Abstract
Dark solitons, which have better stability in the presence of noise, have potential applications in optical communication and ultrafast optics. In this paper, the dark soliton formation in erbium-doped fiber lasers based Sb(2)Te(3) saturable absorber (SA) is first experimentally demonstrated. The Sb(2)Te(3) SA is fabricated by using the pulsed laser deposition method. The generated dark solitons are centered at the wavelength of 1530 nm and repetition rate of 94 MHz. Analytic solutions for dark solitons are also obtained theoretically.
Highlights
Solitons, which can be divided into bright and dark ones, exist in nonlinear systems [1]
Dark solitons emitted from the intra-cavity PBS with the repetition rate of 94 MHz, which is measured by a radio frequency analyzer (Agilent E4407B)
When we reduce the length of SMF-28 fiber in the modelocked erbium-doped fiber (EDF) laser, and rotate the QWP and HWP in the ring cavity to change the intra-cavity polarization, bright solitons can be observed
Summary
Solitons, which can be divided into bright and dark ones, exist in nonlinear systems [1]. To achieve passive mode locking of a fiber laser, different techniques have been used These conventional techniques include the figure-of-eight cavity method and nonlinear polarization rotation (NPR) technique [21,22]. TIs, such as Bi2Te3, Bi2Se3 and Sb2Te3, have the characteristics with a small band gap in the bulk state and a gapless metallic state in the surface They have broadband saturable absorption features and giant third order nonlinear optical property [30,31].
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