Investigation on Characteristics of 6328Å He-Ne Gas Laser

Abstract

The properties of He-Ne gas laser has been investigated by many workers in this field. Yet due to the complicated dependence of characteristics especially of output power on tube parameters, no simple theory exists which could predict the detail of it. Hence more experimental investigations are required in order to reveal the output power characteristics of He-Ne gas laser. The purpose of this investigation is to observe the output power characteristics of He-Ne gas laser at 6328 Å wavelenth, the result would help to obtain the optimum power output for a given tube as well as optimum operation condition. The dependence of output power on excitation power is investigated first. This yields a different result from previous observation for a different laser tube. The variation of output power as well as radiation mode against the iris diameter is obtained by insertion of iris into resonator cavity. Besides, some investigationof polarization of laser beam by using polarizer variations of output power by applying different mode pattern are also made Finally the fluctuation of output power due to thermal effect is also presented.