DOUBLE-FREQUENCY ZEEMAN HELIUM-NEON LASER Russian patent published in 2011 - IPC H01S3/13 

FIELD: physics.

SUBSTANCE: laser has an active element in form of a coaxial gas-discharge tube with an inner totally reflecting and semitransparent output mirrors in magnetised adjustment units in an axial magnetic field. The coating of the totally reflecting mirror is made from 30 alternating layers of tantalum pentoxide Ta₂O₅ and silicon dioxide SiO₂. The coating of the output semitransparent mirror is made from 15-17 alternating layers of hafnium dioxide HfO₂ and silicon dioxide SiO₂. The output semitransparent mirror also has antireflection coating for wavelength λ=3.39 mcm and transmission of 1-3.5% for wavelength λ=0.63 mcm.

EFFECT: high laser radiation power with high differential frequency.

2 dwg