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Abstract

A monitor is described that can be used routinely by the operator of a high power CO-2 laser being used for material processing to measure and record a number of the beam characteristics of the laser. The microprocessor controlled monitor gathers data from a low powered sample of the laser beam. The monitor measures the power transmitted through a wavelength sensitive element, polarisation analysers and variously shaped and sized pinholes which have been positioned precisely over an image of the far field intensity profile of the laser beam. The parameters monitored are: the shape and stability of the far field intensity profile; plane of polarisation; divergence; pointing stability, and wavelength fluctuations. Data can be reduced to give beam quality assurance, and presented in a detailed form either for recording as part of quality assurance documentation or for use by laser maintenance personnel. Monitor control is by colour coded switches and menus, and requires a minimum of operator involvement or training.

Additional information

Authors: TRAVIS A J B UKAEA CULHAM LABORATORY, ABINGDON (UK), UKAEA CULHAM LABORATORY, ABINGDON (UK)
Bibliographic Reference: WRITE TO HER MAJESTY'S STATIONERY OFFICE, P.O. BOX 276, LONDON, SE1 9NH, MENTIONING REPORT CLM-R277, 1987, PRICE: UKL 5.00
Record Number: 1989126057400 / Last updated on: 1989-03-01
Category: PUBLICATION
Available languages: en