Fig. 1. Schematic diagram of two-stage tube laser amplifier. (a) Production of annular aberration;(b) schematic diagram of tube laser structure

Fig. 2. Schematic diagram of configuration for correcting in two-stage tube laser amplifier with self-correction

Fig. 3. Comparison of the curves of β factor and far-field intensity distributions before and after self-correction.(a1)--(a8) Concentricity error; (b1)--(b8) parallelism error; (c1)--(c8) collimation error

Fig. 4. Intensity distribution with self-correction on the focal plane(Δθ_s=1 mrad)

Fig. 5. Wavefront aberration decomposition of tube laser. (a) Wavefront before correction;(b) wavefront after correction

Fig. 6. Schematic diagram of matching error of two-stage tubes

Fig. 7. Schematic diagram of right-angle conical reflector errors. (a) Translation error and rotation error; (b) taper error

Fig. 8. Curves of β factor and far-field intensity distributions after non-ideal cone lens compensation. (a) Translation errors; (b) rotation errors; (c) taper errors

Fig. 9. Wavefront aberration decomposition of tube laser. (a) Translation error is 10 μm; (b) rotation error is 10 mrad; (c) taper error is 20 μrad