Probing the dispersive properties of optical fibers with an array of femtosecond-written fiber Bragg gratings

Boilard, Tommy; Vallée, Réal; Bernier, Martin

doi:10.1038/s41598-022-08329-3

Cited by 8 publications

(3 citation statements)

References 28 publications

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“…14 a. The dispersion parameters were obtained from a recent experimental characterization of the 7.5 µm indium fluoride fiber based on the use of an array of fiber Bragg gratings 42 and shown in Fig. 14 b.…”

Section: Methodsmentioning

confidence: 99%

Femtosecond tunable solitons up to 4.8 µm using soliton self-frequency shift in an InF3 fiber

Gauthier

Olivier

Paradis

et al. 2022

Sci Rep

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A tunable ultrashort soliton pulse source reaching up to 4.8 µm is demonstrated based on a 2.8 µm femtosecond fiber laser coupled to a zirconium fluoride fiber amplifier followed by a small core indium fluoride fiber. This demonstration is extending by 300 nm the long wavelength limit previously reported with soliton self-frequency shift (SSFS) sources based on fluoride fibers. Our experimental and numerical investigation highlighted the spectral dynamics associated with the generation of highly redshifted pulses in the mid-infrared using SSFS enhanced by soliton fission. This study is intended at providing a better understanding of the potential and limitations of SSFS based tunable femtosecond fiber sources in the 3–5 µm spectral range.

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Section: Methodsmentioning

confidence: 99%

Femtosecond tunable solitons up to 4.8 µm using soliton self-frequency shift in an InF3 fiber

Gauthier

Olivier

Paradis

et al. 2022

Sci Rep

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“…These theoretical calculations were performed by calculating the propagation time of the short and long wavelength edges of the FWHM of the pulse through the fiber based on the simulated dispersion (reported in Figure 2 c,d) for the ARF and in Ref. [ 49 ] for the SCF. These calculated data are presented in Table 1 b, and show that the SCF would be suitable for the propagation of a longer duration (>1 ps) pulse, but its dispersion is such that the propagation of <1 ps pulses in this fiber type is impossible without additional dispersion management or pulse recompression.…”

Section: Dispersionmentioning

confidence: 99%

Double-Clad Antiresonant Hollow-Core Fiber and Its Comparison with Other Fibers for Multiphoton Micro-Endoscopy

Szwaj,

Davidson,

Johnson

et al. 2024

Sensors

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Label-free and multiphoton micro-endoscopy can transform clinical histopathology by providing an in situ tool for diagnostic imaging and surgical treatment in diseases such as cancer. Key to a multiphoton imaging-based micro-endoscopic device is the optical fiber, for distortion-free and efficient delivery of ultra-short laser pulses to the sample and effective signal collection. In this work, we study a new hollow-core (air-filled) double-clad anti-resonant fiber (DC-ARF) as a high-performance candidate for multiphoton micro-endoscopy. We compare the fiber characteristics of the DC-ARF with a single-clad anti-resonant fiber (SC-ARF) and a solid core fiber (SCF). In this work, while the DC-ARF and the SC-ARF enable low-loss (<0.2 dBm−1), close to dispersion-free excitation pulse delivery (<10% pulse width increase at 900 nm per 1 m fiber) without any induced non-linearities, the SCF resulted in spectral broadening and pulse-stretching (>2000% of pulse width increase at 900 nm per 1 m fiber). An ideal optical fiber endoscope needs to be several meters long and should enable both excitation and collection through the fiber. Therefore, we performed multiphoton imaging on endoscopy-compatible 1 m and 3 m lengths of fiber in the back-scattered geometry, wherein the signals were collected either directly (non-descanned detection) or through the fiber (descanned detection). Second harmonic images were collected from barium titanate crystals as well as from biological samples (mouse tail tendon). In non-descanned detection conditions, the ARFs outperformed the SCF by up to 10 times in terms of signal-to-noise ratio of images. Significantly, only the DC-ARF, due to its high numerical aperture (NA) of 0.45 and wide-collection bandwidth (>1 µm), could provide images in the de-scanned detection configuration desirable for endoscopy. Thus, our systematic characterization and comparison of different optical fibers under different image collection configurations, confirms and establishes the utility of DC-ARFs for high-performing label-free multiphoton imaging-based micro-endoscopy.

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“…For the InF 3 fiber, the losses as a function of wavelength were provided by Le Verre Fluoré and are shown in figure 14a. The dispersion parameters were obtained from a recent experimental characterization of the 7.5 µm indium fluoride fiber based on the use of an array of fiber Bragg gratings 36 and shown in figure 14b. The nonlinear index is assumed to be n 2 = 4.0 × 10 −16 cm 2 /W, lower than the bulk value of 4.3 × 10 −16 cm 2 /W given by Basaldua et al 37 The standard procedure was used to obtain the Raman transfer function.…”

Section: Simulation Modelmentioning

confidence: 99%

Femtosecond tunable solitons up to 4.8 µm using soliton self-frequency shift in an InF3 fiber.

Gauthier

Olivier

Paradis

et al. 2022

Preprint

Self Cite

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A tunable ultrashort soliton pulse source reaching up to 4.8 µm is demonstrated based on a 2.8 µm femtosecond fiber lasercoupled to a zirconium fluoride fiber amplifier followed by a small core indium fluoride fiber.This demonstration is extendingby 500 nm the long wavelength limit previously reported with soliton self-frequency shift (SSFS) sources based on fluoridefibers. Our experimental and numerical investigation highlighted the spectral dynamics associated with the generation of highlyredshifted pulses in the MIR using SSFS enhanced by soliton fission. This study is intended at providing a better understandingof the potential and limitations of SSFS based tunable femtosecond fiber sources in the 3-5 µm spectral range.

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Probing the dispersive properties of optical fibers with an array of femtosecond-written fiber Bragg gratings

Cited by 8 publications

References 28 publications

Femtosecond tunable solitons up to 4.8 µm using soliton self-frequency shift in an InF3 fiber

Femtosecond tunable solitons up to 4.8 µm using soliton self-frequency shift in an InF3 fiber

Double-Clad Antiresonant Hollow-Core Fiber and Its Comparison with Other Fibers for Multiphoton Micro-Endoscopy

Femtosecond tunable solitons up to 4.8 µm using soliton self-frequency shift in an InF3 fiber.

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