The thermal stability of a vertical-cavity surface-emitting laser（VCSEL） array is enhanced by redesigning the mesa arrangement. Based on a thermoelectric coupling three-dimensional（3D） finite-element model, an opt...The thermal stability of a vertical-cavity surface-emitting laser（VCSEL） array is enhanced by redesigning the mesa arrangement. Based on a thermoelectric coupling three-dimensional（3D） finite-element model, an optimized VCSEL array is designed. The effects of this optimization are studied experimentally. Power density characteristics of VCSEL arrays with different mesa configuration are obtained under different thermal stress in which the optimized device shows improved performance. Optimized device also shows better stability from measured spectra and calculated thermal resistances. The experimental results prove that our simulation model and optimization is instructive for VCSEL array design.展开更多
The living area of an offshore platform is the main living place for operators in offshore oil and gas fields.Fire risk assessment plays an important role in the safety of personnel in offshore platforms.In this paper...The living area of an offshore platform is the main living place for operators in offshore oil and gas fields.Fire risk assessment plays an important role in the safety of personnel in offshore platforms.In this paper,a fire risk assessment mathematical model for offshore platfoms is proposed based on a comprehensive safety assessment method.The concept of danger time is presented according to the evaluation criteria of safe evacuation.The fire risk of offshore platforms is assessed by combining probability statistics with numerical simulation.The fire risk is quantitatively assessed by using an N500 deep water semi-submersible support platform as an example.According to the FN curve,fire frequency,fire escalation probability,and casualty probability,the rationality of marine general layout is analyzed,and the general layout design could be optimized to reduce the fire risk.展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.61434005,61474118,61376070,11404326,and 11674314)the Jilin Provincial Scientific and Technological Development Program,China(Grant No.20150203011GX)+1 种基金the Changchun Science and Technology Project,Jilin Province,China(Grant No.15SS02)the Youth Innovation Promotion Association,Chinese Academy of Sciences(Grant No.2017260)
文摘The thermal stability of a vertical-cavity surface-emitting laser（VCSEL） array is enhanced by redesigning the mesa arrangement. Based on a thermoelectric coupling three-dimensional（3D） finite-element model, an optimized VCSEL array is designed. The effects of this optimization are studied experimentally. Power density characteristics of VCSEL arrays with different mesa configuration are obtained under different thermal stress in which the optimized device shows improved performance. Optimized device also shows better stability from measured spectra and calculated thermal resistances. The experimental results prove that our simulation model and optimization is instructive for VCSEL array design.
基金supported by the Emergency and Escape Technology for Personnel in Large Living Areas on the Offshore Platform (KY10100170137)the Key Technologies for Design and Construction of Polar Small Cruise Ships+1 种基金the Key Technologies for Design and Construction of Medium-Sized Cruise Shipsthe Joint Fund for Pre-Researched Shipbuilding Industry (6141B042851)。
文摘The living area of an offshore platform is the main living place for operators in offshore oil and gas fields.Fire risk assessment plays an important role in the safety of personnel in offshore platforms.In this paper,a fire risk assessment mathematical model for offshore platfoms is proposed based on a comprehensive safety assessment method.The concept of danger time is presented according to the evaluation criteria of safe evacuation.The fire risk of offshore platforms is assessed by combining probability statistics with numerical simulation.The fire risk is quantitatively assessed by using an N500 deep water semi-submersible support platform as an example.According to the FN curve,fire frequency,fire escalation probability,and casualty probability,the rationality of marine general layout is analyzed,and the general layout design could be optimized to reduce the fire risk.
