Alexey Okulov
| Alexey Okulov | |
|---|---|
| Born | 12 July 1956 Russian SFSR, Soviet Union |
| 🏳️ Nationality | Russian |
| 🎓 Alma mater | Moscow Institute of Physics and Technology |
| 💼 Occupation | |
| Known for | Phase conjugation, Michelson interferometer, Bose–Einstein condensate, Angular momentum of light, Chaos theory, Soliton |
| 🏅 Awards |
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Alexey Okulov (Russian: Алексей Юрьевич Окулов) is a Soviet and Russian physicist, the author of pioneering works in laser physics and theoretical physics.
Biography
Joined Lebedev Physical Institute Moscow in October 1979. Graduated from Moscow Institute of Physics and Technology in 1980, and received his PhD from Lebedev Physical Institute, with the thesis "Periodicity and Chaos in Structured Light" in 1994.
Research
A.Yu. Okulov made substantial contributions in the optical phase conjugation, angular momentum of light, ultracold atoms theory and chaos theory. In 1979-1980 he made seminal experiments on coherent summation of laser beams via Optical phase conjugation in stimulated Brillouin scattering.[1] The Michelson interferometer had been used to demonstrate the universal method for robust coherent summation of laser beams with complex amplitude and phase profile. The nontrivial feature of the Michelson interferometer with stimulated Brillouin scattering mirror is that the interference pattern is insensitive to wavelength-scale phase distortions. This gives the unique opportunity to use a binary tree of beamsplitters for coherent addition of laser amplifiers.[2] Constructive interference in an array containing beamsplitters of laser beams synchronized by phase conjugation may increase the brightness of output amplified beam as .
This work demonstrated that linewidth of the stimulated Brillouin scattering phase conjugate mirror is due to stepwise phase fluctuations[3] rather than phase diffusion responsible for conventional Schawlow-Townes Laser linewidth.[4]
In 2014 Dr. Okulov showed that such binary-tree Michelson phase-conjugator with degenerate four-wave mixing Kerr nonlinear mirror could be used for coherent summation[5] of chirped-pulse fiber laser amplifiers.[6]
In a field of Structured light Dr.Okulov proved theoretically that angular momentum of light is reversed in exactly opposite direction in optical phase conjugation mirror.[7] He showed that due to conservation of angular momentum, the optical phase conjugation mirror experiences the optical torque in addition to Radiation pressure.[8] For these symmetry reasons, acoustical vortices are excited inside a stimulated Brillouin scattering phase-conjugating mirror.[9] He suggested a robust Sagnac-like interferometer for the perfect optical phase conjugation of vortex photons.[10]
A.Yu.Okulov built an exact theory for the quantum condensed matter trapped by optical vortices in Gross–Pitaevskii equation mean field approach.[11] He found exact solutions describing superfluid motion in twisted optical potential mounted in slowly rotating reference frame[12]
In a field of nonlinear dynamics of lasers Alexey Okulov introduced robust and computationally efficient method of infinite dimensional maps. The nonlinear spatiotemporal effects in laser pulse propagation as spatial solitons, Talbot effect[13] and vortex lattices are computed via fast Fourier transform (FFT) and iterates of nonlinear integral mappings known from Chaos theory.[14]
- Member of the Optical Society since 1995
- Member of the APS since 1995
- Member of the SPIE since 1997
- Member of the DPG since 2021
See also
- Gross–Pitaevskii equation
- Disk laser
- Optical vortex
- Michelson interferometer
- Angular momentum
- Radiation pressure
- Orbital angular momentum of light
- Chaos theory
- Chirped pulse amplification
- Soliton (optics)
- Self-focusing
- Nonlinear optics
- Talbot cavity
- Coherent addition
References
- ↑ Basov, N G; Zubarev, I G; Mironov, A B; Michailov, S I; Okulov, A Yu (1980). "Laser interferometer with wavefront reversing mirrors". Sov. Phys. JETP. 52 (5): 847. Bibcode:1980ZhETF..79.1678B.
