How Do Pyroelectric Sensors Work?

As we previously discussed, pyroelectric sensors are commonly used to measure lasers with repetitively pulsed beams, where capturing every pulse is essential. Discover how pyroelectric sensors, with their ability to capture every laser pulse, are revolutionizing laser measurement—offering enhanced precision and flexibility in demanding applications.

What Do Pyroelectric Sensors Measures?

These sensors are capable of measuring repetitive pulsed energies and average powers at pulse rates up to 25,000 pulses per second, with pulse widths as long as 20 milliseconds. However, it’s important to note that pyroelectric sensors are somewhat less durable than thermal sensors. If you don’t need to measure the energy of each pulse and measuring average power is sufficient, then a power sensor rather than an energy sensor might be the right choice.

How Do Pyroelectric Sensors Work?

Pyroelectric sensors are constructed from pyroelectric crystals that generate an electric charge proportional to the heat absorbed from the laser pulse. This charge is then collected, and the voltage difference is measured. Once the energy is read by the electronic circuit, the charge on the crystal is discharged, preparing it for the next pulse.

The Advantage of Ophir’s Pyroelectric Sensors

Ophir’s pyroelectric detectors are equipped with unique circuitry that allows them to measure both long and short pulses, even when the pulse width is as much as 30% of the total cycle time.

Our new compact C line of pyroelectric sensors is a significant upgrade from earlier models. They are not only more compact, but they also offer a wider dynamic range, can handle higher pulse repetition rates, and are capable of measuring longer pulses.

With these improvements, the C line of sensors represents a substantial leap forward in the capabilities and versatility of pyroelectric sensors for laser measurement. Whether you’re dealing with short or long pulses, these sensors are designed to help you achieve precise measurements in demanding environments.