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Your search keyword '"Durak, F. E."' showing total 4 results
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4 results on '"Durak, F. E."'

1. Saturation characteristics of a gain-clamped extended length L-band erbium doped fiber amplifier.

Author

Altay, E., Yagci, M. E., Eken, S. K., Altuncu, A., and Durak, F. E.

Subjects
ERBIUM, FIBER Bragg gratings, ELECTROSTATIC discharges, FIBERS
Abstract

In this study, saturation and spectral characteristics of a gain-clamped extended length L band (1570 nm-1605 nm) erbium doped fiber amplifier (EDFA) is presented. Firstly, the output ASE spectral characteristics of the extended length L band EDFA was analyzed for a wideband gain flattened operation. The amplification stage has a couple of symmetrical fiber Bragg grating (FBG) which provides a measured gain-clamped operation for a dynamic input signal power range of 26.1 dB at 1585 nm. In addition, the extended length structure of the proposed design provides a moderately flattened saturated gain spectrum throughout the L-Band with an average gain of 25 dB using moderate bidirectional pumping powers. The proposed L-band amplifier configuration achieves both high performance gain-clamped and gain-flattened operation to be used as a part of future wideband C+L band erbium doped fiber amplifiers. [ABSTRACT FROM AUTHOR]

Published
2023
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3. Yttrium Oxide (Y 2 O 3) as a Pulse Initiator in a Mode-Locking Erbium-Doped Fiber Laser.

Author

Zulkipli, N. F., Muhammad, A. R., Batumalay, M., Rosol, A. H. A., Altuncu, A., Durak, F. E., Ma'mun, M. F., and Harun, S. W.

Subjects
FIBER lasers, YTTRIUM oxides, ULTRASHORT laser pulses, MODE-locked lasers, OPTICAL spectra, POLYVINYL alcohol
Abstract

Mode-locking is an ultra-short pulse laser generation technique. The range of pulse duration may vary from picoseconds to femtoseconds. Yttrium Oxide (Y2O3) based saturable absorber (SA) was appropriately revealed in the mode-locked method within the 1.55-micron regime. Y2O3 is perfect for strength, melting point, and chemical stability and can be used as a laminated insulator due to its properties. Moreover, Y2O3 also owns broadband service, switching speed, and engineering features. The Y2O3-PVA film was produced by combining the 50 mg Y2O3 powder into a 50 mL polyvinyl alcohol (PVA) solution and stirring it at room temperature for about 24 h. A mode-locked pulse was recorded with the integrated Y2O3-PVA SA in the erbium-doped fiber laser (EDFL) cavity, and the output spectrum optical spectrum analyzer displayed was around 1560.66 nm. In addition to the sustained mode-locked pulse, a nearly constant repetition rate of 1.01 MHz at a specific pump power begins from 175.87 mW to 228.04 mW while the pulse duration is 4.15 ps. Lastly, the mode-locked pulse had been evaluated, which showed the peak power started from 4.94 kW to 6.07 kW. [ABSTRACT FROM AUTHOR]

Published
2022
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