Embedded Deep-Sea Fiber Optic Distributed Temperature Sensing Systems for Long-Term Ocean Observatory and UUV-Based Applications
Abstract
Embedded Deep-Sea Fiber Optic Distributed Temperature Sensing Systems for Long-Term Ocean Observatory and UUV-Based ApplicationsEmbedded Deep-Sea Fiber Optic Distributed Temperature Sensing Systems for Long-Term Ocean Observatory and UUV-Based Applications. The description of this effort can be located in R2 sub-activity DURIP in PE 0601103N. Funding supports the University of Rhode Island to design and fabricate deep-sea Distributed Tempurature Sensing system for long-term Ocean Observatory and UUV-Based Applications. Two systems will be fabricated; one will be a compact, large-diameter design oriented at long-term deep sea observing, and the other will be a slender diameter design focused on UUV applications. Major components include a Silixa XT-DTS (provided in separate components with consultation services from the company), titanium pressure housings, custom pressure tolerant fusion-spliced fiber optic connectors, and custom fiber optic sensing cables. One sensing cable will be very thin diameter (0.035~), with minimal working strength (50lb), but will be abrasion-resistant and very flexible. The other sensing cable will be a thin-diameter (0.085~) steel-armored fiber optic cable, with 150lb working strength, meant for deployment in extremely harsh and demanding applications. To build the complete deep-sea DTS systems, URI will integrate the following list of components. These will be integrated into two housing designs with different sensing fibers(soft/flexible with 50lb working strength, and hard/durable with 150lb working strength). The Silixa XT-DTS, major OEM components include a Control PC, Reference oven, Optics assembly, Data acquisition module (DAQ), and Heatsink board (s). Funding includes Engineering support hours to consult with URI and contracted engineers, alterations of OEM components to match embedded system requirements; Two deep-sea housings and lifting/deployment frames. One is designed for 1-year; seafloor deployment, the other for UUV-oriented platforms; Custom fiber optic feedthrough, designed for fusion splicing on either end of thebulkhead with multimode fiber; Two multimode-fiber sensing cables. One is a custom 0.035~ diameter ruggedized fiber optic sensing cable, tightly buffered, negatively buoyant yet thin and flexible, designed for 1-year seafloor deployment with a wide temperature range (provided by Linden Photonics). The other is a custom 0.085~ diameter steel-armored, tightly buffered fiber optic cable (provided by Cortland USA).
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jun 13, 2019
- Source ID
- N000141912392
Entities
People
- Brennan T Phillips
Organizations
- Office of Naval Research
- United States Navy
- University of Rhode Island