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Self-diffraction is a non-collinear four-wave mixing technique well-known in optics. We explore self-diffraction in the extreme ultraviolet (EUV) range, taking advantage of intense femtosecond EUV pulses produced by a free electron laser.…

The extreme ultraviolet (XUV) emission from dense plasmas generated with sub-10-fs laser pulses with varying peak intensities up to 3*10^16 W/cm^2 is investigated for different target materials. K shell spectra are obtained from low Z…

Plasma Physics · Physics 2009-11-13 J. Osterholz , F. Brandl , M. Cerchez , T. Fischer , D. Hemmers , B. Hidding , A. Pipahl , G. Pretzler , S. J. Rose , O. Willi

To understand the physical conditions of various gaseous systems, plasma diagnostics must be performed properly. To that end, it is equally important to have extinction correction performed properly. This means that the physical conditions…

Instrumentation and Methods for Astrophysics · Physics 2022-05-27 Toshiya Ueta

The relentless pursuit of understanding matter at ever-finer scales has pushed optical microscopy to surpass the diffraction limit and produced the super-resolution microscopy which enables visualizing structures shorter than the wavelength…

Ultrafast laser sources in the far ultraviolet (100 nm to 300 nm) have been the subject of intense experimental efforts for several decades, driven primarily by the requirements of advanced experiments in ultrafast science. Resonant…

Optics · Physics 2024-03-01 Christian Brahms , John C. Travers

High harmonic generation (HHG) enables coherent extreme-ultraviolet (XUV) radiation with ultra-short pulse duration in a table-top setup. This has already enabled a plethora of applications. Nearly all of these applications would benefit…

Optics · Physics 2021-06-07 R. Klas , A. Kirsche , M. Gebhardt , J. Buldt , H. Stark , S. Hädrich , J. Rothhardt , J. Limpert

We demonstrate that a near-dissociation photoassociation resonance can be used to create a deeply bound molecular sample of ultracold NaCs. To probe the resulting vibrational distribution of the sample, we use a new technique that can be…

Optical modulation of high-harmonics generation in solids enables the detection of material properties such as the band structure and promising new applications such as super-resolution imaging in semiconductors. Various recent studies have…

Scaling femtosecond terahertz (THz) and ultraviolet (UV) sources to high repetition rates is essential for high-throughput ultrafast spectroscopy and imaging applications. Yet, their efficient generation at high average power remains…

Optics · Physics 2026-01-06 Andrey Ryabov , Kasra Amini

Maximizing nonlinear light-matter interactions is a primary motive for compressing laser pulses to achieve ultrashort transform limited pulses. Here we show how, by appropriately shaping the pulses, resonant multiphoton transitions can be…

Atomic Physics · Physics 2009-11-10 Nirit Dudovich , Barak Dayan , S. M. G. Faeder , Yaron Silberberg

Multimode optical fibers represent the ideal platform for transferring multidimensional light states. However, dispersion degrades the correlations between the light's degrees of freedom, thus limiting the effective transport of ultrashort…

Ultrafast nonlinear photonics enables a host of applications in advanced on-chip spectroscopy and information processing. These rely on a strong intensity dependent (nonlinear) refractive index capable of modulating optical pulses on…

As telescopes get larger, the size of a seeing-limited spectrograph for a given resolving power becomes larger also, and for ELTs the size will be so great that high resolution instruments of simple design will be infeasible. Solutions…

Instrumentation and Methods for Astrophysics · Physics 2015-06-11 J. Gordon Robertson , Joss Bland-Hawthorn

We introduce a filter-construction method for pulse processing that differs in two respects from that in standard optimal filtering, in which the average pulse shape and noise-power spectral density are combined to create a convolution…

Data Analysis, Statistics and Probability · Physics 2012-12-11 B. K. Alpert , R. D. Horansky , D. A. Bennett , W. B. Doriese , J. W. Fowler , A. S. Hoover , M. W. Rabin , J. N. Ullom

The performance of a scintillating fiber detector prototype for tracking under high rate conditions is investigated. A spatial resolution of about100 micron is aimed for the detector. Further demands are low occupancy and radiation hardness…

High Energy Physics - Experiment · Physics 2007-05-23 E. C. Aschenauer , J. Baehr , V. Gapienko , B. Hoffmann , A. Kharchilava , H. Luedecke , R. Nahnhauer , R. Shanidze

This paper addresses the issue of how best to correct astronomical data for the wavelength-dependent effects of Galactic interstellar extinction. The main general features of extinction from the IR through the UV are reviewed, along with…

Astrophysics · Physics 2009-10-31 Edward L. Fitzpatrick

Single-beam super-resolution microscopy, also known as superlinear microscopy, exploits the nonlinear response of fluorescent probes in confocal microscopy. The technique requires no complex purpose-built system, light field modulation, or…

Advances in silicon photonics have resulted in rapidly increasing complexity of integrated circuits. New methods are desirable that allow direct characterization of individual optical components in-situ, without the need for additional…

Using GHz repetition rate pulses in burst mode has demonstrated numerous advantages for highly efficient material removal. In this work, we present high-speed (over 100 kHz) micro-laser-induced breakdown spectroscopy (micro-LIBS) with…

Optics · Physics 2025-02-18 Ayesha Noor , Emre Hasar , Parviz Elahi