Overview of Optical Techniques for Characterization of High-Power Infrared Gas Lasers

Singhal, Gaurav; Mainuddin,; Rajesh, R.; Beg, Mirza Tariq; Tyagi, Rakesh K.; Dawar, A. L.

doi:10.1109/jsen.2015.2409114

Cited by 13 publications

(3 citation statements)

References 54 publications

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“…Therefore, it is necessary to determine the utility that it derives due to the financial cost. This is defined as [ 9 , 17 , 31 , 32 ]:

where cost is the total cost of the security plan, a cost is a negative factor that indicates the preference of player A for cheaper modes of action than more expensive, and p budget is a penalty imposed if a permissible cost limit is exceeded.…”

Section: Definition Of the Problemmentioning

confidence: 99%

Optimization of Cyber Tactics in Sports Strategies Using Hybrid AI Decision-Making Technologies

Duan¹

2022

Computational Intelligence and Neuroscience

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One of the main problems of modern research concerns the optimal design of solutions to address cybersecurity problems, with methods that provide the ability to choose an objective function different from that of the classic problem of more economical design while allowing the use of constraints on any possible variable during planning, including financial resources. The number of corresponding solutions concerns the issue of optimal design of security strategies with a simulation that lies in game theory, with players, the defender on one side defending the system managing the available options of strategic solutions, and the attacker, who chooses the way to strike the system, based on some attack scenarios that cannot be easily predicted. The inherent difficulty of implementing the proposed solutions lies in the combined explosion of all possible combinations that make up the solution space, the complete examination of which requires a lot of computational time and computing resources, to the point that their use becomes unprofitable. This weakness is attributed to even minor problems, and the possible strategies available to the defender are finite but at the same time numerous. To solve the abovementioned problem, the work proposes a hybrid system that aims to identify the best possible approach in the theoretically optimal solution in a short time and with minimal computing resources. Specifically, a heuristic optimization methodology is used with overlapping answers between two contiguous neighborhoods based on the Bloom Filters structure that supports fast listings and searches. This methodology, which is evaluated in optimizing safety strategies in the sports industry, brings about 40% optimization.

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“…Therefore, it is necessary to determine the utility that it derives due to the financial cost. This is defined as [ 9 , 17 , 31 , 32 ]:

Section: Definition Of the Problemmentioning

confidence: 99%

Optimization of Cyber Tactics in Sports Strategies Using Hybrid AI Decision-Making Technologies

Duan¹

2022

Computational Intelligence and Neuroscience

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“…Optical diagnostics based on absorption spectroscopy has been utilised for iodine concentration measurement [16][17][18] using DAS. The transmitted light (without and with iodine) mostly at peak iodine absorption wavelength of 490 nm is passed through a probe cell of nearly 5 cm length and focused on to a suitable Si-detector.…”

Section: Iodine Diagnosticsmentioning

confidence: 99%

Data Acquisition System for Chemical Iodine Generation Suitable for Flowing Medium Chemical Oxygen Iodine Laser

et al. 2021

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Development of infrared flowing medium lasers needs to be envisaged in a manner that practical aspects such as system compactness, short readiness time, low system size, weight and power are met to make them field deployable. In this context, the critical aspect of in-situ production of lasing species (Iodine) in Chemical Oxygen Iodine Lasers (COIL), one of the most potent flowing medium lasers, has been investigated. The paper dwells on chemical generation of iodine and its precise flow and parameter control by implementing a customised Data Acquisition System (DAS). Iodine is generated in a chemical reaction of Cuprous Iodide (CuI) with chlorine. This is achieved by precisely controlled flow of chlorine diluted with a carrier gas (N2 ) in a ratio of 1:2. DAS includes regulated gas feed, accurate thermal stabilisation, relevant diagnostics and implementation of necessary safety interlocks in a real time operation scenario for establishing the system efficacy and scalability. The studies have demonstrated chemically generated iodine flow rate of ~ 1.2 mmol.s-1 for Cl2 flow rate of ~3 mmol.s-1 all measured in real time using the developed DAS with a conversion efficiency of 80%. Developed I2 supply system has potential to deliver iodine on demand with required flow rates, measurement uncertainty of ~ 4.5 percent and advantages of smaller specific weight and size with reduced system readiness time and electrical power supply using DAS system with adequate safety interlocks.

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“…One of the essential diagnostics 16) for characterising the laser source is the measurement of output power. Power measurement of high power lasers for more than tens of kilowatt level is carried out using indirect laser beam absorption method.…”

Section: Power Measurementmentioning

confidence: 99%

Hybrid Data Acquisition and Analysis System for Flowing Medium Lasers

Dohare¹,

Mainuddin²,

Singhal³

2020

Def. Sc. Jl.

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The medium gas lasers involves in-situ generation of the lasing medium, hence are associated with several complex processes including mixing of pumping and lasing species, energy exchange between the species, heat generation during reaction and its influence on the flow domain to list a few. Thus, the characterisation of lasing medium, condition of operation of individual critical subsystems and corresponding phenomenon thereof is essential in real time. It is here that a customised data acquisition and analysis system (DAAS) plays a key role. The paper dwells on the realisation of a customised hybrid DAAS with a master-slave architecture, which is portable and provides remote system operation. The noteworthy aspects of the developed DAAS include capability to handle close to 150 channels [64 analog input, 64 digital output, 5 analog output and 17 digital input] simultaneously with varied sampling rates requirement ranging from 100 samples/s to 200 k samples/s, modularity in design enabling scalability. Further, the efficacy of the developed DAAS has been tested by conducting several real time experiments with an existing chemical oxygen iodine laser source with a mass flow rate of 2.3 moles.s-1 both from close ranges and at line of sight remote distances of up to 80 m and nearly 35 m with obstacles.

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Overview of Optical Techniques for Characterization of High-Power Infrared Gas Lasers

Cited by 13 publications

References 54 publications

Optimization of Cyber Tactics in Sports Strategies Using Hybrid AI Decision-Making Technologies

Optimization of Cyber Tactics in Sports Strategies Using Hybrid AI Decision-Making Technologies

Data Acquisition System for Chemical Iodine Generation Suitable for Flowing Medium Chemical Oxygen Iodine Laser

Hybrid Data Acquisition and Analysis System for Flowing Medium Lasers

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