25 March 2017 Polarization properties of vector solitons generated by modulation instability in a fiber with circular birefringence
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Abstract
We analyzed the two coupled propagation equations in a circularly birefringent fiber. We found that the difference between perpendicular and parallel Raman gain results in energy transform from a slow to fast circularly polarized component. We have shown this effect analytically and by a numerical simulation. We analyzed and measured the polarization of solitons generated by modulation instability and we found that polarization ellipticity of solitons is distributed randomly; however, the ellipticity of polarization is close to the polarization of the input pulse and always is shifted toward the circular polarization. Therefore, if a circularly polarized pulse is launched at the fiber input then the produced solitons are also circularly polarized. In the experiment, we used SMF-28 twisted fiber by 6    turns / m ; the fiber twist mitigated the random linear birefringence, and the fiber was pumped by 1-ns pulse. We have found that circular polarization of the pump pulse in the twisted fiber produces circularly polarized solitons with a high grade of polarization while in the fiber without twist the soliton polarization was random.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Ariel Flores-Rosas, Evgeny A. Kuzin, Roberto Arceo, Orlando Díaz-Hernández, Victor I. Ruiz-Pérez, Gerardo J. Escalera-Santos, "Polarization properties of vector solitons generated by modulation instability in a fiber with circular birefringence," Optical Engineering 56(3), 036115 (25 March 2017). https://doi.org/10.1117/1.OE.56.3.036115 . Submission: Received: 25 October 2016; Accepted: 13 February 2017
Received: 25 October 2016; Accepted: 13 February 2017; Published: 25 March 2017
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