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Journal ArticleDOI

Cascaded Raman and Intermodal Four-Wave Mixing in Conventional Non-Zero Dispersion-Shifted Fiber for Versatile Ultra-Broadband Continuum Generation

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TLDR
In this article, the authors demonstrate an efficient ultra-broadband supercontinuum generation in telecom-grade optical fiber by pumping Q-switched subnanosecond laser pulses (0.77ns) at 1064 nm in the normal dispersion region of the fiber.
Abstract
We demonstrate an efficient ultra-broadband supercontinuum generation in telecom-grade optical fiber by pumping Q-switched subnanosecond laser pulses (0.77 ns) at 1064 nm in the normal dispersion region of the fiber. The fiber supports several spatial modes at this pump wavelength. Multiple sidebands with six Raman stokes spanning over more than 1100 nm (starting well below 600 nm and extending beyond 1700 nm) are generated using very low input pump power (average 57 mW). Theoretical analysis shows that cascaded Raman and cascaded intermodal four-wave mixing processes can account for the generation of multiple sidebands. We also demonstrate that the modal composition of the input pump profile can provide an extra degree of freedom in tailoring the multiple Raman peaks in the output spectrum.

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Citations
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Journal ArticleDOI

Random fiber laser directly generates visible to near-infrared supercontinuum.

TL;DR: The experimental results show that cascaded four wave mixing (FWM) and passive modulation of pump light can explain the appearance of visible components and pulse performance in time domain respectively.
Journal ArticleDOI

Nonlinear interactions in multimode optical fibers

TL;DR: In this paper, the authors address intermodal coupling based nonlinear phenomena in short and long pulse regimes and provide a roadmap for future research directions in the area of multimode nonlinear fiber optics.
Posted Content

Phase Synchronization in Stimulated Raman Process for Long Pulse Regime: Route for Wideband Coherent Spectrum Generation

TL;DR: In this article, the authors investigate the evolution of coherence property of noise-seeded Stokes wave in short ( 1 ps) regimes and show that the phase synchronization occurs by the transition of the Stokes Wave from incoherent to coherent spectra.
Proceedings ArticleDOI

High-power linearly-polarized supercontinuum generation from few-mode polarization-maintaining photonic crystal fiber

TL;DR: In this paper, a high-power broadband linearly-polarized supercontinuum (LP-SC) laser source was demonstrated by coupling the output of a polarization-maintaining picosecond master oscillator power amplifier (PM-MOPA) at 1064 nm into a few-mode photonic crystal fiber.
Journal ArticleDOI

High-power, ultra-broadband supercontinuum light generated in a single-mode fiber pumped with a nanosecond passively Q-switched microchip laser.

TL;DR: Wavelength-dependent transverse modes propagating in the SMF participating in the IMFWM process dramatically expand the spectral range in the visible region, and the experimental results are basically consistent with the theoretical simulations of broadband SC generated in theSMF through the IMF WM process.
References
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Journal ArticleDOI

Carrier-envelope phase control of femtosecond mode-locked lasers and direct optical frequency synthesis

TL;DR: The carrier-envelope phase of the pulses emitted by a femtosecond mode-locked laser is stabilized by using the powerful tools of frequency-domain laser stabilization to perform absolute optical frequency measurements that were directly referenced to a stable microwave clock.
Journal ArticleDOI

Ultrahigh-resolution optical coherence tomography using continuum generation in an air-silica microstructure optical fiber.

TL;DR: Ultrahigh-resolution optical coherence tomography (OCT) using continuum generation in an air-silica microstructure fiber as a low-coherence light source and imaging in biological tissue in vivo was demonstrated.
Journal ArticleDOI

Emission in the Region 4000 to 7000 Å Via Four-Photon Coupling in Glass

TL;DR: In this article, four-photon stimulated scattering has been observed in borosilicate glass under high-power 5300-AA{} picosecond-pulse excitation.
Journal ArticleDOI

Raman Oscillation in Glass Optical Waveguide

TL;DR: In this article, a glass fiber optical waveguide was used for the construction of wide-band fiber amplifiers and Raman oscillators tunable over a range of 100 A. Even though the Raman cross section is quite small, relatively low threshold for Raman emission can be achieved because high optical power densities are maintained over long lengths of waveguide.
Journal ArticleDOI

Controllable spatiotemporal nonlinear effects in multimode fibres

TL;DR: In this article, highly nonlinear ultrashort pulse propagation in the anomalous-dispersion regime of a graded-index multimode optical fiber was investigated and the results indicated that multimode fibres present unique opportunities for observing new spatiotemporal dynamics and phenomena.
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