Optimized All-Fiber Supercontinuum Source at 1.3 $\mu \hbox{m}$ Generated in a Stepwise Dispersion-Decreasing-Fiber Arrangement

Abrardi, Laura; Martín‐López, Sonia; Carrasco-Sanz, Ana; Corredera, Pedro; Hernanz, María Luisa; González‐Herráez, Miguel

doi:10.1109/jlt.2007.899808

Cited by 19 publications

(12 citation statements)

References 22 publications

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“…Other studies have investigated the possibility of engineering the group velocity dispersion (GVD) along the length of the waveguide in order to reach targeted output spectra [10]. In the framework of optical fiber, we can cite studies performed in simple structures such as tapered single mode fibers [11] or in stepwise dispersion decreasing optical fibers [12]. SCG in integrated structures has also raised a lot of attention, and demonstrations of onchip SCG in chalcogenide [13], silicon [14], amorphous silicon [15], silicon nitride [16] or in III-V materials [17] have been reported.…”

Section: Introductionmentioning

confidence: 99%

Generation of ultra-broadband coherent supercontinua in tapered and dispersion-managed silicon nanophotonic waveguides

Ciret¹,

Gorza²

2017

J. Opt. Soc. Am. B

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Tapered and dispersion managed (DM) silicon nanophotonic waveguides are investigated for the generation of optimal ultra broadband supercontinuum (SC). DM waveguides are structures showing a longitudinally dependent group velocity dispersion that results from the variation of the waveguide width with the propagation distance. For the generation of optimal SC, a genetic algorithm has been used to find the best dispersion map. This allows for the generation of highly coherent supercontinuums that span over 1.14 octaves from 1300 nm to 2860 nm and 1.25 octaves from 1200 nm to 2870 nm at -20 dB level for the tapered and DM waveguides respectively, for a 2 µm, 200 fs and 6.4 pJ input pulse. The comparison of these two structures with the usually considered optimal fixed width waveguide shows that the SC is broader and flatter in the more elaborated DM waveguide, while the high coherence is ensured by the varying dispersion.

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Section: Introductionmentioning

confidence: 99%

Generation of ultra-broadband coherent supercontinua in tapered and dispersion-managed silicon nanophotonic waveguides

Ciret¹,

Gorza²

2017

J. Opt. Soc. Am. B

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“…The general mechanism of CW pumped SC sources is well understood; in this regime the spectral broadening is attributed to the breakup of the pump into short pulses through the process known as soliton fission, which requires pumping at a wavelength in which the fiber exhibits low anomalous dispersion, in order to efficiently induce modulation instability (MI), after which a combination of stimulated Raman scattering (SRS) and parametric processes in the fiber trigger nonlinear broadening over a broad bandwidth, leading to SC generation [1]. A number of supercontinuum light sources relying on CW pumping schemes have been reported [2][3][4][5][6][7]; up to now, most CW pumped SC sources demonstrated have used highly nonlinear, dispersion-shifted fibers (HN-DSFs) as originally demonstrated in [2]. Other approaches include the use of dispersion decreasing fibers which can enhance the width of the generated continuum [3].…”

Section: Introductionmentioning

confidence: 99%

“…A number of supercontinuum light sources relying on CW pumping schemes have been reported [2][3][4][5][6][7]; up to now, most CW pumped SC sources demonstrated have used highly nonlinear, dispersion-shifted fibers (HN-DSFs) as originally demonstrated in [2]. Other approaches include the use of dispersion decreasing fibers which can enhance the width of the generated continuum [3]. However, one of the problems of generating a SC is the degradation of the output spectral flatness, especially when high pump powers are used.…”

Section: Introductionmentioning

confidence: 99%

High efficiency supercontinuum generation using ultra-long Raman fiber cavities

El-Taher¹,

Ania-Castañón²,

Karalekas³

et al. 2009

Opt. Express

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Supercontinuum generation in a multi-fiber ultra-long Raman fiber laser cavity is experimentally investigated for the first time. We demonstrate significantly enhanced spectral flatness and supercontinuum generation efficiency using only conventional single mode silica fiber. With a pump power of only 1.63W a ~15dB bandwidth >260 nm wide (from 1440 to >1700nm) supercontinuum source is reported with a flatness of <1dB over 180nm using an optimised hybrid TW/HNLF cavity. We address the dependence of the supercontinuum spectrum on the input pump power and ultra-long Raman cavity.

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“…The process of converting a CW laser emission into supercontinuum in optical fibers has been studied intensively in the last years, both experimentally [5], [6], [7], [8], [9], [10] and theoretically [11], [12], [13], [14]. These studies have shown that CW SC sources are initiated by modulation instability (MI) of the partially coherent input beam, which can lead to soliton formation and collision processes [15], [14].…”

Section: Introductionmentioning

confidence: 99%

“…This effect leads to the generation of shorter solitons which undergo a larger red-shift per fiber length due to intrapulse Raman scattering [18], [19]. Soliton compression can also be induced by use of dispersion management [9], [10], [20], leading to enhanced supercontinuum spectra.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Role of Chromatic Dispersion in Continuous-Wave Supercontinuum Generation

Abrardi

Martín‐López

Carrasco-Sanz

et al. 2009

J. Lightwave Technol.

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The influence of chromatic dispersion on CW-pumped supercontinuum generation in km-long standard fibers is experimentally investigated. We perform our study by means of a tunable, high-power fiber ring laser pumping a dispersion-shifted fiber in the wavelength range of small and medium anomalous dispersion. Our results show that, at low input powers, chromatic dispersion plays a dominant role on nonlinear pump spectral broadening, giving rise to a broader spectrum when pumping just above the zero-dispersion wavelength of the fiber. At higher input powers, however, the width of the generated supercontinuum spectrum is mostly due to the Raman effect, hence more independent of the value of the chromatic dispersion coefficient. We show that, in this case, the optimum pumping wavelengths for supercontinuum generation are not so close to the zero-dispersion wavelength of the fiber as in the previous case. In these conditions, as the chromatic dispersion grows we can obtain square-shaped and high-power density spectra, which seem extremely promising for applications in optical coherence tomography.

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Optimized All-Fiber Supercontinuum Source at 1.3 $\mu \hbox{m}$ Generated in a Stepwise Dispersion-Decreasing-Fiber Arrangement

Cited by 19 publications

References 22 publications

Generation of ultra-broadband coherent supercontinua in tapered and dispersion-managed silicon nanophotonic waveguides

Generation of ultra-broadband coherent supercontinua in tapered and dispersion-managed silicon nanophotonic waveguides

High efficiency supercontinuum generation using ultra-long Raman fiber cavities

Experimental Study on the Role of Chromatic Dispersion in Continuous-Wave Supercontinuum Generation

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