基于带有光热涂层的游标增强法布里-珀罗干涉仪的光电探测器。

Photodetector based on Vernier-Enhanced Fabry-Perot Interferometers with a Photo-Thermal Coating.

机构信息

Laser Physics and Photonic Devices Laboratories, School of Engineering, University of South Australia, Mawson Lakes, South Australia 5095, Australia.

Future Industries Institute, University of South Australia, Mawson Lakes, South Australia 5095, Australia.

出版信息

Sci Rep. 2017 Jan 31;7:41895. doi: 10.1038/srep41895.

DOI:10.1038/srep41895

PMID:28139745

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5282560/

Abstract

We present a new type of fiber-coupled photodetector with a thermal-based optical sensor head, which enables it to operate even in the presence of strong electro-magnetic interference and in electrically sensitive environments. The optical sensor head consists of three cascaded Fabry-Perot interferometers. The end-face surface is coated with copper-oxide micro-particles embedded in hydrogel, which is a new photo-thermal coating that can be readily coated on many different surfaces. Under irradiation, photons are absorbed by the photo-thermal coating, and are converted into heat, changing the optical path length of the probing light and induces a resonant wavelength shift. For white-light irradiation, the photodetector exhibits a power sensitivity of 760 pm/mW, a power detection limit of 16.4 μW (i.e. specific detectivity of 2.2 × 10 cm.√Hz/W), and an optical damage threshold of ~~100 mW or ~800 mW/cm. The response and recovery times are 3.0 s (~~90% of change within 100 ms) and 16.0 s respectively.

摘要

我们提出了一种新型的光纤耦合光电探测器，它具有基于热的光学传感器头，即使在存在强电磁干扰和电敏感环境的情况下，它也能正常工作。光学传感器头由三个级联的法布里-珀罗干涉仪组成。端面表面涂有铜氧化物微粒子嵌入水凝胶中，这是一种新的光热涂层，可以很容易地涂覆在许多不同的表面上。在辐照下，光子被光热涂层吸收，并转化为热量，从而改变探测光的光程长度，并引起共振波长移动。对于白光辐照，光电探测器表现出 760 pm/mW 的功率灵敏度、16.4 μW 的功率检测极限（即特定探测率为 2.2×10 cm.√Hz/W）和~~100 mW 或~~800 mW/cm 的光学损伤阈值。响应和恢复时间分别为 3.0 s（~100 ms 内 90%的变化）和 16.0 s。