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MKS Instruments has introduced new line of high damage threshold laser power/energy sensors designed for CW lasers with high power densities, as well as long as for pulse lasers. The Ophir 1000W-LP2-34, L1500WLP2-50, 5000W-LP2-50, and FL600A-LP2-65 feature a new LP2 coating that provides the highest damage threshold in the industry, 10 kW/cm2 at 1 kW power. The coating also reduces reflection by absorbing almost 95% at most wavelengths and is totally spectrally flat ±1% from 0.2 µm to 1.1 µm.
The Ophir LP2 sensors cover a wide spectral range, from 0.35 – 2.2 µm. In addition:
- The 1000W-LP2-34 has a 34 mm aperture and can measure power from 5 W to 1000 W and energy from 400mJ to 300J. Maximum average powerdensity is 20 kW/cm2 at 500 W and 10 kW/cm2 at 1000 W.
- The L1500W-LP2-50 has a 50 mm aperture and can measure power from 15 W to 1500 W and energy from 500 mJ to 200 J. Maximum average power density is 10 kW/cm2 at 1000 W and 5.5 kW/cm2 at 1500 W.
- The 5000W-LP2-50 has a 50 mm aperture and can measure power from 20 W to 5000 W. Maximum average power density is 20 kW/cm2 at 500 W and 5 kW/cm2 at 3000 W and 2.5 kW/cm2 at 5000 W.
- The FL600A-LP2-65 has a 65 mm aperture and can measure power from 500 mW to 600 W and energy from 600 mJ to 600 J. Maximum average power density is 33 kW/cm2 at 150 W and 11 kW/cm2 at 600 W.
The new LP2 coating offers very high absorption, which reduces dangerous and often harmfulmback reflection. The coating also provides very low dependence on beam angle, allowing the sensors to measure divergent high power lasers, such as diode laser bars, as well as collimated beams.
The 1000W-LP2-34 sensor is designed so that the only materials in contact with the cooling water are either copper or nonmetallic. This eliminates the possibility of contaminating the water or corroding the sensor, improving the accuracy and reliability of the measurements. All Ophir thermal sensors feature a “Smart Connector” interface that operates with the company’s StarBright, Vega, Nova II, and StarLite smart displays, and Juno compact USB PC interface. The display is automatically configured and calibrated when plugged into one of the company’s laser measurement heads.