Observations of Three Types of Sidebands
in a Passively Mode-Locked Soliton Fiber Laser¹

D. D. Han* and L. Yun

State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics,
Chinese Academy of Sciences, Xi’an 710119, China

*e-mail: hdong.gy@hotmail.com

Received May 27, 2012

Abstract—We have experimentally observed three types of sidebands in a passively mode-locked soliton fiber
laser with large anomalous dispersion for the first time to our best knowledge. By appropriately adjusting the
polarization state of laser cavity, the conventional peak sidebands, peak-dip sidebands, and dip sidebands
appear in the soliton spectra, respectively. The peak-dip and dip sidebands exhibit distinct characteristics from
the conventional peak sidebands. The formation mechanism of the new type sidebands can be attributed to the
periodic power variation. This work could help to a deeper insight of the spectrum shaping mechanism of con-
ventional solitons.

10.1134/S1054660X12120092

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