Experimental and theoretical study of longitudinal power distribution in a random DFB fiber laser

Churkin, Dmitry V.; El-Taher, Atalla; Vatnik, Ilya D.; Ania-Castañón, Juan Diego; Harper, Paul; Podivilov, E. V.; Babin, Sergey A.; Turitsyn, Sergei K.

doi:10.1364/oe.20.011178

Cited by 64 publications

(35 citation statements)

References 23 publications

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“…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]. So, decreasing of the cavity length may sufficiently enhance the laser efficiency, but the threshold pump power will be increased too.…”

Section: Introductionmentioning

confidence: 99%

Random distributed feedback fiber laser of ultimate efficiency

et al. 2014

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Section: Introductionmentioning

confidence: 99%

Random distributed feedback fiber laser of ultimate efficiency

et al. 2014

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“…It was proved that power balance model describes well distributions of the generated power 26,31 . Note that in the model (1) the generation wave is assumed to be a single-frequency radiation having a wavelength corresponding to the maximum Raman gain.…”

Section: Spectral Balance Modelmentioning

confidence: 98%

“…To calculate spectral shape of the generation within balance approach, we have changed well-known power balance equation set describing power transfer from the pump to the Stokes waves 10,26,41 . This model takes into consideration power income to the Stokes wave due to Raman amplification, outgo from the pump wave known as depletion, linear losses every optical fiber possesses, and Rayleigh backscattering process which mixes Stokes waves propagating in different directions:…”

Section: Spectral Balance Modelmentioning

confidence: 99%

“…Up to date, a number of different schemes of random DFB fiber lasers were demonstrated [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] . Namely, random DFB fiber lasers can operate in different spectral bands 12,13 , emit higher order Stokes waves [12][13][14] , be tunable 22,23 and multiwavelength 15,19,21 .…”

Section: Introductionmentioning

confidence: 99%

“…The simplest model is the power balance model 10,26 which describes well the average power performances such as the generation threshold 10 , the output power value, the longitudinal distribution of the power 26 and can be used to perform a laser optimization 31 . To deal with spectral and temporal properties of the laser radiation, NLSE-based model usually used 32 .…”

Section: Introductionmentioning

confidence: 99%

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Modeling of the spectrum in a random distributed feedback fiber laser within the power balance modes

Vatnik

Churkin

2014

Laser Sources and Applications II

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The simplest model for a description of the random distributed feedback (RDFB) Raman fiber laser is a power balance model describing the evolution of the intensities of the waves over the fiber length. The model predicts well the power performances of the RDFB fiber laser including the generation threshold, the output power and pump and generation wave intensity distributions along the fiber. In the present work, we extend the power balance model and modify equations in such a way that they describe now frequency dependent spectral power density instead of integral over the spectrum intensities. We calculate the generation spectrum by using the depleted pump wave longitudinal distribution derived from the conventional power balance model. We found the spectral balance model to be sufficient to account for the spectral narrowing in the RDFB laser above the threshold of the generation.

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Experimental and Theoretical Investigation of the Polymer Optical Fiber Random Laser with Resonant Feedback

Chan

Cheng

et al. 2018

Advanced Optical Materials

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demonstration of RFL by inserting TiO 2 particles and rhodamine 6G dyes into the hollow core of a photonic crystal fiber, which opened the research field of RFLs. [15] Subsequently, both coherent and incoherent RFLs based on various fiber structures have been demonstrated. [16][17][18] These RFLs have several merits like low threshold, directional output, and low-cost fabrication, indicating that they are superior to other conventional RLs in some applications. [16] According to the feedback mechanism, RFLs can be generally classified into two categories: (1) RFLs based on common single mode fibers with the feedback provided by Rayleigh scattering and Raman effect, [19][20][21][22][23][24][25] (2) RFLs based on specific fibers (e.g., liquid core optical fibers, polymer optical fibers, and erbium-doped fibers) with the feedback provided by doped particles or randomly distributed Bragg gratings. [16,[26][27][28][29][30][31] For the first type of RFLs, their length are normally more than several kilometers, which limits their applications. [18] Conversely, the size of the second type of RFLs is in the centimeter scale. [26] Moreover, the properties of the second type of RFLs (e.g., shape, size, lasing wavelength, and laser threshold) could be tuned via controlling the fiber materials, scatterers, and optical gain medium. [27,28,32] As a result, the second type of RFLs can be regarded as ideal experimental systems for the investigation of random lasing with novel materials (like plasmonic materials), which have already been reported in several studies. [17,33,34] However, these studies mainly focus on experimental studies and corresponding theoretical models are still lacking to date. There is a need to find an effective numerical model to describe the lasing dynamic in the RFLs. Moreover, although RFLs have great potential in various applications, no practical application has been reported in the past studies.In the present work, we have demonstrated polymer optical fiber RLs (POFRLs) by doping TiO 2 nanoparticles and Rh640 perchlorate dyes into the core of the POFs. The optical gain in our POFRL was provided by Rh640 perchlorate dyes which are widely used organic luminescent dyes for many dye laser systems. The TiO 2 nanoparticles worked as scatterers to provide multiscattering events for light propagation and the resulting scattering strength is in the weakly scattering regime (scattering mean free path l s ≫ emission wavelength λ). Multimode and coherent random lasing was observed in our POFRLs, which 1D random fiber laser is a novel fiber-based laser, which exhibits many unique optical properties and shows great promise for various applications including speckle-free imaging. A multimode and coherent polymer optical fiber random laser (POFRL) is successfully fabricated by doping TiO 2 nanoparticles and Rh640 perchlorate dyes in the core of a polymer optical fiber (POF). The waveguide effect provided by the POF greatly increases the multiscattering events for light propagation and results in laser cavity with muc...

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Experimental and theoretical study of longitudinal power distribution in a random DFB fiber laser

Cited by 64 publications

References 23 publications

Random distributed feedback fiber laser of ultimate efficiency

Random distributed feedback fiber laser of ultimate efficiency

Modeling of the spectrum in a random distributed feedback fiber laser within the power balance modes

Experimental and Theoretical Investigation of the Polymer Optical Fiber Random Laser with Resonant Feedback

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