Turner R
Appl Opt. 1977 May 1;16(5):1197-203. doi: 10.1364/AO.16.001197.
The radial gain and refractive properties of an HCN amplifier using high current, short pulse excitation have been measured at 337 microm. The amplifier exhibits gain only after the electrons, which are produced at the wall, reach the amplifier axis, thus accounting for the delay normally observed between excitation and laser emission. Strong electron refractive effects, due to radial density gradients, are present that are associated with the gain and dynamics of the discharge. Weak magnetic fields can enhance or modulate the laser output. Strong fields, however, produce a current instability that destroys the symmetry of the gain profile and reduces the laser output.
利用大电流、短脉冲激发的HCN放大器在337微米波长处的径向增益和折射特性已被测量。该放大器仅在壁上产生的电子到达放大器轴后才表现出增益，这就解释了通常在激发和激光发射之间观察到的延迟。由于径向密度梯度，存在强烈的电子折射效应，这与放电的增益和动力学相关。弱磁场可以增强或调制激光输出。然而，强磁场会产生电流不稳定性，破坏增益分布的对称性并降低激光输出。
