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Baruch Fischer

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Israeli professor of electro-optics

Baruch Fischer
NationalityIsraeli
Alma materBar-Ilan University, Caltech
Children3
Awardsfellow of Optica
Scientific career
FieldsElectro-Optics
InstitutionsTechnion

Baruch Fischer (Hebrew: ברוך פישר) is an Israeli optical physicist and Professor Emeritus in the Andrew and Erna Viterbi Faculty of Electrical and Computer Engineering of the Technion, where he was the Max Knoll Chair in Electro-Optics and Electronics.

He is a fellow of Optica (formerly known as the Optical Society of America) from 1996 "For contributions to photorefractive nonlinear optics, including development of the double phase conjugate mirror".

Early life and education

Baruch Fischer received his B.Sc. in 1973 in Physics from Bar-Ilan University. He continued his studies in Bar-Ilan, earning M.Sc. in 1975 and Ph.D. in 1980 (with “highest distinction”).

Career

Fischer was a Weizmann Postdoc Research Fellow at the California Institute of Technology (Caltech) from 1981, and joined the Technion in 1983 as a Senior Lecturer at the Department of Electrical Engineering. He was promoted to an Associate Professor in 1987 and to full professor in 1991.

Fischer served as the Dean of the Andrew and Erna Viterbi Faculty of Electrical and Computer Engineering during 1999–2004. In his Deanship period he conceived and founded the Moshe and Sara Zisapel Nano-Electronics Center and built the Viterbi Computech Center. He was the Head of the Micro-Electronics Research Center during 1993–2001, and the Opto-Electronics Research Center during 2008–2017. He retired in 2017 as an Emeritus Professor.

During the years, Fischer was a Topical Editor for Optics Letters, and on the editorial board of the Journal of Nonlinear Optical Physics and Materials. He was a Director of the Board of MRV Communications, Inc. (Chatsworth, CA), and was a member of the Technion Board of Governors. He founded in 2000 the start-up company "All-Optical".

Fischer was a visiting scholar and professor in Caltech, USC, Bell Labs, the University of Illinois, Tufts university, MIT and Bar-Ilan University.

He has supervised graduate students and postdocs. Among them (in academia): Shmuel Sternklar (now in Ariel University), Shimon Weiss (now in UCLA), Mordechai Segev (now in Technion), Moshe Horowitz (now in Technion), Omri Gat (now in the Hebrew University), and Gilead Oren (now in Soreq SNRC).

Research

His research included: Dipole and strain glasses (à la spin glass) and  magnetic and electric impurities in 2D metals, nonlinear-optics, where in the past he worked on photorefractive and phase conjugate optics (imitates “time reversal”), formulated and solved the full basic photorefractive four-wave mixing nonlinear equations, invented the first passive (self-pumped) phase-conjugate mirrors, the double phase conjugation, photorefractive self-trapping and photorefractive spatial solitons.

He demonstrated fixing information (images and gratings) in photorefractive crystals, the first transverse modes locking phenomenon and synthetic dimensions that can be lower or higher than 3 (hyper-combs) in mode-locked lasers.

He also worked on wave mixing in Bacterio-Rhodopsin, fiber-optics and fiber-optic communications, pulse optics, a new tunable laser, and localization effects in fibers and lasers.

Recently, he developed the approach of many-body photonics, showing a new view and use of statistical-mechanics based study in optics and lasers. It included phase-transitions and critical phenomena in lasers and light, noise-mediated Casimir-like pulse interactions mechanism in lasers, new classical laser light condensation effects, and the first observation of thermalization and quantum-statistical-based Bose-Einstein Condensation (BEC) of photons in fibers.

Personal life

Fischer is married to Esther and the father of Oded, Renana (Fischer-Weinberger) and Miriam (Fischer-Horowitz).

