本文从理论上详细讨论了当g~*参数满足条件g_1~*g_2~*=1/2的望远镜腔的深度热稳特性.解析地推导出补偿热扰的望远镜失调量(?)的精确表示式.并且证明,采用适当的假设,就可从精确公式推导出文献[4,5]中失调量(?)的简化近似公式.计算机模拟和数值计算证实了我们的理论结果,并给出光斑大小随望远镜腔参数变化的曲线.

In this paper the deeply thermo-stable characteristics of telescopic resonators with G parameters satisfied the condition G1G2 = l/2 are theoretically discussed in detail. An exact expression for the telescope defocusing which can compensate thermal disturbance is derived analytically. It has been shown that the simplified approximation formulae of the defoousing in Refs. [4] [5] can be easily deduced from this exact formulation if the appropriate assumptions are adopted. Computer simulation and numerical calculation are carried out to confirm our theoretical results and the curves which describe the variation of beam sized with telescope-resonator parameters are given.