Cuando-Espitia Natanael, Sánchez-Arévalo Francisco, Hernández-Cordero Juan
Department of Mechanical Engineering, University of California Riverside, Riverside, CA 92521, USA.
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, A.P. 70-360, Cd. Universitaria, México D.F. 04510, México.
Biomed Opt Express. 2018 Jul 5;9(8):3523-3533. doi: 10.1364/BOE.9.003523. eCollection 2018 Aug 1.
We demonstrate random laser (RL) emission from within bovine pericardium (BP) tissue. The interest in BP relies on its wide use as a valve replacement and as a biological patch. By imaging the emitting tissue, we show that RL emission is mostly generated inside the collagen fibers. Multimode RL operation is thus achieved within the volume of each fiber. Image analysis reveals that the intensity of the RL emission from individual fibers is dependent on the relative orientation to the stress axis. Our results suggest that RL intensity may be used as an indicator of stress concentration in individual fibers.
我们展示了牛心包（BP）组织内的随机激光（RL）发射。对BP的关注源于其作为瓣膜置换材料和生物补片的广泛应用。通过对发射组织进行成像，我们表明RL发射主要在胶原纤维内部产生。因此，在每根纤维的体积内实现了多模RL运作。图像分析表明，来自单个纤维的RL发射强度取决于与应力轴的相对取向。我们的结果表明，RL强度可用作单个纤维中应力集中的指标。
