Research output: Contribution to journal › Article › peer-review
Coherent combining of pulses amplified in wideband parametric amplifiers under multiple-beam pumping. / Frolov, S. A.; Trunov, V. I.; Bagayev, S. N.
In: Quantum Electronics, Vol. 48, No. 4, 01.01.2018, p. 335-339.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Coherent combining of pulses amplified in wideband parametric amplifiers under multiple-beam pumping
AU - Frolov, S. A.
AU - Trunov, V. I.
AU - Bagayev, S. N.
PY - 2018/1/1
Y1 - 2018/1/1
N2 - The influence of fluctuations of pump beam parameters on the coherent combining efficiency of femtosecond pulses amplified in parametric amplifies based on LBO crystals under multiple-beam pumping is analysed. It is shown that in transition from a single-beam to two-beam pumping, the sensitivity of the parameters of amplified radiation to angular instability of the pump beams sharply increases. With increasing number of the pump beams, the sensitivity of the parameters to fluctuations of the pump beam propagation angle weakly varies. It is found that if a substantial number (n >> 1) of 2-cm-diameter beams amplified in parametric amplifiers under multiple-beam pumping are coherently combined, then obtaining the 98 % efficiency of this process requires the angular stabilisation of the pump beams better than 50 mrad. Fluctuations of other pump beam parameters such as energy, phase aberrations, and relative jitter either affect only the amplitude of the pulse amplified or the influence on the phase profile of the amplified beam is at most 10-2 rad, which should not noticeably affect the coherent combining of amplified pulses.
AB - The influence of fluctuations of pump beam parameters on the coherent combining efficiency of femtosecond pulses amplified in parametric amplifies based on LBO crystals under multiple-beam pumping is analysed. It is shown that in transition from a single-beam to two-beam pumping, the sensitivity of the parameters of amplified radiation to angular instability of the pump beams sharply increases. With increasing number of the pump beams, the sensitivity of the parameters to fluctuations of the pump beam propagation angle weakly varies. It is found that if a substantial number (n >> 1) of 2-cm-diameter beams amplified in parametric amplifiers under multiple-beam pumping are coherently combined, then obtaining the 98 % efficiency of this process requires the angular stabilisation of the pump beams better than 50 mrad. Fluctuations of other pump beam parameters such as energy, phase aberrations, and relative jitter either affect only the amplitude of the pulse amplified or the influence on the phase profile of the amplified beam is at most 10-2 rad, which should not noticeably affect the coherent combining of amplified pulses.
KW - Coherent combining
KW - Femtosecond pulses
KW - LBO
KW - Multiple-beam pumping
KW - Parametric amplification
UR - http://www.scopus.com/inward/record.url?scp=85046553460&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/0fac6480-a81e-3ca4-9868-257516c1c9f7/
U2 - 10.1070/QEL16645
DO - 10.1070/QEL16645
M3 - Article
AN - SCOPUS:85046553460
VL - 48
SP - 335
EP - 339
JO - Quantum Electronics
JF - Quantum Electronics
SN - 1063-7818
IS - 4
ER -
ID: 13120887