A method for controlling the phase locking of a multichannel laser system

Generation regimes of a pulsed Nd:YAG laser with transverse LED pumping and multiloop self-pumped phase-conjugate cavity

“…Three pairs of LED arrays are placed along the AE, and the LED arrays of each pair are placed on the opposite sides of the AE and emit in the opposite directions. The calculations show that such a pumping configuration provides a decrease in the spatial non uniformity of the gain with respect to the transverse cross section of the AE with a neodymium ion con centration of up to 0.6 at % to a level that is lower than the minimum level needed for the generation upon four wave mixing [16]. Figure 1 presents the optical scheme of the multi loop laser with one AE.…”

“…Recent interest in the lasers with four wave diffrac tion coupling in which the solid laser medium serves as both laser amplifier and element of optical coupling upon phase conjugation due to four wave interaction [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] has been driven by the progress in the technol ogy of multikilowatt LED pumping. The four wave interaction is based on the recording and reading of dynamic holograms (gain gratings in this work) that are recorded and erased upon development of laser generation and serve as a dynamic phase conjugate mirror.…”