Compact all-fiber source of coherent linearly polarized octave-spanning supercontinuum based on normal dispersion silica fiber

Tarnowski, Karol; Martynkien, Tadeusz; Mergo, Paweł; Sotor, Jarosław; Soboń, Grzegorz

doi:10.1038/s41598-019-48726-9

Cited by 34 publications

(21 citation statements)

References 29 publications

(45 reference statements)

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“…Hence, our work paves the way for the construction of next generation ultra-low noise high power ultrashort pulse amplifiers and frequency combs practically free of excess noise by simply replacing all the fibers in our system with their corresponding PM version. Since PM ANDi fibers and corresponding SC sources are now available 43,44 , this is a straightforward task. Indeed, our preliminary tests with a PM ANDi SC source and an all-PM chirped pulse amplification system indicate that the RIN after the amplifier is very close to the RIN of the Er-fiber seed system 45 .…”

Section: Discussionmentioning

confidence: 99%

Low noise all-fiber amplification of a coherent supercontinuum at 2 µm and its limits imposed by polarization noise

Heidt

Hodasi

Rampur

et al. 2020

Sci Rep

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We report a low noise, broadband, ultrafast Thulium/Holmium co-doped all-fiber chirped pulse amplifier, seeded by an Erbium-fiber system spectrally broadened via coherent supercontinuum generation in an all-normal dispersion photonic crystal fiber. The amplifier supports a − 20 dB bandwidth of more than 300 nm and delivers high quality 66 fs pulses with more than 70 kW peak power directly from the output fiber. The total relative intensity noise (RIN) integrated from 10 Hz to 20 MHz is 0.07%, which to our knowledge is the lowest reported RIN for wideband ultrafast amplifiers operating at 2 µm to date. This is achieved by eliminating noise-sensitive anomalous dispersion nonlinear dynamics from the spectral broadening stage. In addition, we identify the origin of the remaining excess RIN as polarization modulational instability (PMI), and propose a route towards complete elimination of this excess noise. Hence, our work paves the way for a next generation of ultra-low noise frequency combs and ultrashort pulse sources in the 2 µm spectral region that rival or even outperform the excellent noise characteristics of Erbium-fiber technology.

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Section: Discussionmentioning

confidence: 99%

Low noise all-fiber amplification of a coherent supercontinuum at 2 µm and its limits imposed by polarization noise

Heidt

Hodasi

Rampur

et al. 2020

Sci Rep

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“…in nonlinear bio-photonic imaging, ultrafast spectroscopy, coherent X-ray generation, attoscience, and low-noise ultrafast fiber laser development, with spectral coverage extending from UV to mid-IR wavelengths. [11][12][13][14][15][16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Noise amplification in all-normal dispersion fiber supercontinuum generation and its impact on ultrafast photonics applications

Sierro¹,

Heidt²

2020

OSA Continuum

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Highly coherent and low-noise supercontinuum (SC) sources based on nonlinear spectral broadening of femtosecond pulses in all-normal dispersion (ANDi) fibers are attractive for many applications in ultrafast photonics. By simulating a real nonlinear pulse compression experiment, we numerically investigate the impact of shot noise and technical pump laser fluctuations on the quality and stability of single-cycle pulse generation and other multi-shot experiments based on the manipulation of the SC spectral phase. We find that for pump pulse durations of less than 600 fs, input relative intensity noise <1%, and correctly chosen fiber lengths, the initial fluctuations of the pump laser are at most amplified by a factor of three. We also show that the usual strong correlation between SC coherence and quality of the compressed pulses collapses in the presence of technical noise, and that in this situation the coherence is not a useful figure of merit to quantify pulse quality, noise amplification, or decoherence due to incoherent nonlinear dynamics. Our results highlight the very limited impact of technical pump laser noise on ANDi SC generation and are of practical relevance for many ultrafast photonics applications that require high-quality, low-noise SC sources.

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“…Progress in development of high pulse energy, allfiber oscillators, as well as fiber concatenating technology prompted introduction of interesting all-fiber system for supercontinuum light sources (Nicholson et al 2003;Chen et al 2011;Petersen et al 2016;Hudson et al 2017;Tarnowski et al 2019). All-fiber supercontinuum systems are highly advantageous as they are robust, compact and lack the need for alignment, which makes them attractive for use by non-specialists.…”

Section: Introductionmentioning

confidence: 99%

Supercontinuum generation in nanostructured core gradient index fibers

Forestier

Karpate

Huss³

et al. 2020

Appl Nanosci

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We report on near-infrared supercontinuum generation in a submeter-long single-mode, nanostructured core fiber. The fiber core is composed of few thousand pure silica and germanium-doped silica glass nanorods with diameter of 200 nm each. The nanorods' distribution is calculated based on the Maxwell-Garnett effective medium approach to mimic effective parabolic refractive index distribution in the fiber core. The standard stack-and-draw method was used to scale down the fiber structure and obtain subwavelength nanorods in the core. Size and distribution of individual nanorods are essential to determine modal and dispersion properties of the fiber without assistance of air holes in the fiber cladding. We study supercontinuum generation performance in this nanostructured core fiber pumping with low-cost microchip laser operating at 1550 nm with 1 ns pulse length and pulse energy of 0.4 µJ. A modulation instability-driven supercontinuum is generated in the fiber, covering a wavelength span of 1400-2300 nm. Due to possibility of dispersion engineering and all-solid structure the nanostructured fibers offer new possibilities for development of low-cost all-fiber supercontinuum light sources for the near-infrared range and cascaded ultrabroadband supercontinuum all-fiber systems.

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Compact all-fiber source of coherent linearly polarized octave-spanning supercontinuum based on normal dispersion silica fiber

Cited by 34 publications

References 29 publications

Low noise all-fiber amplification of a coherent supercontinuum at 2 µm and its limits imposed by polarization noise

Low noise all-fiber amplification of a coherent supercontinuum at 2 µm and its limits imposed by polarization noise

Noise amplification in all-normal dispersion fiber supercontinuum generation and its impact on ultrafast photonics applications

Supercontinuum generation in nanostructured core gradient index fibers

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