Random distributed feedback Raman fiber laser with polarized pumping

Wu, Han; Churkin, Dmitry V.; Vatnik, Ilya D.; Fan, Mengqiu; Rao, Yu

doi:10.1088/1612-2011/12/1/015101

Cited by 31 publications

(19 citation statements)

References 38 publications

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“…Indeed, the position of the maximum longitudinal distribution in the random fiber laser shifts toward longer distances for the high-order Stokes waves [26]. Also, with the forward-pumped random-fiberlaser-based distributed amplification, the lasing power distribution can be adjusted by tuning the reflectivity of the point-based mirrors located on the fiber span end [34] or by polarization control [47], making manipulation of the signal power distribution viable.…”

Section: Random Fiber Laser For Applications In Distributed Sensingmentioning

confidence: 99%

Recent advances in fundamentals and applications of random fiber lasers

et al. 2015

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Doc. ID 239686)Random fiber lasers blend together attractive features of traditional random lasers, such as low cost and simplicity of fabrication, with high-performance characteristics of conventional fiber lasers, such as good directionality and high efficiency. Low coherence of random lasers is important for speckle-free imaging applications. The random fiber laser with distributed feedback proposed in 2010 led to a quickly developing class of light sources that utilize inherent optical fiber disorder in the form of the Rayleigh scattering and distributed Raman gain. The random fiber laser is an interesting and practically important example of a photonic device based on exploitation of optical medium disorder. We provide an overview of recent advances in this field, including high-power and high-efficiency generation, spectral and statistical properties of random fiber lasers, nonlinear kinetic theory of such systems, and emerging applications in telecommunications and distributed sensing.

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Section: Random Fiber Laser For Applications In Distributed Sensingmentioning

confidence: 99%

Recent advances in fundamentals and applications of random fiber lasers

et al. 2015

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“…Detailed spectral profiles of output pump, 1 st , 2 nd and 3 rd Stokes were measured at nearly equal generating powers. In comparison to the random fiber laser based on a non-polarizationmaintaining fiber with polarized pumping, where the random sharp peaks in the output spectra are observed 6 , here the stable and smooth spectra are obtained. Similar spectral shapes were obtained for cascaded random lasing in non-PM fiber with depolarized pumping 8 , but the linewidth in our case appear to be smaller at the same power.…”

Section: Discussionmentioning

confidence: 81%

“…First attempts to govern the polarization state of RRFL output radiation faced some troubles. Implementation of the linearly polarized pumping 6 results in the generation of partially polarized output radiation. The polarization state appears to be very sensitive to the regime of operation and in its turn strongly influences the laser characteristics (power and spectrum) that worsens its performance.…”

Section: Introductionmentioning

confidence: 99%

Linearly polarized cascaded random fiber laser with ultimate efficiency

Zlobina

Kablukov

Babin

2015

2015 European Conference on Optical Communication (ECOC)

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“…Mirrorless fiber Raman lasers based on a distributed feedback via Rayleigh scattering [1] have attracted a great deal of attention in the last decade, as their lasing efficiency and beam quality are comparable to those of standard cavity lasers. Recently, in order to govern the state of polarization (SOP) of the laser output radiation and increase its efficiency, the use of polarized pumps and polarization-maintaining (PM) fiber have been proposed [2][3][4]. Here, we propose the complete control of the SOP of the output by means of the use of spun fiber.…”

mentioning

confidence: 99%

“…Recently, in order to govern the state of polarization (SOP) of the laser output radiation and increase its efficiency, the use of polarized pumps and polarization-maintaining (PM) fiber have been proposed [2][3][4]. Here, we propose the complete control of the SOP of the output by means of the use of spun fiber.…”

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confidence: 99%

Open-Cavity Spun Fiber Raman Lasers with a Polarized Output

Nuño

Rizzelli

Galazzi

et al. 2016

Conference on Lasers and Electro-Optics

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Abstract:We experimentally study the polarization properties of the outputs of different opencavity Raman fiber lasers based on spun fiber and a highly polarized pump, demonstrating controlled output polarization and improved threshold. Mirrorless fiber Raman lasers based on a distributed feedback via Rayleigh scattering [1] have attracted a great deal of attention in the last decade, as their lasing efficiency and beam quality are comparable to those of standard cavity lasers. Recently, in order to govern the state of polarization (SOP) of the laser output radiation and increase its efficiency, the use of polarized pumps and polarization-maintaining (PM) fiber have been proposed [2][3][4]. Here, we propose the complete control of the SOP of the output by means of the use of spun fiber. These fibers are created by rotating the fiber preform during the drawing processes, producing a fiber with a negligible average polarization mode dispersion (PMD).The schematic setup designed for our experiment consists of a 2 km piece of spun fiber pumped by a CW fiber laser at 1366nm, able to produce up to 38dBm. The pump is polarized by a polarizer prism, which inserts losses equal to approximately 3.6 dB, and injected into the fiber on one end, whereas a fiber Bragg grating (FBG), centered at 1454.5 nm, is initially situated at the opposite fiber end (scheme 1) or the same end (scheme 2). These two options are depicted in figure 1. The evolution of the forward-propagating (co-pumped) output spectrum for scheme 1, measured on the right side, is plotted in figure 2(a). We observe the generation of a supercontinuum at 1393 nm. When the open cavity is pumped with the depolarized pump (i.e., without the polarizer prism), this supercontinuum absorbs most of the energy, hence preventing the cavity from lasing for injected pump powers up to 35.5 dBm. The situation changes if we switch to the highly polarized pump. The evolution of the output spectrum can be divided in two stages. For pump powers below 33.5 dBm, the performance is dominated by XPM and parametric effects. The power of the supercontinuum, mentioned above, is increased with the pump power. For pump powers higher than 32 dBm, a new peak appears at 1453 nm growing until pump power reaches 33.5 dBm at which both peaks (1393 nm and 1453 nm) begin to decrease, as Raman effect becomes dominant and the device begins to lase at 1453 nm. Moreover, the power of the signal at 1393 nm is also reduced when the pump power is increased. Remarkably, lasing in this forward-propagating component occurs at the Raman gain peak, which does not fully overlap with the FBG wavelength. This result suggests that lasing is in this case independent on the presence of the FBG. This premise is confirmed by moving to scheme 2, in which the power threshold is similar, although the FBG is situated at the pumping end.

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Random distributed feedback Raman fiber laser with polarized pumping

Cited by 31 publications

References 38 publications

Recent advances in fundamentals and applications of random fiber lasers

Recent advances in fundamentals and applications of random fiber lasers

Linearly polarized cascaded random fiber laser with ultimate efficiency

Open-Cavity Spun Fiber Raman Lasers with a Polarized Output

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