Small Ward, Buckley Patrick R, Wilson Thomas S, Loge Jeffrey M, Maitland Kristen D, Maitland Duncan J
Lawrence Livermore National Laboratory, 7000 East Avenue, L-211, Livermore, California 94550, USA.
J Biomed Opt. 2008 Mar-Apr;13(2):024018. doi: 10.1117/1.2904952.
We developed a technique for constructing light diffusing devices comprised of a flexible shape memory polymer (SMP) cylindrical diffuser attached to the tip of an optical fiber. The devices are fabricated by casting an SMP rod over the cleaved tip of an optical fiber and media blasting the SMP rod to create a light diffusing surface. The axial and polar emission profiles and circumferential (azimuthal) uniformity are characterized for various blasting pressures, nozzle-to-sample distances, and nozzle translation speeds. The diffusers are generally strongly forward-directed and consistently withstand over 8 W of incident IR laser light without suffering damage when immersed in water. These devices are suitable for various endoluminal and interstitial biomedical applications.
我们开发了一种构建光扩散装置的技术,该装置由附着在光纤尖端的柔性形状记忆聚合物(SMP)圆柱形扩散器组成。这些装置是通过将SMP棒浇铸在光纤的劈开尖端上,并对SMP棒进行介质喷砂处理以形成光扩散表面来制造的。针对各种喷砂压力、喷嘴与样品的距离以及喷嘴平移速度,对轴向和极向发射轮廓以及圆周(方位角)均匀性进行了表征。这些扩散器通常具有很强的向前指向性,并且当浸入水中时,能够持续承受超过8W的入射红外激光而不损坏。这些装置适用于各种腔内和组织间生物医学应用。