Computer-controlled portable He-Ne-I2 stabilized laser for interferometry

Josef Lazar; Ondrej Cip

doi:10.1117/12.301326

1 January 1998 Computer-controlled portable He-Ne-I₂ stabilized laser for interferometry

Josef Lazar, Ondrej Cip

Proceedings Volume 3320, Tenth Polish-Czech-Slovak Optical Conference: Wave and Quantum Aspects of Contemporary Optics; (1998) https://doi.org/10.1117/12.301326
Event: Tenth Polish-Czech-Slovak Optical Conference: Wave and Quantum Aspects of Contemporary Optics, 1996, Karpacz, Poland

Abstract

The iodine-stabilized He-Ne lasers are the wavelength standard for metrology of lengths in mechanical engineering and microelectronics today. The high accuracy of the frequency of this standard predetermines this laser to be the fundamental etalon for laser interferometry. In the contribution, a novel approach to design of a control He-Ne-I₂ electronics controlled by a PC computer is presented. During tuning the iodine spectrum can be monitored and frequency locking to the hyperfine lines is automatized. A general diagnostic via the computer is also available. The main aim of the design of a new electronic control unit was the attainment of a better noise suppression, higher reliability and better user comfort during operation. The design exploits the experience of using the first electronic system designed at the Institute of Scientific Instruments by B. Popela and his co-workers. The new stabilizing system is computer controlled, all functions are accessible only via the computer. The computer graphics of the PC gives an excellent opportunity of a highly comfortable operation. A simplified schematic is shown in figure 1. The control part consists of an interface, communication circuitry and data conversion, and switch controller. All the logic is of low consumption HC type and is galvanically isolated from the analog part. Data communication between the controller and digital-to-analog and analog-to-digital converters is executed through high-speed optocouplers.

Citation Download Citation

Josef Lazar and Ondrej Cip "Computer-controlled portable He-Ne-I₂ stabilized laser for interferometry", Proc. SPIE 3320, Tenth Polish-Czech-Slovak Optical Conference: Wave and Quantum Aspects of Contemporary Optics, (1 January 1998); https://doi.org/10.1117/12.301326

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