, you will learn about some critical issues you need to consider when using water cooling, such as water temperature, water flow rate, and corrosion prevention.

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.

Absorption of different thermal sensor absorber types
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