References

  1. ^ "Baruch Fischer". IEEE. Retrieved 14 August 2022.
  2. "Optica Fellows". Optica.
  3. ^ "Baruch Fischer - Biographical sketch". Technion. Retrieved 14 August 2022.
  4. "Alumni - Yariv Group". www.its.caltech.edu. Retrieved 14 August 2022.
  5. "PROFESSOR DANIEL TSUI, NOBEL LAUREATE IN PHYSICS FROM PRINCETON UNIVERSITY, AND PROFESSOR BARUCH FISCHER, DEAN OF ELECTRICAL ENGINEERING FROM THE TECHNION, JOIN MRV BOARD". sec.gov.
  6. "President's Report 2012" (PDF). Technion.
  7. "Graduate students". Technion.
  8. Fischer, Baruch; Klein, Michael W. (20 September 1976). "New Kind of Phase Transition in Randomly Distributed Tunneling Dipoles in Alkali Halides". Physical Review Letters. 37 (12): 756–759. Bibcode:1976PhRvL..37..756F. doi:10.1103/PhysRevLett.37.756.
  9. Fischer, Baruch; Klein, Michael W. (23 July 1979). "Strain Defects in Alkali Halides: A Heuristic Model for Glasses". Physical Review Letters. 43 (4): 289–293. Bibcode:1979PhRvL..43..289F. doi:10.1103/PhysRevLett.43.289.
  10. Fischer, Baruch; Klein, Michael W. (1 March 1975). "Magnetic and nonmagnetic impurities in two-dimensional metals". Physical Review B. 11 (5): 2025–2029. Bibcode:1975PhRvB..11.2025F. doi:10.1103/PhysRevB.11.2025.
  11. Fischer, Baruch; Cronin-Golomb, Mark; White, Jeffrey O.; Yariv, Amnon (1 November 1981). "Amplified reflection, transmission, and self-oscillation in real-time holography". Optics Letters. 6 (11): 519–521. Bibcode:1981OptL....6..519F. doi:10.1364/OL.6.000519. ISSN 1539-4794. PMID 19710757.
  12. Cronin-Golomb, M.; White, J. O.; Fischer, B.; Yariv, A. (1 July 1982). "Exact solution of a nonlinear model of four-wave mixing and phase conjugation". Optics Letters. 7 (7): 313–315. Bibcode:1982OptL....7..313C. doi:10.1364/ol.7.000313. ISSN 0146-9592. PMID 19714004.
  13. White, Jeffrey O.; Cronin-Golomb, Mark; Fischer, Baruch; Yariv, Amnon (15 March 1982). "Coherent oscillation by self-induced gratings in the photorefractive crystal BaTiO3". Applied Physics Letters. 40 (6): 450–452. Bibcode:1982ApPhL..40..450W. doi:10.1063/1.93144. ISSN 0003-6951.
  14. Cronin-Golomb, M.; Fischer, B.; White, J.; Yariv, A. (1984). "Theory and applications of four-wave mixing in photorefractive media". IEEE Journal of Quantum Electronics. 20: 12–30. Bibcode:1984IJQE...20...12C. doi:10.1109/JQE.1984.1072267.
  15. Weiss, S.; Sternklar, S.; Fischer, B. (1 February 1987). "Double phase-conjugate mirror: analysis, demonstration, and applications". Optics Letters. 12 (2): 114–116. Bibcode:1987OptL...12..114W. doi:10.1364/ol.12.000114. ISSN 0146-9592. PMID 19738810.
  16. Fischer, B.; Sternklar, S.; Weiss, S. (1989). "Photorefractive oscillators". IEEE Journal of Quantum Electronics. 25 (3): 550–569. Bibcode:1989IJQE...25..550F. doi:10.1109/3.18568. ISSN 1558-1713.
  17. Segev, Mordechai; Ophir, Yoav; Fischer, Baruch (15 June 1990). "Nonlinear multi two-wave mixing, the fanning process and its bleaching in photorefractive media". Optics Communications. 77 (2): 265–274. Bibcode:1990OptCo..77..265S. doi:10.1016/0030-4018(90)90446-Z. ISSN 0030-4018.
  18. Segev, Mordechai; Crosignani, Bruno; Yariv, Amnon; Fischer, Baruch (17 February 1992). "Spatial solitons in photorefractive media". Physical Review Letters. 68 (7): 923–926. Bibcode:1992PhRvL..68..923S. doi:10.1103/PhysRevLett.68.923. PMID 10046033. S2CID 27813107.
