# Laser-induced voltage of table salt for deep ultraviolet pulsed laser detection

## TL;DR

This paper shows that table salt can be used as a low-cost, fast material for detecting deep ultraviolet laser pulses.

## Contribution

The study introduces a novel, simple method for UV laser detection using table salt and a variable resistor.

## Key findings

- The laser-induced voltage response reflects the dynamics of laser-induced plasma.
- Reducing the resistor to 14.7 Ω decreased the response time to match the laser pulse duration.
- The logarithm of the voltage peak correlates linearly with laser energy.

## Abstract

To meet the requirements of fast response and simple process of deep ultraviolet (UV) pulsed laser detector, table salt (TS) was used as laser detection material in combination with a variable resistor to achieve single-pulse laser detection. Under the irradiation of a KrF excimer laser, the laser-induced voltage (LIV) of TS was influenced by the dynamic process of laser-induced plasma, and the whole process was well fitted with the sum of the three exponential functions. As the applied bias voltage (Vb) and incident laser energy (Ein) increased, the LIV amplitude (Vp) increased and the response time decreased. When the variable resistor (R) was reduced to 14.7 Ω, the response time of LIV decreased from ∼300 μs to ∼20 ns, which is the same as the duration of laser pulse. This research provided a simple, low-cost, and fast method for the detection of UV single-pulse laser based on the laser-TS interaction.

•Table salt (TS) can be used as a material for UV single-pulse laser detection•LIV response can characterize the dynamic process of laser-induced plasma•The impedance effect of LIV can monitor UV laser pulse in real-time•The logarithm of LIV peak is linearly correlated to laser energy

Table salt (TS) can be used as a material for UV single-pulse laser detection

LIV response can characterize the dynamic process of laser-induced plasma

The impedance effect of LIV can monitor UV laser pulse in real-time

The logarithm of LIV peak is linearly correlated to laser energy

Natural sciences; Physics; Applied sciences