Generation of sub-6-fs blue pulses by frequency doubling with quasi-phase-matching gratings

Gallmann, L.; Steinmeyer, Günter; Keller, U.; Imeshev, G.; Fejer, M. M.; Meyn, Jan-Peter

doi:10.1364/ol.26.000614

Cited by 37 publications

(19 citation statements)

References 12 publications

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“…In these equations, the coupling coefficients κ j z are given by κ j z ω j d 0 n j c 2 π sinπDz; (6) and the accumulated phase mismatch ϕ 1 z is given by…”

Section: B Quasi-phasematchingmentioning

confidence: 99%

Apodization of chirped quasi-phasematching devices

et al. 2013

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Chirped quasi-phasematching (QPM) optical devices offer the potential for ultrawide bandwidths, high conversion efficiencies, and high amplification factors across the transparency range of QPM media. In order to properly take advantage of these devices, apodization schemes are required. We study apodization in detail for many regimes of interest, including low-gain difference frequency generation (DFG), high-gain optical parametric amplification (OPA), and high-efficiency adiabatic frequency conversion (AFC). Our analysis is also applicable to secondharmonic generation, sum frequency generation, and optical rectification. In each case, a systematic and optimized approach to grating construction is provided, and different apodization techniques are compared where appropriate. We find that nonlinear chirp apodization, where the poling period is varied smoothly, monotonically, and rapidly at the edges of the device, offers the best performance. We consider the full spatial structure of the QPM gratings in our simulations, but utilize the first order QPM approximation to obtain analytical and semianalytical results. One application of our results is optical parametric chirped pulse amplification; we show that special care must be taken in this case to obtain high gain factors while maintaining a flat gain spectrum.

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“…In these equations, the coupling coefficients κ j z are given by κ j z ω j d 0 n j c 2 π sinπDz; (6) and the accumulated phase mismatch ϕ 1 z is given by…”

Section: B Quasi-phasematchingmentioning

confidence: 99%

Apodization of chirped quasi-phasematching devices

et al. 2013

Self Cite

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“…This was attributed to the tight focus of the beam into the doubling crystal. Gallman et al noticed similar fluctuations in their upconverted spectrum when doubling a Ti:Sapph oscillator in a QPM structure [18].…”

Section: Downloaded By [The Agamentioning

confidence: 72%

Measuring ultrafast pulses in the near-ultraviolet using spectral phase interferometry for direct electric field reconstruction

Londero

Anderson

Radzewicz

et al. 2003

Journal of Modern Optics

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“…Since the first helium-neon laser was mode-locked 1 to obtain nanosecond optical pulses, effort has been devoted to produce short pulses down to only a few optical cycles [2][3][4][5] in the past 40 years. As ultrashort pulses shine on a small two-dimensional geometric shape such as a circular aperture, they will go through dramatic spatial and temporal changes [6][7] .…”

Section: Introductionmentioning

confidence: 99%

Experimental observation of diffraction of ultrashort laser pulses by a single slit

Zhang

Alexander

et al. 2006

Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications V

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Inspired by previous theoretical work, experiments on diffraction of 10 femtosecond ultrashort pulses passing through a single slit have been performed. Fringes are dramatically reduced or even eliminated in the diffraction of 10 fs ultrashort pulsed laser in the near field compared with that of the continuous-wave laser. This can be explained in the frequency domain as a result of the broadband spectrum contained in ultrashort pulses. Simulations are performed for Fresnel diffraction for both 10 fs ultrashort pulsed and continuous-wave lasers and the results agree with the experimental observation. The results of this work have important implication in biomedical imaging and remote imaging applications to name only a few.

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Generation of sub-6-fs blue pulses by frequency doubling with quasi-phase-matching gratings

Cited by 37 publications

References 12 publications

Apodization of chirped quasi-phasematching devices

Apodization of chirped quasi-phasematching devices

Measuring ultrafast pulses in the near-ultraviolet using spectral phase interferometry for direct electric field reconstruction

Experimental observation of diffraction of ultrashort laser pulses by a single slit

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