AI Article Synopsis
- Utilization of Dammann lenses on a spatial light modulator (SLM) is shown to trigger non-linear optical effects through binary phase elements generating equal intensity foci.
- The study examines how ultrashort pulse illumination impacts the uniformity of these generated patterns, particularly considering chromatic aberration for pulses shorter than 100 femtoseconds (fs).
- Experimental results, including multifocal second-harmonic generation (SHG) and active control of multiple filamentation in specific materials, align closely with theoretical predictions, confirming the effectiveness of this technique using a femtosecond laser.
Article Abstract
We demonstrate the utilization of Dammann lenses codified onto a spatial light modulator (SLM) for triggering non-linear effects. With continuous wave illumination Dammann lenses are binary phase optical elements that generate a set of equal intensity foci. We theoretically calculate the influence of ultrashort pulse illumination on the uniformity of the generated pattern, which is affected by chromatic aberration for pulses with temporal widths lower than 100 fs. The simulations also indicate that acceptable uniformity can be achieved for pulses of several fs by shortening the distance among foci which can be easily modified with the SLM. Multifocal second-harmonic generation (SHG) and on-axis multiple filamentation are produced and actively controlled in β-BaB2O4 (BBO) and fused silica samples, respectively, with an amplified Ti: Sapphire femtosecond laser of 30 fs pulse duration. Experimental results are in very good agreement with theoretical calculations.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/OL.38.001621 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Morgagnian cataract resulting from a naturally occurring nonsense mutation elucidates a role of CPAMD8 in mammalian lens development.
PLoS One
October 2017
University of Goettingen, Institute of Veterinary Medicine, Goettingen, Germany.
To investigate the genetic basis of hereditary lens opacities we analyzed 31 cases of bilateral congenital cataract in Red Holstein Friesian cattle. A genome-wide association study revealed a significant association on bovine chromosome 7 at positions 6,166,179 and 12,429,691. Whole genome re-sequencing of one case and four relatives showed a nonsense mutation (g.
View Article and Find Full Text PDFOn-axis non-linear effects with programmable Dammann lenses under femtosecond illumination.
Opt Lett
May 2013
Instituto de Nuevas Tecnologías de la Imagen, Universidad Jaume I, Castellón, Spain.
Article Synopsis
- Utilization of Dammann lenses on a spatial light modulator (SLM) is shown to trigger non-linear optical effects through binary phase elements generating equal intensity foci.
- The study examines how ultrashort pulse illumination impacts the uniformity of these generated patterns, particularly considering chromatic aberration for pulses shorter than 100 femtoseconds (fs).
- Experimental results, including multifocal second-harmonic generation (SHG) and active control of multiple filamentation in specific materials, align closely with theoretical predictions, confirming the effectiveness of this technique using a femtosecond laser.
Three-dimensional Dammann array.
Appl Opt
April 2012
Lab of Information Optics and Optoelectronics Techniques, Shanghai Institute of Optics and Fine Mechanics, Academia Sinica, Shanghai, China.
We demonstrate a scheme that can produce a three-dimensional (3D) focus spot array in a 3D lattice structure, called a 3D Dammann array, in focal region of an objective. This 3D Dammann array is generated by using two separate micro-optical elements, a Dammann zone plate (DZP) that produces a series of coaxial focus spots and a conventional two-dimensional (2D) Dammann grating (DG). A simple, fast, and clear method is presented to design this binary pure-phase (0,π) DZP in vectorial Debye theory regime.
View Article and Find Full Text PDF[Multislice spiral CT of the paranasal sinuses: first experiences using various parameters of radiation dosage].
Rofo
August 2000
Abt. f. Radiologische Diagnostik, Radiologische Universitätsklinik Tübingen.
Purpose: To evaluate the potential of multislice CT in the diagnosis of the paranasal sinuses.
Methods: Dose measurements were performed exposing an Alderson Rando phantom in a four-slice spiral CT (MS-CT) while applying a variety of scan parameters. Additionally, 30 consecutive patients underwent a transversal examination by the MS-CT using 1/1/3.
[Radiation exposure during spiral-CT of the paranasal sinuses].
Rofo
March 2000
Abt. f. Radiologische Diagnostik, Radiologische Universitätsklinik Tübingen.
Purpose: Determination of the radiation doses in spiral CT of the paranasal sinuses using a variety of mAs values and scan protocols.
Material And Methods: CT examinations of the paranasal sinuses were performed using an Alderson-Rando phantom. Radiation dose was determined by LiF-TLD at the level of high risk organs in the head and neck region for combinations of different scan parameters (2/3, 3/3, 3/4 mm) and decreasing charges (200, 150, 100, 50, 25 mAs) on a spiral CT.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!