Dynamics of the photoacoustic response of single-element PZT transducers to pulse burst excitation

Cherkashin, Maxim; Brenner, Carsten; Putro, Widodo D.; Döpke, Benjamin; Gerhardt, Nils C.; Hofmann, Martin R.

doi:10.1117/12.2253051

Cited by 2 publications

(2 citation statements)

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“…22 It is nonlinearly dependent on the interpulse delay time and in the limit of small t R it might cover the transducer resonance. On the other hand, in the absence of the resonant effects, the signals of individual pulses U sp ðtÞ arriving at the transducer with various interpulse delay times shall add linearly 16,17,23,24 E Q -T A R G E T ; t e m p : i n t r a l i n k -; e 0 0 1 ; 3 2 6 ; 4 5 2…”

Section: Journal Of Biomedical Opticsmentioning

confidence: 99%

“…Two illumination configurations are built as follows: (A) 905 nm DL (Laser Components), with driver LDP-V50-100V3 and CU PLCS-21, coupled into 600-μm core MMF, providing 1.2-μJ pulses of 12-ns length 25 and (B) custom-build laser diode bar 652 nm (Ferdinand-Braun Institute), with beam transformation optics (BTS series, LIMO), supplied with LDP-V-240-100 and PLCS-20, coupled into 550-μm core MMF, providing 1.1-μJ pulses of 31-ns length. 23,24 DL drivers (LDP-V*) and CUs (PLCS*) are from PicoLAS.…”

Section: Experimental Arrangementmentioning

confidence: 99%

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Transducer-matched multipulse excitation for signal-to-noise ratio improvement in diode laser-based photoacoustic systems

2019

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We analyze transducer-matched multipulse excitation as a method for improving of the signal-tonoise ratio (SNR) for diode laser-based photoacoustic systems. We discuss the principle of the technique, its advantages, and potential drawbacks and perform measurements to analyze the obtainable SNR increase. We show in experiment and computationally that a lower boundary estimate of 1.2 to 1.8 fold SNR improvement can be provided using transducer-matched pulse bursts, depending on the transducer and particular arrangement. Finally, we analyze implications that the transducer resonance effects may have on the recently introduced advanced photoacoustic techniques. The findings are of immediate interest to modalities utilizing dense pulse sequences and systems possessing limited pulse energy. In particular, transducer-matched multipulse excitation may be beneficial for diode-based photoacoustic systems operated with transducers in the range of 1 to 5 MHz since the required hardware is readily available.

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