Document Type

Article

Publication Date

11-28-2016

Publication Title

Optics Express

ISSN

1094-4087

Volume

24

Issue

24

First Page

28122

Last Page

28130

DOI

https://doi.org/10.1364/OE.24.028122

PubMed ID

27906377

Abstract

Wave-front shaping techniques enable focusing and imaging through scattering media. Unfortunately, most approaches require invasive feedback inside or behind the sample, or use of spatial correlations (memory effect) limiting the application to specific types of samples. Recent approaches overcome these limitations by taking advantage of acoustic waves via the photoacoustic (PA) effect or via photon tagging. We present a fully analog signal processing lock-in scheme for PA detection to improve focusing through scattering media and to efficiently extract nonlinear photoacoustic signals towards wave-front optimization. Our implementation improves PA feedback performance in terms of SNR, speed, and resolution.

Share

COinS