Octave spanning high-quality supercontinuum generation in all-fiber system

Nishizawa, Norihiko; Takayanagi, Jun

doi:10.1364/josab.24.001786

Cited by 103 publications

(68 citation statements)

References 24 publications

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“…(5), but would not experience additional nonlinear noise amplification as it is the case for anomalous dispersion pumping [46]. Indeed, experimental relative intensity noise (RIN) measurements have demonstrated that the noise characteristics of ANDi SC generated in the coherent regime are essentially identical to the RIN of the pump laser [24,32].…”

Section: Pump Sources With Noise Levels Exceeding the Shot Noise Limitmentioning

confidence: 99%

“…With this fiber design, octave-spanning SC bandwidths can be achieved that were previously only known from their anomalously pumped counterparts. The normal GVD suppresses soliton formation and MI resulting in significant advantages, such as the conservation of ultrashort compressible temporal pulses, uniformly flat spectral profiles, and, most importantly, high stability and coherence for a much larger range of pump pulse parameters [10,[23][24][25][26]. Even for launched pulses of several hundred femtoseconds duration, ANDi SC can be considered highly coherent, as the well-known nonlinear dynamics in this regime are dominated by self-phase modulation (SPM) and optical wave-breaking (WB) that create new wavelengths coherently with the pump pulse ( Fig.…”

Section: Introductionmentioning

confidence: 99%

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Limits of coherent supercontinuum generation in normal dispersion fibers

et al. 2017

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We study the largely unexplored transition between coherent and noise-seeded incoherent continuum generation in all-normal dispersion (ANDi) fibers and show that highly coherent supercontinua with spectral bandwidths of one octave can be generated with long pump pulses of up to 1.5 ps duration, corresponding to soliton orders of up to N = 600. In terms of N, this corresponds to an approximately 50 times increase of the coherent regime compared to anomalous dispersion pumping. In the transition region between coherent and incoherent spectral broadening we observe the manifestation of nonlinear phenomena that we term incoherent cloud formation and incoherent optical wave breaking, which lead to a gradual or instantaneous coherence collapse of SC spectral components, respectively. The role played by stimulated Raman scattering and parametric four-wave mixing during SC generation in ANDi fibers is shown to be more extensive than previously recognized: their nonlinear coupling contributes to the suppression of incoherent dynamics at short pump pulse durations, while it is responsible for non-phasematched parametric amplification of noise observed in the long pulse regime. We further discuss the dependence of SC coherence on fiber design, and present basic experimental verifications for our findings using single-shot detection of SC spectra generated by picosecond pulses. This work outlines both the further potential as well as the limitations of broadband coherent light source development for applications such as metrology, nonlinear imaging, and ultrafast photonics, amongst others.

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Section: Pump Sources With Noise Levels Exceeding the Shot Noise Limitmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Limits of coherent supercontinuum generation in normal dispersion fibers

et al. 2017

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“…This enables recompression close to the single-cycle limit using phase-compensation methods [13]. ANDi SC pumped at around 1.55 µm and extending past 2.0 µm with their redshifted side-band have already been reported [14,15]. The all-solid glass approach to photonic crystal fiber (PCF) fabrication [16] allows broadband flattening of the ANDi profile, as shown in oxide soft glass fibers [15,17].…”

Section: Introductionmentioning

confidence: 93%

Coherent supercontinuum bandwidth limitations under femtosecond pumping at 2 µm in all-solid soft glass photonic crystal fibers

et al. 2016

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“…These problems have recently been somewhat alleviated. It has been shown that smooth continua [57] can be generated when using very clean high power input pulses, such as generated by frequency filtered Raman solitons. Further optical supercontinua have been compressed down to pulse widths of 22 fs by the implementation of several stages of dispersion compensation [58].…”

Section: Coherent Fiber Supercontinuum Sourcesmentioning

confidence: 99%

Fiber laser based hyperspectral sources

Fermann¹,

Hartl²

2009

Laser Phys. Lett.

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Hyperspectral sources spanning from the XUV to the THz spectral range based on high power ultrafast fiber lasers are reviewed. With advances in large core and micro-structured fibers as well as absolute phase control techniques fiber systems can greatly exceed the performance of solid-state lasers systems in the hyperspectral domain. Experimental setup for an ultra-compact single-polarization passively modelocked fiber master oscillator power amplifier

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Octave spanning high-quality supercontinuum generation in all-fiber system

Cited by 103 publications

References 24 publications

Limits of coherent supercontinuum generation in normal dispersion fibers

Limits of coherent supercontinuum generation in normal dispersion fibers

Coherent supercontinuum bandwidth limitations under femtosecond pumping at 2 µm in all-solid soft glass photonic crystal fibers

Fiber laser based hyperspectral sources

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