  19. Horowitz, Moshe; Bekker, Alexander; Fischer, Baruch (24 May 1993). "Broadband second-harmonic generation in SrxBa1−xNb2O6 by spread spectrum phase matching with controllable domain gratings". Applied Physics Letters. 62 (21): 2619–2621. Bibcode:1993ApPhL..62.2619H. doi:10.1063/1.109264. ISSN 0003-6951.
  20. Horowitz, Moshe; Bekker, Alexander; Fischer, Baruch (15 November 1993). "Image and hologram fixing method with SrXBa1−XNb2O6 crystals". Optics Letters. 18 (22): 1964–1966. Bibcode:1993OptL...18.1964H. doi:10.1364/OL.18.001964. ISSN 1539-4794. PMID 19829462.
  21. Fischer, Baruch; Werner, Ofer; Horowitz, Moshe; Lewis, Aaron (17 June 1991). "Passive transverse-mode organization in a photorefractive oscillator with saturable absorber". Applied Physics Letters. 58 (24): 2729–2731. Bibcode:1991ApPhL..58.2729F. doi:10.1063/1.104768. ISSN 0003-6951.
  22. Oren, Gilad; Schwartz, Alon; Bekker, Alexander; Levit, Boris; Fischer, Baruch (November 2012). "Multi-dimensional laser mode combs via active mode-locking". 2012 IEEE 27th Convention of Electrical and Electronics Engineers in Israel. pp. 1–5. doi:10.1109/EEEI.2012.6376919. ISBN 978-1-4673-4681-8. S2CID 11875553.
  23. Werner, Ofer; Fischer, Baruch; Lewis, Aaron; Nebenzahl, Isaiah (15 October 1990). "Saturable absorption, wave mixing, and phase conjugation with bacteriorhodopsin". Optics Letters. 15 (20): 1117–1119. Bibcode:1990OptL...15.1117W. doi:10.1364/OL.15.001117. ISSN 1539-4794. PMID 19771014.
  24. Werner, Ofer; Fischer, Baruch; Lewis, Aaron (15 February 1992). "Strong self-defocusing effect and four-wave mixing in bacteriorhodopsin films". Optics Letters. 17 (4): 241–243. Bibcode:1992OptL...17..241W. doi:10.1364/OL.17.000241. ISSN 1539-4794. PMID 19784288.
  25. Sourani, Yael; Bekker, Alexander; Levit, Boris; Fischer, Baruch (15 January 2019). "Tuning, selecting and switching wavelengths in lasers with chirped and sampled fiber Bragg gratings by high-order mode-locking". Optics Communications. 431: 151–157. Bibcode:2019OptCo.431..151S. doi:10.1016/j.optcom.2018.08.077. ISSN 0030-4018. S2CID 125984414.
  26. Fischer, null; Rosen, null; Bekker, null; Fishman, null (May 2000). "Experimental observation of localization in the spatial frequency domain of a kicked optical system". Physical Review E. 61 (5A): R4694–4697. Bibcode:2000PhRvE..61.4694F. doi:10.1103/physreve.61.r4694. ISSN 1063-651X. PMID 11031504.
  27. Rosen, Amir; Fischer, Baruch; Bekker, Alexander; Fishman, Shmuel (1 September 2000). "Optical kicked system exhibiting localization in the spatial frequency domain". JOSA B. 17 (9): 1579–1588. Bibcode:2000JOSAB..17.1579R. doi:10.1364/JOSAB.17.001579. ISSN 1520-8540.
  28. Shapira, Ofer; Fischer, Baruch (1 December 2005). "Localization of light in a random-grating array in a single-mode fiber". JOSA B. 22 (12): 2542–2552. arXiv:physics/0503041. Bibcode:2005JOSAB..22.2542S. doi:10.1364/JOSAB.22.002542. ISSN 1520-8540. S2CID 26402005.
  29. Gordon, Ariel; Fischer, Baruch (2 September 2002). "Phase transition theory of many-mode ordering and pulse formation in lasers". Physical Review Letters. 89 (10): 103901. Bibcode:2002PhRvL..89j3901G. doi:10.1103/PhysRevLett.89.103901. ISSN 0031-9007. PMID 12225193.
