Journal of Optoelectronics Engineering

Current Issue» Volume 2, Number 2 (2014)

Article

Optimization of MOPA for YD-DC Fiber Laser

1M.Tech, Amity Institute of Laser Technology & Optoelectronics, Amity University, India


Journal of Optoelectronics Engineering. 2014, 2(2), 29-32
DOI: 10.12691/joe-2-2-2
Copyright © 2014 Science and Education Publishing

Cite this paper:
Tejaswi Challa. Optimization of MOPA for YD-DC Fiber Laser. Journal of Optoelectronics Engineering. 2014; 2(2):29-32. doi: 10.12691/joe-2-2-2.

Correspondence to: Tejaswi  Challa, M.Tech, Amity Institute of Laser Technology & Optoelectronics, Amity University, India. Email: tejaswi.challa@gmail.com

Abstract

Power scalability of fiber lasers, today, is from few mW to several kW in CW operation and tens of kW in pulsed operation. The wide range of power is possible due to various configurations of the fiber laser system. One such configuration is Master Oscillator Power Amplifier (MOPA), the topic of interest of our paper. We explain the design aspects of MOPA and discuss optimization methodology for MOPA based fiber lasers. We propose optimization, under co-directional pumping, of pump laser, seed laser and the fiber length. We have focused on the state of art technologies considering Ytterbium doped double clad single mode Nufern fiber.

Keywords

References

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Article

Preparation and Characterization of Polymer Nano Fibres Produced from Electrospinning

1Department of Mechanical Engineering, KIOT Wollo University, Kombolcha (SW), Ethiopia

2Department of Chemical Engineering, KIOT Wollo University, Kombolcha (SW), Ethiopia


Journal of Optoelectronics Engineering. 2014, 2(2), 24-28
DOI: 10.12691/joe-2-2-1
Copyright © 2014 Science and Education Publishing

Cite this paper:
Raja Thiyagarajan, Omprakash Sahu. Preparation and Characterization of Polymer Nano Fibres Produced from Electrospinning. Journal of Optoelectronics Engineering. 2014; 2(2):24-28. doi: 10.12691/joe-2-2-1.

Correspondence to: Omprakash  Sahu, Department of Chemical Engineering, KIOT Wollo University, Kombolcha (SW), Ethiopia. Email: ops0121@gmail.com

Abstract

The ultrafine nylon fibers were prepared by electro spinning of nylon-6 solution in formic acid in the concentrations ranging from 12–28 wt%. The morphology of the electro spun nylon-6 fibers were investigated by scanning electron microscope (SEM) and the viscosities are measured with the help of redwood viscometer. The effects of electro spun process parameters such as the spinnable concentration of nylon 6 in formic acid, viscosity of polymer solutions, and influence of polymer solution concentration on fiber morphology were also studied. The results show that the spinnable concentration of nylon 6/formic acid solution is in the range of 16–28 wt%. For the lower concentration of nylon-6 solution of 16wt%, no continuous fibers but beads and some fibres segments could be obtained and higher solution concentration of 24wt% favours the formation of uniform fibers without beads.

Keywords

References

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