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Miclos S.,Romanian National Institute for Optoelectronics | Savastru D.,Romanian National Institute for Optoelectronics | Lancranjan I.,Advanced Study Center National Institute of Aerospace Research Elie Carafoli
Romanian Reports in Physics | Year: 2010

Numerical simulation analysis of fiber optic bending sensitivity aiming to improve fiber lasers design is developed, analyzing both the transition loss, associated with abrupt curvature change at the beginning and the end of a bend, and pure bending loss associated with the loss from the constant curvature bending in between. Source


Miclos S.,Romanian National Institute for Optoelectronics | Savastru D.,Romanian National Institute for Optoelectronics | Lancranjan I.,Advanced Study Center National Institute of Aerospace Research Elie Carafoli
International Journal of Mathematics and Computers in Simulation | Year: 2010

This paper is pointing to numerical simulation of various aspects of distributed feedback fiber laser sensors and their applications mainly in the field of the aeronautical applications. The developed numerical analysis has the aim of a better understanding of DFB-FL itself and of its interaction with environment in order to be operated as a sensor. Numerical analysis concentrates both on the FEM and phenomenological methods. Source


Savastru D.,Romanian National Institute for Optoelectronics | Miclos S.,Romanian National Institute for Optoelectronics | Lancranjan I.,Advanced Study Center National Institute of Aerospace Research Elie Carafoli
International Journal of Mathematics and Computers in Simulation | Year: 2010

The results of a theoretical analysis of the output noise generated by the DFB fiber laser sensor with applications mainly in the field of the aeronautical applications are presented. The main purpose of this analysis is to evaluate the magnitude of the DFB fiber laser sensor output noise. This evaluation is necessary for a proper design of the sensor, especially regarding sensitivity and dynamic range. It is demonstrated that the main source of DFB fiber laser sensor output noise is constituted by the Amplified Spontaneous Emission (ASE) of the fiber amplifier. An extended range of linear response was achieved optimizing the sensor parameters. ASE noise level was brought to an acceptable level. Judging the time response, the designed sensor acts like a high fidelity recorder. Source


Savastru D.,Romanian National Institute for Optoelectronics | Vlase A.,Polytechnic University of Bucharest | Lancranjan I.,Advanced Study Center National Institute of Aerospace Research Elie Carafoli | Savastru R.,Romanian National Institute for Optoelectronics | Miclos S.,Romanian National Institute for Optoelectronics
UPB Scientific Bulletin, Series A: Applied Mathematics and Physics | Year: 2011

Numerical simulations were performed concerning the design of a high power fiber laser operated in CW free-running and passively Q-switching operation, pointing to an improved design of a laser source dedicated to art conservation. The presented preliminary results will be continued with other concerning the interaction with the target (the art piecework) of the laser beam and combining the two numerical models. The main idea of the developed simulation model consists in correlating the laser oscillator output parameters with the artwork specific characteristics in order to optimize the entire procedure of art restoration. Source


Lancranjan I.,Advanced Study Center National Institute of Aerospace Research Elie Carafoli | Miclos S.,Advanced Study Center National Institute of Aerospace Research Elie Carafoli | Miclos S.,Romanian National Institute for Optoelectronics | Savastru D.,Advanced Study Center National Institute of Aerospace Research Elie Carafoli | And 3 more authors.
Journal of Optoelectronics and Advanced Materials | Year: 2010

This paper is the second of a series on numerical simulation of distributed feedback fiber laser (DFB-FL) sensors and their applications, especially in aeronautics. Here the developed numerical analysis of a DFB-FL air acoustic sensor is presented. The main purpose of the performed theoretical analysis consists into a better understanding of DFB-FL itself and of its interaction with environment in order to be operated as an air acoustic sensor. Source

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