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2016/4/1 Green Cable Systems standardisation of a wet demonstrator HUAWEI MARINE NETWORKS CO., LTD. What is standard? E/O comms interface Sensors Type, sensitivity, size, mounting method? method of connection-electrical or optical? Location relative to repeater Software Language? Interface/ tools Method of connection to sensor/repeater? Operating voltage/current? Operating system/protocol – ethernet? Baud rate? / Size of PCB’s? Operating environment, heat dissipation, hermeticity, humidity,etc? Sampling rate, etc? Data Transmission wavelength Overhead lambda? System functional testing Page 2 E/O interface/comms module Inside or outside the main repeater housing – The big question? Inside: Consumes amplifier space impacting repeater capacity? Adds “in-service” reliability risk to repeater? Increased complexity and build time of repeater? Benefits from proven repeater housing mechanical design Simplifies integration Flexibility on choice of which repeater is instrumented and when should module fail during cable integration/install – deploy or not? No redundant electronics overhead Outside Divorces repeater from science Repeater only needs to support fibre /power penetration of bulkhead (proven)and tap into transmission via passive optics Science Set containing E/O interface and comms module can be built offline and delivered tested Adds additional complexity to integration process – impact to loading time/ship costs? Science Set integral with Pressure sensors and Accelerometers, lead outs to Temperature sensor? Temperature sensors remote mounted to avoid thermal pick up from adjacent electronics. Page 3 Bulkhead mounted sensors – Non starter! Pro’s No impact to integration time Integrated solution removes need for further external mechanics Con’s Space envelope restrictive Potential damage to sensors Limited available bulkhead real estate Hermetic sealing of bulkhead compromised - would need special solution for sensors – testing and validation for 25 yrs? Thermal pick up of temperature sensors from repeater electronics Potential space limitation within repeater for E/O interface/comms module Adds risk to repeater if E/O interface/comms module fails Cannot change out module if failure during cable integration Page 4 Modular sensor set Use of standard repeater with adaption for double penetrator bulkhead, Internal Unit contains only passive optics tap into transmission fibres at O/head wavelength. No active components therefore minimal reliability impact to repeater 5-10m? Independent composite optical /power feed to sensor protected with main transmission cable Utilising proven Branching Unit double hermetic penetration technology it is possible to provide independent composite power and optics to the science module Pressure plus accelerometer sensors packaged with E/O/comms module. Transmission cable uninterrupted without mechanical break out. Temperature sensors mounted in buffer and/or outboard cable protection with protected cabling back to E/O comms module to avoid temperature pick up from module electronics Page 5 Sensor module to repeater connectivity Repeater Cable termination to main transmission cable Standard industry joint between repeater feed through pigtail and main transmission cable identical at each end of the repeater Independent composite optical and low voltage electrical feed from second bulkhead penetration routed with main transmission cable direct to sensor module without break out in termination. Sensor and electronics module Main transmission cable Main transmission cable passes through centre of sensor module without mechanical break out. Transmission path is uninterrupted & mechanical integrity is maintained 5-10 m? Page 6 Huawei Marine Confidential Proposal for Wet demonstrator. Scope of Wet Demonstrator Cabled Ocean Observatory Wet-mate connector Adaptation Device (if required) 50-100m 6-50km LW or LWP Lead-in cable (if required) Sensor Set 6-50km Sensor Set 6-50km Sensor Set End cable and seal Ground rope and anchors Wet mate hybrid or separate power optical penetrators leading to a jumper set to connect to science observatory Page 7 Dummy repeater housing to allow split out of separate composite power and optics feed to sensor set plus facilitate amplifier interface (ethernet) to transmission fibre Potential case for discussion Recovered repeater cable Island A • Low cost option to build a trial demonstrator • Provide a small point to point system • Test and validate sensor pack and robustness of data communications • Leave a legacy system • Generate revenue for some remote islands Island A Thank you www.huaweimarine.com