Abstract
Direct modulation of negative glow type laser, which utilizes the negative glow for laser pumping, was investigated. We proposed a unique method for this aim to use a grid, which is inserted in the cathode dark space, thereby to control the cathode fall in potential. Expected results were obtained by this means. The conclusions obtained from this investigation are summarized as follows.
(1) High voltage glow discharge in the range of 1kV was obtained, the V-I characteristics being freely controlled by controlling the grid potential.
(2) The principle of this triode system can be clearly explained by a series connection of two bulbs. The fundamental principle is to use the obstructed discharge.
(3) The mechanism of V-I control was explained using a model proposed and cathode fall theory.
(4) Expected modulation characteristics were obtained in negative glow type He-Cd+ laser.
