Laser Energy Sensors

Ophir has two types of energy sensors, pyroelectric and photodiode. Pyroelectric sensors are for measuring repetitive pulse energies and average powers at pulse rates up to 25000 pulses per second and pulse widths up to 20 ms. Photodiode energy sensors are for very low energy pulsed lasers, as low as 200 pJ. Note that single shot energy with pulse rates less than one pulse every 5 s or so can be measured with thermal sensors.

Photodiode Energy Sensors

Ophir photodiode laser energy sensors are able to measure low energy pulses down to 10pJ at frequencies up to 20 kHz. Silicon photodiodes for the UV and visible spectrum and Germanium photodiodes for infrared.
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Laser Pyroelectric Energy Sensors

Pyroelectric sensors for measuring repetitively pulsed energy at up to 25 kHz. These sensors use a pyroelectric crystal that generates an electric charge proportional to the heat absorbed. The response time of the pyroelectric sensor depends on the time it takes for the heat to enter the crystal and heat it up. For metallic type pyro detectors, this time is tens of μs and thus the metallic type can run at a high repetition rate. For the BF and BB type, the response time is milliseconds with a correspondingly lower repetition rate.
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Energy Sensors for IPL Sources

Ophir has several ways to measure intense pulsed light IPL radiation used in cosmetic treatments. The light from these sources is broadband and usually has a high divergence. Furthermore, the light source is often coupled to the skin via an index matching gel. For these reasons, we need special solutions to accurately measure the energy of the IPL pulses.
There are 3 Ophir products suited for these measurements;

- L40(150)A-IPL tailored for gel coupled sources
- L50(300)A-LP2-65 tailored for air coupled sources
- L50(300A-IPL for both air and gel coupled sources
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