Tapered tellurite step-index optical fiber for coherent near-to-mid-IR supercontinuum generation: experiment and modeling

Saini, Than Singh; Hoa, Nguyen Phuoc Trung; Tuan, Tong Hoang; Luo, Xing; Suzuki, Takenobu; Ohishi, Yasutake

doi:10.1364/ao.58.000415

Cited by 32 publications

(12 citation statements)

References 44 publications

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“…The transmission range of the ZnSe lens was 0.6-21.0 µm. The signal received from the monochromator was amplified using a lock-in-amplifier (NF LI5640) [34][35][36] . Finally, the supercontinuum spectrum was recorded using a computer based spectrometer system.…”

Section: Fiber Fabricationmentioning

confidence: 99%

“…The optical noise generated by the nonlinear processes (such as modulation instability and the soliton fission) is completely absent in the case of ANDi engineered fibers pumped with femtosecond laser pulses 26 33 . Our group has demonstrated coherent mid-IR supercontinuum generation in step-index tellurite, tapered tellurite, and chalcogenide double clad optical fibers pumped with femtosecond laser system [34][35][36] . Among all the fibers, the chalcogenide glass fibers are much suitable candidate for mid-IR supercontinuum applications.…”

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confidence: 99%

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Coherent Mid-IR Supercontinuum Generation using Tapered Chalcogenide Step-Index Optical Fiber: Experiment and modelling

Saini

Tuan

Suzuki

et al. 2020

Sci Rep

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Mid-infrared region of electromagnetic spectrum has increased a lot of scientific and technical interest because of its utility to figure out the molecular fingerprints. Current mid-infrared light sources including quantum cascade lasers, thermal-emitters, and synchrotron radiation are not suitable for various potential applications where we require coherent, portable and broadband light sources. During the current decade, several efforts have been put forwarded to extend the spectral range of the supercontinuum. However, the coherent mid-infrared supercontinuum spectrum in the mid-infrared region has been demonstrated rarely. Here, we demonstrate a coherent mid-infrared supercontinuum using a tapered chalcogenide fiber pumped at various wavelength ranging from 2 µm to 2.6 µm. Experimental observations show that the supercontinuum spectrum extending from ~1.6 µm to 3.7 µm can be achieved using a 3 cm long tapered chalcogenide step-index optical fiber pumped with femtosecond laser pulses at 2.6 µm. To the best of our knowledge, using short pump wavelengths at 2 µm to 2.6 µm in an all-normal dispersion engineered chalcogenide glass fiber, the coherent supercontinuum spectrum has been reported first time. Such coherent broadband light source has its key prominence for the various prospective applications in the fields of bio-medical, sensing, and multiplex coherent anti-Stokes Raman scattering microspectroscopy.

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Section: Fiber Fabricationmentioning

confidence: 99%

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confidence: 99%

Coherent Mid-IR Supercontinuum Generation using Tapered Chalcogenide Step-Index Optical Fiber: Experiment and modelling

Saini

Tuan

Suzuki

et al. 2020

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“…Typically, mid-IR MFs are fabricated from a category of mid-IR-transparent materials, including oxide glasses (e.g., germanates [24], fluorotellurites [25] and tellurites [26]), fluoride glasses (ZBLAN) [27,28], chalcogenide glasses (ChGs, glasses containing one or more chalcogens: sulfur (S), selenium (Se) and tellurium (Te)) [29][30][31], as well as semiconductors (e.g., cadmium telluride (CdTe) and [32] silicon (Si) [33]). Among these materials, ChGs are mostly investigated for their special merits, including broadband intrinsic transparency (0.5-25 µm), high optical nonlinearity (about 100-1000 times larger than that of silica glass) and hospitality to rare-earth dopants [29,34,35].…”

Section: Introductionmentioning

confidence: 99%

Chalcogenide Glass Microfibers for Mid-Infrared Optics

et al. 2021

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With diameters close to the wavelength of the guided light, optical microfibers (MFs) can guide light with tight optical confinement, strong evanescent fields and manageable waveguide dispersion and have been widely investigated in the past decades for a variety of applications. Compared to silica MFs, which are ideal for working in visible and near-infrared regions, chalcogenide glass (ChG) MFs are promising for mid-infrared (mid-IR) optics, owing to their easy fabrication, broad-band transparency and high nonlinearity, and have been attracting increasing attention in applications ranging from near-field coupling and molecular sensing to nonlinear optics. Here, we review this emerging field, mainly based on its progress in the last decade. Starting from the high-temperature taper drawing technique for MF fabrication, we introduce basic mid-IR waveguiding properties of typical ChG MFs made of As2S3 and As2Se3. Then, we focus on ChG-MF-based passive optical devices, including optical couplers, resonators and gratings and active and nonlinear applications of ChG MFs for mid-IR Raman lasers, frequency combs and supercontinuum (SC) generation. MF-based spectroscopy and chemical/biological sensors are also introduced. Finally, we conclude the review with a brief summary and an outlook on future challenges and opportunities of ChG MFs.

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“…In the former case, the all-normal dispersion fibers were demonstrated experimentally using the air-silica photonic crystal fibers (PCFs) [4][5][6][7][8][9][10][11][12], or proposed in a numerical study of the heavily germanium-doped silica fiber [13]. The nonlinear parameter of the fiber can be enhanced further for the all-solid soft glass PCF [14][15][16], air-tellurite PCFs [17], tapered tellurite step-index optical fiber [18], As2Se3 chalcogenide glass triangular-core graded-index PCF [19] and hollow-core silica fibers filled with highly nonlinear liquids such as carbon disulfide (CS2) [20][21][22][23][24][25] and chloroform (CHCl3) [26]. In the latter case, the SCG covering from 1064 to beyond 1700 nm with 70-W average output power was demonstrated experimentally using a nonlinear ytterbium-doped fiber amplifier with all-normal dispersion [27].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of the CS₂-Filled Active Fiber With Flattened All-Normal Dispersion

et al. 2021

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Tapered tellurite step-index optical fiber for coherent near-to-mid-IR supercontinuum generation: experiment and modeling

Cited by 32 publications

References 44 publications

Coherent Mid-IR Supercontinuum Generation using Tapered Chalcogenide Step-Index Optical Fiber: Experiment and modelling

Coherent Mid-IR Supercontinuum Generation using Tapered Chalcogenide Step-Index Optical Fiber: Experiment and modelling

Chalcogenide Glass Microfibers for Mid-Infrared Optics

Numerical Simulation of the CS₂-Filled Active Fiber With Flattened All-Normal Dispersion

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Tapered tellurite step-index optical fiber for coherent near-to-mid-IR supercontinuum generation: experiment and modeling

Cited by 32 publications

References 44 publications

Coherent Mid-IR Supercontinuum Generation using Tapered Chalcogenide Step-Index Optical Fiber: Experiment and modelling

Coherent Mid-IR Supercontinuum Generation using Tapered Chalcogenide Step-Index Optical Fiber: Experiment and modelling

Chalcogenide Glass Microfibers for Mid-Infrared Optics

Numerical Simulation of the CS2-Filled Active Fiber With Flattened All-Normal Dispersion

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Numerical Simulation of the CS₂-Filled Active Fiber With Flattened All-Normal Dispersion