dor_id: 41492

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856.4.0.u: http://revistas.unam.mx/index.php/rmf/article/view/14337/13675

100.1.#.a: Coello, V.; López, R.; Villagómez, R.; Cortés, R.

524.#.#.a: Coello, V., et al. (2008). Laser beam quality (M2) measured by distorted fresnel zone plates. Revista Mexicana de Física; Vol 54, No 004. Recuperado de https://repositorio.unam.mx/contenidos/41492

245.1.0.a: Laser beam quality (M2) measured by distorted fresnel zone plates

502.#.#.c: Universidad Nacional Autónoma de México

561.1.#.a: Facultad de Ciencias, UNAM

264.#.0.c: 2008

264.#.1.c: 2008-01-01

653.#.#.a: Optical diffraction gratings; Nd:YAG laser; Beam quality

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041.#.7.h: eng

520.3.#.a: In this paper we present a novel method, based on diffractive optics, for measuring M2 . This novel optical arrangement consists of a lens along with a set of 1 or 2 distorted diffraction gratings and a single array detector. As a result, this system produces simultaneous images of a number of different object planes centred over the laser beam propagation axis symmetrically to the laser beam waist. This image is gathered around the image plane using a CCD camera producing, in a single image and after some image processing, an instantaneous measurement for the laser beam quality. This technique allows for the possibility of monitoring the beam quality in real time, in a continuous or pulse-to-pulse mode operation. Nowadays, high power laser machining is a standard technique in manufacturing material processing that is widely used in industry. Although these lasers are not always stable for long periods of time, which is required in this kind of process, it usually takes considerable time to diagnose them and restore them to working order. The M2parameter is a numerical expression for laser beam quality that can be measured in real time over a process line. However, to measure the M2parameter, several measurements in the neighbourhood of the laser beam waist are required.

773.1.#.t: Revista Mexicana de Física; Vol 54, No 004 (2008)

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Artículo

Laser beam quality (M2) measured by distorted fresnel zone plates

Coello, V.; López, R.; Villagómez, R.; Cortés, R.

Facultad de Ciencias, UNAM, publicado en Revista Mexicana de Física, y cosechado de Revistas UNAM

Licencia de uso

Procedencia del contenido

Entidad o dependencia
Facultad de Ciencias, UNAM
Revista
Repositorio
Contacto
Revistas UNAM. Dirección General de Publicaciones y Fomento Editorial, UNAM en revistas@unam.mx

Cita

Coello, V., et al. (2008). Laser beam quality (M2) measured by distorted fresnel zone plates. Revista Mexicana de Física; Vol 54, No 004. Recuperado de https://repositorio.unam.mx/contenidos/41492

Descripción del recurso

Autor(es)
Coello, V.; López, R.; Villagómez, R.; Cortés, R.
Tipo
Artículo de Investigación
Área del conocimiento
Físico Matemáticas y Ciencias de la Tierra
Título
Laser beam quality (M2) measured by distorted fresnel zone plates
Fecha
2008-01-01
Resumen
In this paper we present a novel method, based on diffractive optics, for measuring M2 . This novel optical arrangement consists of a lens along with a set of 1 or 2 distorted diffraction gratings and a single array detector. As a result, this system produces simultaneous images of a number of different object planes centred over the laser beam propagation axis symmetrically to the laser beam waist. This image is gathered around the image plane using a CCD camera producing, in a single image and after some image processing, an instantaneous measurement for the laser beam quality. This technique allows for the possibility of monitoring the beam quality in real time, in a continuous or pulse-to-pulse mode operation. Nowadays, high power laser machining is a standard technique in manufacturing material processing that is widely used in industry. Although these lasers are not always stable for long periods of time, which is required in this kind of process, it usually takes considerable time to diagnose them and restore them to working order. The M2parameter is a numerical expression for laser beam quality that can be measured in real time over a process line. However, to measure the M2parameter, several measurements in the neighbourhood of the laser beam waist are required.
Tema
Optical diffraction gratings; Nd:YAG laser; Beam quality
Idioma
eng
ISSN
2683-2224 (digital); 0035-001X (impresa)

Enlaces