Laser beam width, divergence and beam propagation factor — an international standardization approach

Wright, Daniel Nilsen; Greve, Peter; Fleischer, John M.; Austin, Lindsay

doi:10.1007/bf01588600

Cited by 91 publications

(32 citation statements)

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“…M e 2 is calculated by using the power content method, which regulates that the power in region of the beam waist and far field divergence angle is 86.5 % of the total power. 3) M e 2 is much close to the practice. In the past decades, however, a series of laser beam with M e 2 < 1 have realized experimentally.…”

Section: Introductionsupporting

confidence: 67%

Progress in New Laser Beam on Optical Beam Quality

Wang

Zhou

2004

The Review of Laser Engineering

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The historical and present research work of our group in laser beam on optical beam quality is reviewed in this paper. An invented intracavity CO 2 laser with M e 2 < 1 is presented, and the optical beam quality of beam from subwavelength aperture is investigated. Equivalent optical beam quality of quantum well laser beam is demonstrated. The progress will promote scientific development in correlative fields, also bring potential applications for optical industry.

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Section: Introductionsupporting

confidence: 67%

Progress in New Laser Beam on Optical Beam Quality

Wang

Zhou

2004

The Review of Laser Engineering

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“…The knife-edge (KE) method is a standard technique used commonly to measure transversal intensity profiles of laser beams [16][17][18]. It consists on recording the laser intensity while a sharp knife (typically a razor blade) is translated perpendicular to the beam propagation using a calibrated translation stage; as a result of this "eclipsing process" the cumulative distribution intensity (i.e.…”

Section: Knife-edge Technique For Spectral Measurementsmentioning

confidence: 99%

Rapid spontaneous Raman light sheet microscopy using cw-lasers and tunable filters

Rocha‐Mendoza

Licea-Rodríguez

Marro

et al. 2015

Biomed. Opt. Express

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Abstract:We perform rapid spontaneous Raman 2D imaging in light-sheet microscopy using continuous wave lasers and interferometric tunable filters. By angularly tuning the filter, the cut-on/off edge transitions are scanned along the excited Stokes wavelengths. This allows obtaining cumulative intensity profiles of the scanned vibrational bands, which are recorded on image stacks; resembling a spectral version of the knife-edge technique to measure intensity profiles. A further differentiation of the stack retrieves the Raman spectra at each pixel of the image which inherits the 3D resolution of the host light sheet system. We demonstrate this technique using solvent solutions and composites of polystyrene beads and lipid droplets immersed in agar and by imaging the C-H (2800-3100 cm −1 ) region in a C. elegans worm. The image acquisition time results in 4 orders of magnitude faster than confocal point scanning Raman systems, allowing the possibility of performing fast spontaneous Raman·3D-imaging on biological samples.

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“…The full width at half maximum (FWHM) of an infrared beam can be measured by the knifeedge method to calculate lateral resolution [26]. A blade is moved at known intervals across a beam and the resulting power is measured at each step.…”

Section: Lateral Resolution Calculationmentioning

confidence: 99%

Miniature real-time intraoperative forward-imaging optical coherence tomography probe

Joos¹,

Shen²

2013

Biomed. Opt. Express

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Optical coherence tomography (OCT) has a tremendous global impact upon the ability to diagnose, treat, and monitor eye diseases. A miniature 25-gauge forward-imaging OCT probe with a disposable tip was developed for real-time intraoperative ocular imaging of posterior pole and peripheral structures to improve vitreoretinal surgery. The scanning range was 2 mm when the probe tip was held 3-4 mm from the tissue surface. The axial resolution was 4-6 µm and the lateral resolution was 25-35 µm. The probe was used to image cellophane tape and multiple ocular structures. Wright, I. A. Vitkin, and V. X. D. Yang, "Electrostatic forward-viewing scanning probe for Doppler optical coherence tomography using a dissipative polymer catheter," Opt. Lett. 33(7), 657-659 (2008). ©2013 Optical Society of America

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Laser beam width, divergence and beam propagation factor — an international standardization approach

Cited by 91 publications

References 0 publications

Progress in New Laser Beam on Optical Beam Quality

Progress in New Laser Beam on Optical Beam Quality

Rapid spontaneous Raman light sheet microscopy using cw-lasers and tunable filters

Miniature real-time intraoperative forward-imaging optical coherence tomography probe

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