Stable multiwavelength and passively mode-locked Yb-doped fiber laser based on nonlinear polarization rotation

Wavelength-Switchable Dissipative Soliton Fiber Laser With a Chirped Fiber Grating Stop-Band Filter

“…This can be explained as following: though the stopband of chirp FBG and gain profile could also provide spectral filter at 1068 nm, the lasing there requires also the suppression of lasing at 1032 nm, where the gain is higher. The NPE effect could introduce wavelength-dependent loss as demonstrated in [16]; however, it may not be sufficient. When the cavity length is extended, first, the artificial birefringence filter induced by cavity birefringence has a smaller bandwidth, which may introduce higher loss at 1032 nm, and second, the longer cavity length with a low repetition rate significantly increases the pulse energy of the random surge of the background noise, which facilitates the mode-locking operation at 1068 nm [17].…”

A C-band widely tunable and switchable erbium-doped fiber laser based on a Sagnac-like loop embedded in Lyot filter

“…In this study, a widely tunable and switchable multiwavelength EDFL based on a Sagnac-like loop embedded in Lyot filter is proposed. We find that the NPR effect refers to the different polarization states caused by the nonlinear effect of the fiber when the polarized light propagates in the fiber [20]. We use NPR effects for tunable operations in the experiment.…”

Spectrum research on the passive mode-locked $$\hbox {Yb}^{3+}$$ Yb 3 + -doped fiber laser

“…Stable multi-wavelength mode-locked fiber lasers are particularly useful in fiber-optical sensing, optical instrumentation, microwave photonic systems, optical signal processing, wavelength-division-multiplexing transmission systems and so on Pudo and Chen (2003), Lou et al (2004), Chen et al (2000), Gong et al (2005), (2006), Li and Chan (1998), Yao et al (2001), Hayahi and Yamashita (2003), Bellemare et al (2000), Wey et al (1997), , Vlachos et al (2000), Mielke et al (2003), Tu et al (2007), Fenga et al (2006), Yeh et al (2007), Schultz et al (2009), Okhotnikov et al (2003, Kivist et al (2008), Zhe et al (2009), Song et al (2009a), Song et al (2009b), due to the numerous advantages including the generation of narrow high-repetition-rate pulse trains at multiple wavelengths, high power, low noise and the compatibility with other fiber-optic components. Many different mode-locked multi-wavelength fiber lasers have been reported in the last few years.…”

“…Based on so many advantages, passive multi-wavelength mode locked fiber lasers have been widely studied by many people currently Tu et al (2007), Fenga et al (2006), Gong et al (2006), Yeh et al (2007). In order to generate multi-wavelength laser, all kinds of filters were used such as Mach-Zehnder filter Tu et al (2007) However, multi wavelength tunable passive mode locked Yb 3+ -doped fiber laser only by appropriately rotating the polarization controllers has not been reported to our best knowledge. In this paper a tunable four wavelengths passive mode locked Yb 3+ -doped fiber laser is obtained by only adjusting the polarization controller carefully and choosing the proper parameters of fiber laser.…”