Random distributed feedback fibre lasers

Turitsyn, Sergei K.; Babin, Sergey A.; Churkin, Dmitry V.; Vatnik, Ilya D.; Nikulin, M. A.; Podivilov, E. V.

doi:10.1016/j.physrep.2014.02.011

Cited by 340 publications

(192 citation statements)

References 378 publications

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“…Above the threshold, the residual pump power at the laser output is decreased down to zero value, whereas the generated Stokes wave power at 1308 nm reaches the value of =7.3 W at the input pump power =11 W. To prove the results, we have performed numeric simulation based on power balance model described in [2,7], and found it to be in good agreement with experiment.…”

Section: Experiments and Discussionmentioning

confidence: 62%

“…The opposite end (i.e. 1.3 μm port of WDM) was terminated by a Sagnac fiber-loop mirror that allows one to reduce the generation threshold by a factor of 2 as compared with the random DFB fiber laser configuration without mirror [2].…”

Section: Experiments and Discussionmentioning

confidence: 99%

“…Since its first demonstration [1], random fiber lasers based on distributed feedback (DFB) provided by Rayleigh scattering (RS) and distributed gain provided by stimulated Raman scattering (SRS) have proven to possess a lot of attractive features [2]. Recently is has been pointed out that that the total efficiency of a random DFB fiber laser with co-directional pumping has exponential dependence on fiber length that is defined by linear attenuation of pump and laser light in the fiber [3][4].…”

Section: Introductionmentioning

confidence: 99%

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Random distributed feedback fiber laser of ultimate efficiency

et al. 2014

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Section: Experiments and Discussionmentioning

confidence: 62%

Section: Experiments and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Random distributed feedback fiber laser of ultimate efficiency

et al. 2014

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“…In recent years they have attracted a great deal of attention, mainly due to the versatility stemming from cavity-less geometries and the ease of realization [1][2][3][4][5][6][7][8][9]. In liquid crystals, suitable dopants can provide the gain action through optical pumping, while optical birefringence in conjunction with intense fluctuations of the dielectric tensor yield the required recurrent multiple scattering for random resonances to occur [10][11][12][13][14][15][16][17].…”

mentioning

confidence: 99%

Soliton-assisted random lasing in optically-pumped liquid crystals

Perumbilavil

Piccardi

Buchnev

et al. 2016

Applied Physics Letters

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We demonstrate a novel random laser configuration by exploiting the coexistence of optical gain and light self-localization in a reorientational nonlinear medium. A spatial soliton launched by a near-infrared beam in dye-doped nematic liquid crystals enhances and confines stimulated emission of visible light in the optically-pumped gain-medium, yielding random lasing with enhanced features.In random lasers, a disordered distribution of scattering centers provides the required feedback for oscillations in optically amplifying media. In recent years they have attracted a great deal of attention, mainly due to the versatility stemming from cavity-less geometries and the ease of realization [1][2][3][4][5][6][7][8][9]. In liquid crystals, suitable dopants can provide the gain action through optical pumping, while optical birefringence in conjunction with intense fluctuations of the dielectric tensor yield the required recurrent multiple scattering for random resonances to occur [10][11][12][13][14][15][16][17]. In the nematic phase, moreover, liquid crystals are positive uniaxial materials subject to optic axis reorientation under the action of electric fields, either at low or optical frequencies [18]. The latter response provides a low-power mechanism for nonlinear optics [19] and light localization into self-confined lightbeams, the so-called "nematicons" [20]. Nematicons are bright spatial solitons (solitary waves) which are stable in two transverse dimensions due to the nonlocal response associated with the elastic intermolecular links in the liquid state [21,22]; they support graded-index waveguides able to confine additional (incoherent) signals/beams of different wavelengths as well as powers and profiles [23][24][25][26][27][28][29][30], are robust against refractive index perturbations [31-35] and collisional interactions [36][37][38]. Aided by nematicons, reorientational and electronic nonlinear responses, characterized by distinct time-and power-scales, can synergystically be combined [39,40]. Owing to their large numerical aperture [41], nematicon waveguides solitons have also been employed in experiments involving incoherent light generation by fluorescence [42] or amplified spontaneous emission [43], offering a means to better collect and couple the emitted light into optical fibers.In this Letter we demonstrate a novel example of synergy between diverse nonlinear responses: the combination of spatial solitons and random lasing into a "nematicon random laser", whereby a low-power self-confined beam provides a guided-wave landscape for the stimu- * assanto@uniroma3.it lated emission induced by collinear optical pumping of dye-doped nematic liquid crystals (NLC).Several benefits can be expected from adopting such light-induced guided-wave configuration for random lasing. At variance with standard thin film geometries, the thick NLC cell provides an extended volume where optical pumping can produce fluorescence and, in turn, stimulated emission and lasing action via random scattering and feedback. The la...

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“…RFLs have been realized using Er-doped fiber gain, Raman gain, and Brillouin gain with random feedback induced by Rayleigh scattering, [16][17][18][19][20][21] or artificially induced randomness such as a photonic crystal fiber filled with a suspension structure, 22 Bragg gratings in rare-earth doped fiber, 23 and polymer optical fiber. 24 Either in-coherent or coherent lasing outputs have been observed in these random lasing systems, with lasing spectra of bell-shaped peaks as broad as terahertz level 25 or even narrow spikes as sharp as sub-kilohertz. 26,27 RFLs based on the Raman gain has been widely used in many fields, including providing the distributed Raman amplification with lower effective noise and good stability in telecommunication applications, 28 systems up to 300km, 30,31 and extending the sensing range in the distributed sensing systems.…”

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confidence: 99%

Multi-parameter sensor based on random fiber lasers

Zhang

Lü

et al. 2016

AIP Advances

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We demonstrate a concept of utilizing random fiber lasers to achieve multi-parameter sensing. The proposed random fiber ring laser consists of an erbium-doped fiber as the gain medium and a random fiber grating as the feedback. The random feedback is effectively realized by a large number of reflections from around 50000 femtosecond laser induced refractive index modulation regions over a 10cm standard single mode fiber. Numerous polarization-dependent spectral filters are formed and superimposed to provide multiple lasing lines with high signal-to-noise ratio up to 40dB, which gives an access for a high-fidelity multi-parameter sensing scheme. The number of sensing parameters can be controlled by the number of the lasing lines via input polarizations and wavelength shifts of each peak can be explored for the simultaneous multi-parameter sensing with one sensing probe. In addition, the random grating induced coupling between core and cladding modes can be potentially used for liquid medical sample sensing in medical diagnostics, biology and remote sensing in hostile environments.

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Random distributed feedback fibre lasers

Cited by 340 publications

References 378 publications

Random distributed feedback fiber laser of ultimate efficiency

Random distributed feedback fiber laser of ultimate efficiency

Soliton-assisted random lasing in optically-pumped liquid crystals

Multi-parameter sensor based on random fiber lasers

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