Spectral width variation of ultrashort laser pulses in monomode optical fibers

Year: 2009

Authors: Kbashi HJ., Jawad H., Al-Naimee KA., Benocci R., Carpeggiani P., Perego C., Batani D.

Autors Affiliation: Univ Baghdad, Coll Sci, Dept Phys, Baghdad, Iraq; Univ Baghdad, Inst Laser Postgrad Studies, Baghdad, Iraq; CNR, Ist Nazl Ott Applicata, I-50125 Florence, Italy; Univ Milano Bicocca, Dipartimento Fis G Occhialini, Milan, Italy.

Abstract: Femtosecond laser pulse propagation in monomode optical fibers is demonstrated and investigated numerically (by simulations) and experimentally in this paper. A passively mode locked Nd:glass laser giving a pulse duration of about 200 fsec at 1053 nm wavelength and 120 mW average optical power with 100 MHz repetition rate is used in the experimental work. Numerical simulations are done by solving the nonlinear Schrodinger equation with the aid of Matlab program. The results show that self phase modulation (SPM) leads to compression of the spectral width from 5 nm to 2.1 nm after propagation of different optical powers (34, 43, 86 and 120 mW) in fibers of different length (5, 15, 35 m). The varying optical powers produced a varying phase shift. The output spectral width also changed with the fiber length at a given peak power.

Journal/Review: JOURNAL OF NONLINEAR OPTICAL PHYSICS & MATERIALS

Volume: 18 (3)      Pages from: 541  to: 552

More Information: The authors wish to acknowledge the support of the LANDAU NETWORK-CENTRO VOLTA in Como and the support of the Programme of the Italian Minister of University for the Requalification of the Iraqi University System.
KeyWords: Femtosecond laser; self phase modulation; spectral narrowing
DOI: 10.1142/S0218863509004774

ImpactFactor: 0.549
Citations: 1
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