Pyroelectric PVDF sensor modeling of the temporal voltage response to arbitrarily modulated radiation

Abstract

Our design of transducer arrays for custom pyroelectric sensors is mainly devoted to IR laser beam characterization and control. It benefits from some of the properties of PVDF film such as low cost, low weight, mechanical flexibility, chemical stability (inert), and compatibility of thick film interconnection technologies on metallized films. By using the temporal characteristics of the source intensity and starting from a standard equivalent one-dimensional model of a multilayer thick-film transducer in the frequency domain, we developed a computer model of the PVDF sensor that determines the temporal response to arbitrarily modulated radiation. The validation of the model accuracy has been carried out with a simulation procedure performed on a PVDF sensor designed for accurate beam alignment of low power laser beams. In this case, an iterative algorithm also was developed to estimate some thermal and physical properties of the front absorbing and the metallization layers that are generally barely known. We present a fitting procedure to determine these properties by using the temporal pyroelectric response to a square wave modulated laser diode that provides a reliable reference signal.

Laser Pulses Characterization with Pyroelectric Sensors

“…The usefulness of sensor and preamplifier modeling with electronic CAD programs is the possibility of calculating the current or voltage responsivity function for a given shape of the laser pulse. According to this approach (Capineri et al , 2000), a temporal and frequency analysis of arbitrary modulated laser intensity have been demonstrated possible. The experimental detector pulse time response of 24 μs to a simulated 17 μs rising edge of a Nd-YAG laser pulse is shown in Figure 7.…”

Laser Pulse Phenomena and Applications

“…The usefulness of sensor and preamplifier modeling with electronic CAD programs is the possibility of calculating the current or voltage responsivity function for a given shape of the laser pulse. According to this approach (Capineri et al , 2000), a temporal and frequency analysis of arbitrary modulated laser intensity have been demonstrated possible. The www.intechopen.com experimental detector pulse time response of 24 μs to a simulated 17 μs rising edge of a Nd-YAG laser pulse is shown in Figure 7.…”

Pyroelectric Properties of the B-Polyvilnylidene Fluoride (PVDF) Thin Film Prepared by Vacuum Deposition with Electric Field Application

“…Studies on the pyroelectic properties of PVDF film have been reported recently. [11][12][13] Various methods available for preparing the PVDF thin film are such as the sol-gel method, and injection molding. The PVDF films prepared by these methods are about 20 µm thick.…”