Pulse and spectral responses of laser-excited twisted silica few-mode optical fiber with improved height of quasi-step refractive index profile

Bourdine, Anton V.; Dashkov, Michael V.; Kuznetsov, Artem A.; Demidov, Vladimir V.; Evtushenko, Alexander S.; Barashkin, Alexey Yu.; Ter-Nersesyants, Egishe V.; Vasilets, Alexander A.; Morozov, Oleg G.; Burdin, Vladimir A.; Дукельский, К. В.; Sakhabutdinov, A. Zh.; Zaitseva, Elena S.; Gizatulin, Azat R.; Meshkov, Ivan K.; Dmitriev, Eugeniy V.; Ismail, Yaseera; Petruccione, Francesco; Singh, Ghanshyam; Tiwari, Manish K.; Yin, Juan

doi:10.1117/12.2637910

Cited by 4 publications

(6 citation statements)

References 11 publications

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“…To implement fabrication of twisted optical fibers, we utilized the technique, presented in work 81 , which is based on preform rotation during the optical fiber drawing. For this purpose, first of all, the motor was installed to the feed unit of tower (in the first stage of modification it was stepper, while further in the final configuration it was replaced by commutator motor), that added the rotation option to the drawing system [82][83][84] with rotation speed up to 2000 revolutions per minute. Because MOF / PCF structure contains air holes (that provide features, much differing from properties of typical telecommunication optical fibers), special matching system was developed, fabricated and installed on the drawing tower to feed excess pressure feeding to the MOF cane for control and management of capillary size under cane rotation during MOF drawing process 85,86 .…”

Section: Twisted 6-geo2-doped Core Silica Mofmentioning

confidence: 99%

“…G.652 91 ), jointed to tested optical fiber at the start of measurements centrally and further under precision specified radial offset with respect to core center. Here we utilized based on stroboscopic effect DMD analyzer workstation R2D2 lab kit 83,86,[92][93][94][95] for laser-excited optical pulse response measurement under desired precision offset launching conditions after propagation over tested fiber optic link, containing ~500 m long MMF and researched 2 m long silica 6-core MOF with graded refractive index profile of cores and induced twisting 100 rpm. R2D2 transmitter unit is based on Fabry-Perot laser diode (FP LD), that generates quasi-Gaussian optical pulse at wavelength =1310 nm with width at a half maximum (FWHM) ~340 ps.…”

Section: Dmd Map Measurement Of Twisted 6-geo2-doped Core Mofmentioning

confidence: 99%

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Experimental researches and testing of silica twisted six-GeO2-doped core microstructured optical fiber. Part I: fusion splicing with telecommunication optical fibers and differential mode delay map measurements

Bourdine,

Dashkov,

Evtushenko

et al. 2023

Optical Technologies for Telecommunications 2022

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This work presents results of test series, performed for earlier on designed and successfully fabricated silica few-mode microstructured optical fibers (MOF) with six GeO2-doped cores, induced twisting 100 revolutions per meter, typical "telecommunication" outer diameter 125 µm, core diameter 8.7 µm, air hole diameter 4.6 µm, pitch 7.2 µm, and core quasi-step / graded refractive index profiles with height 0.0360 / 0.0275, respectively. Part I introduces attempts for *

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Section: Twisted 6-geo2-doped Core Silica Mofmentioning

confidence: 99%

Section: Dmd Map Measurement Of Twisted 6-geo2-doped Core Mofmentioning

confidence: 99%

Experimental researches and testing of silica twisted six-GeO2-doped core microstructured optical fiber. Part I: fusion splicing with telecommunication optical fibers and differential mode delay map measurements

Bourdine,

Dashkov,

Evtushenko

et al. 2023

Optical Technologies for Telecommunications 2022

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show abstract

“…Earlier on [29][30][31][32][33] we discussed technological issues of drawing tower modifications to provide fabrication of optical fibers with induced twisting. Here we utilized the same technique, proposed in work 34 , which is based on preform rotation during the drawing.…”

