TWO-MODE FREQUENCY STABILIZATION OF AN INTERNAL MIRR NM He-Ne LASER

Hatem El-Hennawi, Mohamed Sobee, Mohamed Amer, Osama Terra

Abstract

A Commercial He-Ne laser was stabilized to about 1 × 10^-9 for a two hour measurements and a frequency resettability of about 8.4 × 10^-9 for three months of measurements. The stabilization process depends on the two-mode frequency method using the power difference between the two orthogonal linearly polarized modes of the laser as an error signal. A simple and inexpensive feedback circuit has been used to control the heater current, wrapped around the laser cavity to keep the difference in power between the two modes at constant value.

Keywords

two-mode method, laser frequency stabilization, 633 nm He-Ne Laser

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IMEKO-TC7-2004-144.pdf

DOI

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IMEKO TC

TC7 - Measurement Science

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