Characteristics of an He–Ne laser with a transverse microwave discharge in a longitudinal magnetic field

An experimental investigation was made of the influence of a longitudinal magnetic field on the power and noise of He–Ne laser radiation utilizing a transverse microwave (λ = 0.63 µ) discharge. The laser radiation power increased in the presence of the magnetic field. The maximum increase in the output power produced by a field of H = 34.3 Oe reached 35% for the TEM_00q radiation mode and 20% for the TEM_33q mode. The field increased also the laser radiation noise in the range 1–20 kHz.