Section: Drawing Of Microstrucured Optical Fibers With Improved Twistingmentioning

confidence: 99%

“…As a result, it provided successfully fabrication a set of pilot lengths of silica few-mode optical fibers with improved height of GeO2-doped quasi-step refractive index profile, weakly induced twisting 10 and 66 revolutions per meter (rpm). These manufactured few-mode optical fibers 29,30 have typical "telecommunication" structure: GeO2-doped core with diameter 11 µm, bounded by one outer solid silica cladding with "telecommunication" diameter 125 µm. MOF / PCF structure is strongly more complicated, in comparison with conventional telecommunication optical fibers.…”

Section: Drawing Of Microstrucured Optical Fibers With Improved Twistingmentioning

confidence: 99%

Silica microstructured optical fiber with centralized inclusion of seven GeO2-doped capillaries and induced twisting. Part I: fabrication of pilot samples

Bourdine,

Demidov,

Ter-Nersesyants

et al. 2023

Optical Technologies for Telecommunications 2022

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This work introduces first time fabricated spun silica microstructured optical fiber (MOF) with inclusion of seven GeO2doped capillaries, placed in the central part of MOF cross-section, and induced twisting up to 730 revolutions per meter. Part I discusses technological issues for manufacturing of described complicated twisted fiber optic structure, while Part II presents some results of test series, performed for successfully manufactured twisted MOF pilot samples with typical hexagonal geometry under hole radius 4.40 µm and pitch 9.80 µm, outer "telecommunication" diameter 125 µm, and center part, formed by seven hollow GeO2-doped ring cores with inner radius 2.50 µm, pitch 8.80 µm and refractive index difference n=0.030. Following measurements were performed: measurements of transmission spectra under various twisting order, far-field laser beam profiles, some attempts of fusion splicing of typical telecommunication optical fibers and fabricated MOF with insertion loss estimation, and spectral response measurements of both single and group WDM (Wavelength Division Multiplexing)-channels of commercially available telecom WDM-system under inclusion of 2 m length MOF into various spans of short-range lab fiber optic link.

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“…In previously published papers [84][85][86][87][88][89][90], we described in detail all previous successfully performed stages of drawing the tower modifications that provide improvements to the twisting of the fabricated MOF from the initial weak 10 revolutions per meter (rpm) up to 66 rpm [84,85], and then further 100, 400, and 500 rpm [89,90]. We chose to develop the method proposed in [1]: the rotation of the optical fiber preformed during the drawing process.…”

Section: Fabrication Of Silica Microstructured Optical Fibers With Im...mentioning

confidence: 99%

Twisted Silica Few-Mode Hollow GeO2-Doped Ring-Core Microstructured Optical Fiber

et al. 2023

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This work presents the first instance of a silica few-mode microstructured optical fiber (MOF) being successfully fabricated with a hollow GeO2-doped ring core and by strongly inducing twisting up to 790 revolutions per meter. Some technological issues that occurred during the manufacturing of the GeO2-doped supporting elements for the large hollow cores are also described, which complicated the spinning of the MOFs discussed above. We also provide the results of the tests performed for the pilot samples—designed and manufactured using the untwisted and twisted MOFs described above—which were characterized by an outer diameter of 65 µm, a hollow ring core with an inner diameter of 30.5 µm, under a wall thickness of 1.7 µm, and a refractive index difference of Δn = 0.030. Moreover, their geometrical parameters, basic transmission characteristics, and the measurements of the far-field laser beam profile patterns are also provided.

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Pulse and spectral responses of laser-excited twisted silica few-mode optical fiber with improved height of quasi-step refractive index profile

Cited by 4 publications

References 11 publications

Experimental researches and testing of silica twisted six-GeO2-doped core microstructured optical fiber. Part I: fusion splicing with telecommunication optical fibers and differential mode delay map measurements

Experimental researches and testing of silica twisted six-GeO2-doped core microstructured optical fiber. Part I: fusion splicing with telecommunication optical fibers and differential mode delay map measurements

Silica microstructured optical fiber with centralized inclusion of seven GeO2-doped capillaries and induced twisting. Part I: fabrication of pilot samples

Twisted Silica Few-Mode Hollow GeO2-Doped Ring-Core Microstructured Optical Fiber

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