Theoretical Study Of Deeply Thereto-Stable Telescopic Resonators

In this paper, the deeply thermo-stable telescopic resonators whose g* parameters satisfy the condition g1*g2*≈1/2 are theoretically investigated in detail. A formula of the: telescope defocusing which can compensate the thermal lensing of laser rod is obtained, using an equivalent thick lens and transfer matrix method. It has been shown that under appropriate assumptions the simplified approximate expressions of the telescope defocusing derived by Hanna and Z. Lu can be obtained simply from our formulae. The computer simulations and numerical calculations have been carried out to confirm our theoretical results and have given a series of curves, which is useful for the telescope-resonator design.