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The laser have also the advantage of being non-contact and totally remote. For example, Li et al. have proposed to induce surface acoustic waves by laser to measure elastic properties of biological thin layers like skin or cornea \cite{li2011elastic}, \cite{li2014laser}. Moreover, a laser probe can be made extremely small (smaller than 100 $\mu$m diameter if required), especially if optical fibres are employed, which can be inserted in small intima or vessels for example. Additionally, the shear wave source emits very weak electromagnetic noise (apart from the laser device itself), so it can be quite convenient for magnetic resonance elastography measurements, which are currently using external drivers or non-magnetic ultrasound probes. Moreover, the laser probe could help to shape precisely the shear wave shape, with focusing capabilities for example (see for example \cite{noroy1993laser}).  In summary, this study presented observation of elastic shear waves generated in soft tissues using a laser beam. The involved phenomenon was investigated. Experiments in chicken breast sample showed the feasibility of an the  elastography method using a laser beam as a shear wave source. The authors would like to thank Damien Garcia for lending the laser device. Pol Grasland-Mongrain received a FRM SPE20140129460 post-doctoral grant. The authors declare no conflict of interest in the work presented here.   
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