Laser systems with internal scanning

Artur A. Mak; A. F. Kornev; Vasiliy P. Pokrovskiy; Leonid N. Soms; V. K. Stupnikov

doi:10.1117/12.146888

17 June 1993 Laser systems with internal scanning

Artur A. Mak, A. F. Kornev, Vasiliy P. Pokrovskiy, Leonid N. Soms, V. K. Stupnikov

Proceedings Volume 1864, Solid State Lasers IV; (1993) https://doi.org/10.1117/12.146888
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

Abstract

Figure 1 represents schematically the possible sources of pointing faults. First set of faults is connected with optical distortions and misalignements; these faults exist even when the target does not move. Here are: i - atmospherical distortions caused by turbulence, wind, and sometimes by thermal blooming; L2 distortions and misalignements of optical systems (both receiving, affecting the accuracy of target position determination, and transmitting, thus deteriorating output beam quality) ; E3 -faults that are usually connected with a discrete nature of coordinate photoreceptor; E4 -faults and distortions of the laser optical path: dynamic distortions in amplifiers, scanning systems limited accuracy, misalignements and vibrations of the optical elements, etc. It is worth to note that -2' and L4arenonlinearly dependen on the laser beam power. Second set of faults is connected with temporal delays; they are most dangerous when pointing to the moving targets. Here are: T1 - timeof double light pass to target; T2 - time of obtaining signal from photoreceptors; T3 - time of signal processing; T4 - response time of deflectors. So to achieve the high-stable laser beams pointing means to minimize the values of all listed factors. In some cases physical limitations exist (e.g. one can not overcome the diffraction limit for A2; or the light speed limit for T1 , and it easy to see that for long-distance cases this fundamental limitation becomes the strongest) ; in other cases the break-through lies in the development of non-optical technologies (as, say, in computing technology for T3). Thus our efforts were to find some possible and "optical" ways in order to improve the accuracy of laser beams pointing.

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Artur A. Mak, A. F. Kornev, Vasiliy P. Pokrovskiy, Leonid N. Soms, and V. K. Stupnikov "Laser systems with internal scanning", Proc. SPIE 1864, Solid State Lasers IV, (17 June 1993); https://doi.org/10.1117/12.146888

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