CORK Optical Telemetry System

PI要求提供资金，以建造、测试和部署为装有仪器的海底钻孔观测站设计的光学遥测系统。在东北太平洋Juan de Fuca海脊侧翼钻的一系列井眼已安装仪器，作为ODP COCK方案的一部分，并定期进行访问，以下载数据和收集地下流体的物理样品。这种安装的基础设施为在相对受控的条件下安装和测试光通信节点提供了独特的机会。软木钻孔监测揭示了一个非常宽的信号，从潮汐负荷和海浪到海洋活动。目前的数据速率受到几个因素的限制，但通信速率是最具约束力的。需要更高的采样率来适当地采样包括海啸和其他海洋现象的高频信号。高速水下光通信将消除这一瓶颈，使海底仪器能够以科学相关的数据速率收集数据。 拟议的CORK-OTS将简单地插入CORK上现有的水下连接器，并将提供额外的能力，如数据存储和快速数据检索的能力，通过潜水器的定期访问，或者更重要的是通过使用由电缆从海面降下的光学接收器以远程模式进行。更广泛的影响拟议的工作是一项使能技术，将加强海洋学所有领域的研究和教育基础设施。PI计划与加拿大的国际合作伙伴太平洋地球科学中心以及其他大学的学术同事建立新的合作关系。此外，CORK-OTS可部署在地球仪周围的其他国际大洋钻探计划站点。在期刊和会议上公布拟议工作的结果将加强科学教育和技术。研究所还计划将拟议的研究工作纳入其教育活动，包括在夏季期间在其实验室雇用高中生和大学本科生。水下OTS的发展可能为政府和工业界将该技术商业化提供机会，用于环境监测和其他潜在应用。

The PIs request funding to build, test and deploy an optical telemetry system (OTS) designed for an instrumented seafloor borehole observatory. A series of boreholes drilled on the flanks of the Juan de Fuca ridge in the northeast Pacific have been instrumented as part of the ODP CORK program and are visited on a regular basis for downloading data and for collecting physical samples of subsurface fluids. This installed infrastructure provides a unique opportunity for installing and testing an optical communications node in relatively controlled conditions. CORK borehole monitoring reveals a very broadband signal from tidal loading and ocean waves to teleseismic activity. Present data rates are limited by several factors but communication rate is the most constraining. Greater sample rates are required to properly sample high frequency signals that include tsunamis and other oceanographic phenomena. Highspeed underwater optical communications will remove this bottle-neck and allow seafloor instruments to collect data at scientifically relevant data rates. The proposed CORK-OTS would simply plug into the existing underwater connectors on the CORK and would provide additional capability such as data storage and the ability for rapid data retrieval either by periodic visits by a submersible or perhaps more importantly in a remote-mode by using an optical receiver lowered by a cable from the sea surface. Broader ImpactsThe proposed work is an enabling technology that will enhance the infrastructure for research and education in all fields of oceanography. The PIs plan to establish new collaborations with an international partner in Canada, the Pacific Geoscience Center, and with academic colleagues at other universities. In addition, the CORK-OTS may be deployed at other International Ocean Drilling Program sites around the globe. The publication of the results of the proposed work in journals and conferences will enhance science education and technology. The PIs also plan to integrate the proposed research work in their educational activities, which include the hiring of high school students and college undergraduates during the summer periods in their laboratory. The development of the underwater OTS may offer opportunities for commercialization of the technology by government and industry for such use as environmental monitoring and other potential applications.