We show that direct measurement of the beam radius in Z-scan experiments using a CCD camera at the output of a 4f-imaging system allows higher sensitivity and better accuracy than Baryscan. One of the advantages is to be insensitive to pointing instability of pulsed lasers because no hard (physical) aperture is employed as in the usual Z-scan. In addition, the numerical calculations involved here and the measurement of the beam radius are simplified since we do not measure the transmittance through an aperture and it is not subject to mathematical artifacts related to a normalization process, especially when the diffracted light intensity is very low.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/OL.38.002206 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Influence of Substrate Bias Voltage on Structure and Properties of (AlCrMoNiTi)N Films.
Nanomaterials (Basel)
December 2024
School of Intelligent Manufacturing, Luoyang Institute of Science and Technology, Luoyang 471023, China.
(AlCrMoNiTi)N high-entropy alloy nitride (HEAN) films were synthesized at various bias voltages using the co-filter cathodic vacuum arc (co-FCVA) deposition technique. This study systematically investigates the effect of bias voltage on the microstructure and performance of HEAN films. The results indicate that an increase in bias voltage enhances the energy of ions while concomitantly reducing the deposition rate.
View Article and Find Full Text PDFSilica Waveguide Thermo-Optic Mode Switch with Bimodal S-Bend.
Nanomaterials (Basel)
December 2024
State Key Laboratory of Integrated Optoelectronics, College of Electronic Science & Engineering, Jilin University, No. 2699 Qianjin Street, Changchun 130012, China.
A silica waveguide thermo-optic mode switch with small radius bimodal S-bends is demonstrated in this study. The cascaded multimode interference coupler is adopted to implement the E and E mode selective output. The beam propagation method is used in design optimization.
View Article and Find Full Text PDFAccuracy of the Hounsfield Unit Values Measured by Implant Planning Software.
Dent J (Basel)
December 2024
Department of Oral and Maxillofacial Implantology, Kanagawa Dental University, Yokosuka 238-8580, Japan.
: The measurement of Hounsfield units (HU) during implant treatment planning is important. Currently, various manufacturers' implant planning software programs offer HU capabilities; however, their accuracy remains unverified. In this study, we aimed to validate the accuracy of HU values measured by implant planning software programs.
View Article and Find Full Text PDFFactors influencing submandibular fossa visibility on panoramic images: a comparative CBCT study.
BMC Oral Health
December 2024
Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Izmir Katip Celebi University, Izmir, Türkiye.
Objective: This study aimed to investigate the variables affecting the visibility of the submandibular fossa (SF) on panoramic images, including SF depth and types, age, gender, presence or absence of tooth, location of mandibular canal, and alveolar bone thicknesses.
Methods: Cone beam computed tomography (CBCT) images and conventional panoramic images of 150 patients were analyzed retrospectively. The visibility of the SF on panoramic images was compared with its depth and adjacent alveolar bone thicknesses on CBCT.
On-Table Virtual Reality to Reduce Anxiety/Distress during Radiotherapy Treatments: A Pilot Randomized Trial.
Pract Radiat Oncol
December 2024
Radiation Oncology, Aspirus St. Luke's Hospital, Duluth MN; University of Minnesota Medical School, Duluth MN; Whiteside Institute for Clinical Research, Duluth MN. Electronic address:
We report the first randomized trial of a virtual reality (VR) headset used on-table during external beam radiotherapy treatments to reduce anxiety/distress during receipt of radiotherapy. A small pilot study was conducted among 10 patients, with VR randomized to start in the first week ('immediate VR') vs. second week ('delayed VR') of treatment.
View Article and Find Full Text PDFWant 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!