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The rising demand in ultrafast radiation sources has boosted the search for high power and high stability mode-locked fiber lasers, particularly at telecom wavelengths. In this work, we demonstrate the first ultrafast mode-locked fiber laser relying on InN as saturable absorber, centered at 1.5μm. The saturable absorber consists of a 1-μm-thick InN grown on a GaN-on-sapphire template deposited by...
Nonlinear Polarization Evolution (NPE) — a passive mode-locking technique — is successfully used in many all-fiber ultrafast oscillators. It is based on a temporal filtration of the pulse polarization state affected by a self-action due to the instantaneous Kerr nonlinearity. To work properly, most of NPE based architectures of fiber lasers contain pieces of standard optical fibers or bulk optical...
Mechanisms of rogue waves (RWs) emergence have been extensively studied in fiber lasers with nonlinearly driven cavities [1], Raman fiber amplifiers and lasers [2], and fiber lasers via modulation of the pump [3]. Previously, it has been found that RWs can be emerged because of soliton-soliton interaction through the overlapping of their tails or soliton-dispersive wave interaction. The result of...
In 1997, Yoshida et al. inserted a Fabry-Perot filter in a modulation instability fiber laser cavity [1], the free spectral range (FSR) of the Fabry-Perot fixed the RF to 115 GHz; however the pulsed laser was poorly stable. Since then, lasers of increasing performance have been demonstrated using variants of this method. In 2012, Peccianti et al. demonstrated the first fiber laser harmonically mode-locked...
Femtosecond mode-locked fiber lasers have been actively employed in many practical applications such as micro-machining, corneal surgery and multi-photon imaging, thanks to their compactness, alignment-free operation, and low cost. To enhance the long-term stability and self-starting operation of mode-locked lasers, saturable absorber (SA) devices, such as semiconductor saturable absorber mirrors...
Tm-doped fiber lasers, operating in the 2 μm eye-safe region (the absorbable band of human tissues) [1], have potential applications in molecular spectroscopy and medicine [1], where tuning the laser operating wavelength is highly desirable [1]. Tunable multiwavelength mode-locked fiber lasers have been widely reported in the 1 and 1.5 μm regions [2, 3]. Ref. [4] studied the tunability of switchable...
Passively mode-locked femtosecond fiber lasers operating in the telecom band around 1.5 μm are well discovered since many years. Thulium- and Holmium-based hght sources in 2 μm region have greatly gained interest in recent years. Because of the absence of optical transitions in fibers doped with rare-earth ions, the gap between these two spectral regions, namely laser sources at wavelengths around...
Mode-locked fiber lasers emitting in the wavelength range beyond 2 μm [1] are promising for a number of applications including environmental sensing, material processing, medicine etc. Mode-locked holmium fiber lasers tend to operate below 2.1 μm wavelength. For some applications it is important to shift the laser wavelength further to the infrared. Previous demonstration of a 2107-nm mode-locked...
High power mode-locked (ML) fiber lasers generating femtosecond pulses in telecom window near 1.55 μm is a field of growing interest due to the apparent success of all-normal dispersion (ANDi) fiber lasers generating chirped pulses in the wavelength region around 1 μm [1, 2]. Such lasers have a wide range of practical applications, from CARS and Terahertz spectroscopy to few-cycle pulse synthesis...
Passively mode-locked, ultrafast and compact laser sources operating in the wavelength range beyond 2 μm have gained interest for several applications such as nonlinear frequency conversion into the mid-infrared and THz region, material processing, medicine etc. Typically, Ho-doped optical fibers (HDF) are used to directly address this spectral region in ultrafast mode-locked oscillators while Ho:YLF...
Dissipative soliton resonance (DSR) fiber mode-locked lasers (MLL) are attracting a steadily growing interest over the recent years, due to their ability to generate relatively long (ns-scale), strongly chirped and large energy pulses directly inside a main oscillator. Thulium-doped fiber (TDF) DSR MLLs, optionally enhanced with amplification and compression stages, are in high demand in various application...
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