- ↑ Bowers, M W; Boyd, R W; Hankla, A K (1997). "Brillouin-enhanced four-wave-mixing vector phase-conjugate mirror with beam-combining capability". Optics Letters. 22 (6): 360–362. Bibcode:1997OptL...22..360B. doi:10.1364/OL.22.000360. PMID 18183201. Unknown parameter
|s2cid=ignored (help) - ↑ Basov, N G; Zubarev, I G; Mironov, A B; Michailov, S I; Okulov, A Yu (1980). "Phase fluctuations of the Stockes wave produced as a result of stimulated scattering of light". Sov. Phys. JETP Lett. 31 (11): 645. Bibcode:1980JETPL..31..645B.
- ↑ Schawlow, A. L.; Townes, C. H. (1958). "Infrared and optical masers". Physical Review. 112 (6): 1940–1949. Bibcode:1958PhRv..112.1940S. doi:10.1103/PhysRev.112.1940.
- ↑ Okulov, A Yu (2014). "Coherent chirped pulse laser network with Mickelson phase conjugator". Applied Optics. 53 (11): 2302–2311. arXiv:1311.6703. Bibcode:2014ApOpt..53.2302O. doi:10.1364/AO.53.002302. PMID 24787398. Unknown parameter
|s2cid=ignored (help) - ↑ Strickland, Donna; Mourou, Gerard (1985). "Compression of amplified chirped optical pulses". Optics Communications. Elsevier BV. 56 (3): 219–221. Bibcode:1985OptCo..56..219S. CiteSeerX 10.1.1.673.148. doi:10.1016/0030-4018(85)90120-8. ISSN 0030-4018.
- ↑ Okulov, A Yu (2008). "Angular momentum of photons and phase conjugation". Journal of Physics B: Atomic, Molecular and Optical Physics. 41 (10): 101001. arXiv:0801.2675. Bibcode:2008JPhB...41j1001O. doi:10.1088/0953-4075/41/10/101001. Unknown parameter
|s2cid=ignored (help) - ↑ Lebedew, Peter (1901). "Untersuchungen über die Druckkräfte des Lichtes". Annalen der Physik. 311 (11): 433–458. Bibcode:1901AnP...311..433L. doi:10.1002/andp.19013111102.
- ↑ Okulov, A.Y. (2008). "Optical and Sound Helical structures in a stimulated Mandelstam – Brillouin mirror". JETP Letters (in русский). 88 (8): 561–566. Bibcode:2008JETPL..88..487O. doi:10.1134/s0021364008200046. Archived from the original on 2015-12-22. Retrieved 2015-10-31. Unknown parameter
|url-status=ignored (help); Unknown parameter|s2cid=ignored (help) - ↑ Okulov, A Yu (2010). "Phase-conjugation of the isolated optical vortex using a flat surfaces". JOSA B. 27 (11): 2424–2427. arXiv:1006.2778. Bibcode:2010JOSAB..27.2424O. doi:10.1364/JOSAB.27.002424. Unknown parameter
|s2cid=ignored (help) - ↑ A. Yu. Okulov (2012). "Cold matter trapping via slowly rotating helical potential". Phys. Lett. A. 376 (4): 650–655. arXiv:1005.4213. Bibcode:2012PhLA..376..650O. doi:10.1016/j.physleta.2011.11.033. Unknown parameter
|s2cid=ignored (help) - ↑ 12.0 12.1 A. Yu. Okulov (2013). "Superfluid rotation sensor with helical laser trap". J. Low Temp. Phys. 171 (3): 397–407. arXiv:1207.3537. Bibcode:2013JLTP..171..397O. doi:10.1007/s10909-012-0837-7. Unknown parameter
|s2cid=ignored (help) - ↑ Okulov, A Yu (1990). "Two-dimensional periodic structures in nonlinear resonator". JOSA B. 7 (6): 1045–1050. Bibcode:1990JOSAB...7.1045O. doi:10.1364/JOSAB.7.001045.
- ↑ Okulov, A Yu (2020). "Structured light entities, chaos and nonlocal maps". Chaos, Solitons & Fractals. 133 (4): 109638. arXiv:1901.09274. Bibcode:2020CSF...13309638O. doi:10.1016/j.chaos.2020.109638. Unknown parameter
|s2cid=ignored (help)
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