Generation of infrared supercontinuum covering 3–14 μm in dielectrics and semiconductors

Corkum, P. B.; Ho, P. P.; Alfano, R. R.; Manassah, Jamal T.

doi:10.1364/ol.10.000624

Cited by 107 publications

(29 citation statements)

References 14 publications

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“…The first observation of a SC dates back to 1970, when Alfano and Shapiro [3] focused powerful picosecond pulses into a glass sample and the observed continuum covered visible and near-infrared wavelengths. In the following years, similar broadening was observed in other solids, like semiconductors [4], also in H 2 O and D 2 O in 1977 [5] and in a jet stream of gaseous ethylene glygol in 1983 [6]. Nowadays, SCG has many novel applications in the field of telecommunication [7], highprecision frequency metrology [8], carrier phase stabilization [9], medical imaging [10] and pulse compression.…”

Section: Introductionmentioning

confidence: 57%

Supercontinuum generation based on nanofiber

Ying

Feng

et al. 2008

Optik

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Section: Introductionmentioning

confidence: 57%

Supercontinuum generation based on nanofiber

Ying

Feng

et al. 2008

Optik

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“…The WLC can be generated by focusing high energetic short pulses into a transparent medium such as water [22], glass [31], optical fiber [32], photonic crystals [33], dielectric and semiconductors [34], crystals such as BaF 2 [35] and inert gases such Krypton or Ar [36,37]. We produced WLC by slightly focusing femtosecond pulses into a hollow fiber filled with Ar gas.…”

Section: Introductionmentioning

confidence: 99%

Dispersive white light continuum single Z-scan for rapid determination of degenerate two-photon absorption spectra

et al. 2018

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We present an experimental technique to determine the degenerate two-photon absorption (2PA) spectra by performing a single Z-scan using a high-spectral-irradiance white light continuum (WLC) generated by a hollow core fiber. The hollow fiber was filled with Argon (Ar) gas at a pressure of 0.6 bar and was pumped with 500 mJ, 30 fs, and 800 nm pulses. The broadband WLC pulses with 350 nm bandwidth in the range of 600-950 nm were compressed to sub-8 fs pulses. To characterize and interpret the data obtained from this method, the spectral, temporal and spatial characteristics of the WLC were first analyzed. The WLC emerging from the compressor was dispersed using a prism pair and then focused into the sample by a cylindrical lens. Since different spectral components are spatially separated, any part of the sample in the beam cross section is irradiated with almost single wavelength pulses leading to only a degenerate 2PA process. The nonlinear transmittance was then measured by a charge-coupled-device (CCD) line camera as a function of the sample position while the sample was moved along the beam direction by a motorized translation stage. In this way the Z-scans at different wavelengths in the WLC spectral range can be measured and thus the wavelength-resolved degenerate 2PA spectra can be obtained by performing a single scan using dispersive WLC. This method was verified on a well-characterized dye Rhodamine B and yield a reasonable agreement with the data found in the literature. We used this method to determine the 2PA spectra of some two-photon initiators (2PIs) developed for two-photon polymerization (2PP) based 3D micro-structuring.

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“…There have been, however, only a limited number of such reports in MIR. Corkum et al [2] observed spectral broadening of picosecond pulses of 600-PJ energy at 9.3-Pm wavelength in semiconductor materials. Kapetanakos et al [3] numerically studied the modulation instability inside GaAs with two closely-spaced radiation lines of a CO 2 laser.…”

Section: Introductionmentioning

confidence: 99%

Spectral broadening and dispersion compensation of mid-infrared femtosecond pulses

Ashihara

Kawahara

Hirasawa

2010

2010 IEEE Photinic Society's 23rd Annual Meeting

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INTRODUCTIONSelf-phase modulation (SPM) is a nonlinear phenomenon widely used for broadening optical spectra in the visible to near-infrared (NIR) [1]. There have been, however, only a limited number of such reports in MIR. Corkum et al.[2] observed spectral broadening of picosecond pulses of 600-PJ energy at 9.3-Pm wavelength in semiconductor materials. Kapetanakos et al. [3] numerically studied the modulation instability inside GaAs with two closely-spaced radiation lines of a CO 2 laser. Recently, the supercontinuum extending from 0.8 Pm to 4.5 Pm has been demonstrated with ZBLAN fluoride fibers [4]. A drawback of such IR glass fibers is the difficulty in delivering high energy pulses because of the lower softening temperature. Kim et al. [5] demonstrated the supercontinuum generation at 2 ± 3.2 Pm by use of a single crystal sapphire fiber of high melting temperature. This material is useful in a range shorter than 5 Pm.Here we report that the efficient spectral broadening of MIR 100-fs pulses occurs via SPM in a GaAs single crystal. The second-order dispersion of the output pulses was compensated by the dispersive propagation in a CaF 2 plate to generate three-cycle pulses. The demonstrated scheme should work at any wavelength within the materials transparency range, and therefore be useful for spectral broadening of pulses generated from the well-established OPA-DFG system tunable around 3-18 Pm. Such MIR short pulses with broad spectra are of great importance in observing/controlling molecular vibrational dynamics.

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Generation of infrared supercontinuum covering 3–14 μm in dielectrics and semiconductors

Abstract: Infrared supercontinua spanning the range 3-14 microm were observed when an intense pulse generated from a CO(2) laser was passed into GaAs, AgBr, ZnSe, and CdS crystals. These supercontinua have been qualitatively compared with theoretical predictions.

Cited by 107 publications

References 14 publications

Supercontinuum generation based on nanofiber

Supercontinuum generation based on nanofiber

Dispersive white light continuum single Z-scan for rapid determination of degenerate two-photon absorption spectra

Spectral broadening and dispersion compensation of mid-infrared femtosecond pulses

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