FBG array-based random distributed feedback Raman fibre laser

Skvortsov, M. A.; Abdullina, S. R.; Vlasov, A. S.; Zlobina, Ekaterina A.; Lobach, Ivan A.; Terentyev, V. S.; Babin, Sergey A.

doi:10.1070/qel16421

Cited by 11 publications

(9 citation statements)

References 17 publications

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“…Unlike Rayleigh backscattering-based random RFLs [1], the transmitted pump power continues to grow after reaching the threshold, which may be related to another type of distributed feedback. The output generation power at the maximum pump power (14 W) amounts to about 3 W for both forward and backward Stokes waves, with slightly higher backward power, whereas in [12] forward Stokes power was 5 times less than backward one because of significantly higher losses for pump and Stokes waves in the longer array. The total output power (about 6 W) is higher than that obtained in [12].…”

Section: Resultsmentioning

confidence: 96%

“…The measured widths of reflection spectrum for the single FBG and FBG array are about 30 and 100 pm, respectively; see figure 2(c). The broadening of the array spectrum could be related to the slightly different conditions (such as fiber tension or stand vibration) at the inscription of a large amount of FBGs by the UV beam through the phase mask with the fiber translation by ~20 cm between each FBG exposition; see [12] for details.…”

Section: Experimental Schemementioning

confidence: 99%

“…In paper [12] another scheme of a Raman fiber laser with RDFB based on FBG array inscribed in a 13 m long polarization-maintaining (PM) passive fiber Fujikura SM98-PS-U25D is proposed. The array consists of fifty-seven 4 cm long FBGs spaced at ~20 cm with nearly the same Bragg wavelength (λ Br ~ 1092 nm), but with different relative phases and amplitudes.…”

Section: Introductionmentioning

confidence: 99%

“…Here we optimize the structure of the random fiber laser proposed in [12] in terms of losses and number of gratings in the array. In addition, we analyze in detail the possibilities of the coherent operation of such a laser.…”

Section: Introductionmentioning

confidence: 99%

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Coherent Raman lasing in a short polarization-maintaining fiber with a random fiber Bragg grating array

et al. 2019

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We study Raman lasing in a 7 m polarization-maintaining fiber with an array of fiber Bragg gratings with random phases/amplitudes. After optimization of the grating number the threshold pump power decreases to 0.8 W, whereas generated Stokes power at 1092 nm grows linearly above the threshold, reaching ~3 W for both forward and backward waves. A comparison of experimental data with a developed model shows what such a random laser generates in a coherent regime. Near the threshold, single-longitudinal-mode generation with a ~50 kHz linewidth is obtained, whereas the number of generated modes grows with power exceeding ~100 at ~0.1 W. At higher power, a transition to an incoherent regime with different power increments is observed, while the linewidth grows nonlinearly reaching ~80 pm. Insertion of a 30 m fiber before gratings enables ~1.5 times higher backward Stokes power at a narrower linewidth. Additionally, tunable parametric generation around 1140 nm is observed.

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Section: Resultsmentioning

confidence: 96%

Section: Experimental Schemementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Coherent Raman lasing in a short polarization-maintaining fiber with a random fiber Bragg grating array

et al. 2019

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“…Это приводит к тому, что резонаторы случайных лазеров строятся с использованием длинных (1-100 км) ОВ. Современные тенденции случайных волоконных лазеров связаны с переходом к лазерам с резонатором [4] на основе коротких искусственных рэлеевских оптических волокон (ОВ, содержащих массив волоконных брэгговских решёток -ВБР) [5].…”

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