  30. Fischer, Baruch; Bekker, Alexander (1 September 2013). "Many-Body Photonics". Optics and Photonics News. 24 (9): 40–47. doi:10.1364/OPN.24.9.000040. ISSN 1541-3721.
  31. Gordon, Ariel; Fischer, Baruch (15 July 2003). "Phase transition theory of pulse formation in passively mode-locked lasers with dispersion and Kerr nonlinearity". Optics Communications. 223 (1): 151–156. Bibcode:2003OptCo.223..151G. doi:10.1016/S0030-4018(03)01622-5. ISSN 0030-4018.
  32. Gat, Omri; Gordon, Ariel; Fischer, Baruch (27 June 2005). "Light-mode locking: a new class of solvable statistical physics systems". New Journal of Physics. 7 (1): 151. Bibcode:2005NJPh....7..151G. doi:10.1088/1367-2630/7/1/151. ISSN 1367-2630. S2CID 121657957.
  33. Weill, Rafi; Rosen, Amir; Gordon, Ariel; Gat, Omri; Fischer, Baruch (30 June 2005). "Critical Behavior of Light in Mode-Locked Lasers". Physical Review Letters. 95 (1): 013903. arXiv:cond-mat/0502526. Bibcode:2005PhRvL..95a3903W. doi:10.1103/PhysRevLett.95.013903. PMID 16090617. S2CID 20590548.
  34. Rosen, Amir; Weill, Rafi; Levit, Boris; Smulakovsky, Vladimir; Bekker, Alexander; Fischer, Baruch (2 July 2010). "Experimental observation of critical phenomena in a laser light system". Physical Review Letters. 105 (1): 013905. Bibcode:2010PhRvL.105a3905R. doi:10.1103/PhysRevLett.105.013905. ISSN 1079-7114. PMID 20867449.
  35. Weill, Rafi; Bekker, Alexander; Smulakovsky, Vladimir; Fischer, Baruch; Gat, Omri (1 February 2016). "Noise-mediated Casimir-like pulse interaction mechanism in lasers". Optica. 3 (2): 189. Bibcode:2016Optic...3..189W. doi:10.1364/OPTICA.3.000189.
  36. Weill, Rafi; Fischer, Baruch; Gat, Omri (30 April 2010). "Light-mode condensation in actively-mode-locked lasers". Physical Review Letters. 104 (17): 173901. Bibcode:2010PhRvL.104q3901W. doi:10.1103/PhysRevLett.104.173901. ISSN 1079-7114. PMID 20482109.
  37. Weill, Rafi; Levit, Boris; Bekker, Alexander; Gat, Omri; Fischer, Baruch (2 August 2010). "Laser light condensate: experimental demonstration of light-mode condensation in actively mode locked laser". Optics Express. 18 (16): 16520–16525. Bibcode:2010OExpr..1816520W. doi:10.1364/OE.18.016520. ISSN 1094-4087. PMID 20721041.
  38. Oren, G.; Bekker, A.; Fischer, B. (2014). "Classical condensation of light pulses in a loss trap in a laser cavity". Optica. 1 (3): 145. Bibcode:2014Optic...1..145O. doi:10.1364/OPTICA.1.000145.
  39. Weill, R.; Bekker, A.; Levit, B.; Zhurahov, Michael; Fischer, B. (2017). "Thermalization of one-dimensional photon gas and thermal lasers in erbium-doped fibers". Optics Express. 25 (16): 18963–18973. arXiv:1607.01681. Bibcode:2017OExpr..2518963W. doi:10.1364/OE.25.018963. PMID 29041087. S2CID 46858659.
  40. Weill, Rafi; Bekker, Alexander; Levit, Boris; Fischer, Baruch (14 February 2019). "Bose–Einstein condensation of photons in an erbium–ytterbium co-doped fiber cavity". Nature Communications. 10 (1): 747. Bibcode:2019NatCo..10..747W. doi:10.1038/s41467-019-08527-0. ISSN 2041-1723. PMC 6376030. PMID 30765701.
  41. Weill, Rafi; Bekker, Alexander; Levit, Boris; Fischer, Baruch (16 August 2021). "Bose-Einstein condensation of photons in a long fiber cavity". Optics Express. 29 (17): 27807–27815. Bibcode:2021OExpr..2927807W. doi:10.1364/OE.430406. ISSN 1094-4087. PMID 34615189. S2CID 237723077.

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