<-- Return to the previous page

Keren Bergman

Faculty Photo
Keren Bergman
Professor
911 CEPSR, Mail Code: 4712

Phone: +1 212-854-2280
Email:
Home Page

Office hours: Tuesdays and Thursdays 11:00–12:00 p.m., or by appointment


Appointments

  • Associate Professor of Electrical Engineering, Columbia University (2001– )
  • Technical Adviser, National Security Agency (1998– )
  • Senior member of technical staff, Tellium, Inc. (2000–2001)
  • Assistant Professor of Electrical Engineering, Princeton University (1994–2000)
  • Consultant, Bell Laboratories, Lucent Technologies (1995–2000)

 

Education

  • Ph.D., Electrical Engineering, Massachusetts Institute of Technology (June 1994)
  • M.S., Electrical Engineering, Massachusetts Institute of Technology (February 1991)
  • B.S., Electrical Engineering, Bucknell University (June 1988); summa cum laude

 

Synergistic Activities

  • Served on special panel formed by the national security community to formulate a national integrated high-end computing program. Panel generated CRA study report on "The Roadmap for the Revitalization of High-End Computing," Washington, D.C. (June 2003)
  • Associate Editor, IEEE Photonic Technology Letters (2004– )
  • Associate Editor, OSA Journal of Optical Networking (2001– )
  • Chair, IEEE–LEOS Committee on Optical Networking and Systems (2004– )
  • Optical Society of America Board of Directors (2001–2003)
  • IEEE LEOS VP for publications (2003–2004); VP for membership Americas (1999–2002); Princeton chapter, chair (1998–2001); board of governors (1996–1999)
  • Conference cochair, Microfabrication, Integration, and Packaging of MEMS / MOEMS DTIP 2003; CLEO Ultrafast Technical Committee (2000-2003); Ultrafast Electronics and Optoelectronics (UEO) Program Committee (2001–2002); UEO program chair for 2005; IEEE LEOS Optical Networking Technical Committee (1999–2001)
  • Reviewer for NSF programs, DoE, and DoD. Reviewer for many journals including: Optics Letters; Journal of the Optical Society of America B; Photonic Technology Letters; IEEE Journal of Quantum Electronics; Applied Physics B; IEEE Journal of Lightwave Technology; Journal of Optical Networking; Optics Express; IEEE Journal of Communications

 

Honors and Awards

  • Optical Society of America Fellow (2003)
  • CalTech President's Award (1997)
  • Office of Naval Research Young Investigator (1996–99)
  • National Science Foundation CAREER Program Investigator (1995–98)
  • AT&T Bell Laboratories Fellowship (1991–94)
  • General Electric Fellow (1988–89)
  • Eastman Kodak Scholar (1985–88)


Publications

W. Lu, O. Liboiron-Ladouceur, B.A. Small, and K. Bergman, “Cascading Switching Nodes in the Data Vortex Optical Packet Interconnection Network,” submitted to Electronic Letters.

W. Lu, B. A. Small, J. P. Mack, L. Leng, and K. Bergman, “Optical Packet Routing and Virtual Buffering in an Eight-Node Data Vortex Switching Fabric,” to appear in IEEE Photonic Technology Letters, (2004).

J.I. Dadap, P.B. Chu, I. Brener, C. Pu, C.D. Lee, K. Bergman, et al. “Modular MEMS-Based Optical Cross-Connect with Large Port-Count,” IEEE Photonic Technology Letters, 1773, 15 (2003).

Q. Yang and K. Bergman, "Performances of the Data Vortex Switch Architecture Under Non-uniform and Bursty Traffic," IEEE Journal of Lightwave Technology, p.1242, 20 (2002).

J.M. Roth, K. Dreyer, B.C. Collings, W.H. Knox, and K. Bergman, "Actively modelocked 1.5um, 10 GHz picosecond fiber laser using a monolithic semiconductor optical amplifier/electroabsorption modulator," IEEE Photonic Technology Letters, p.917, 14 (2002).

Q. Yang and K. Bergman, "Traffic Control and WDM Routing in the Data Vortex Packet Switch," IEEE Photonic Technology Letters, p.236, 14 (2002).

C. Xu, J.M. Roth, W.H. Knox and K. Bergman, "Ultra-sensitive autocorrelation of 1.5um light with single photon counting silicon avalanche photodiode," Electronic Letters, 86, 38 (2002).

J. M. Roth, N. H. Bonadeo, K. Bergman, and W. H. Knox, "Polarisation-maintaining, harmonically modelocked soliton fibre laser with repetition rate stabilisation using optical pumping of saturable Bragg reflector," Electronics Letters, 16, 38 (2002).

K. Bergman (invited) "Ultra-high capacity MEMS based optical cross-connects," 2, Vol. 4408, Proceedings of the SPIE, Design, Test, Integration, and Packaging of MEMS/MOEMS, DTIP (2001).

Q. Yang, F. Johnson, G. Hughes, K. Bergman, "WDM Packet Routing for High Capacity Data Networks," IEEE Journal of Lightwave Technology, 1420, 19 (2001).

S. T. Cundiff, B. C. Collings, and K. Bergman, “Polarization locked vector solitons and axis instability in optical fiber,” Chaos, p.613, 10 (2000).

N. H. Bonadeo, W. H. Knox, J. M. Roth, and K. Bergman, "Passive harmonic modelocked soliton fiber laser stabilized using an optically pumped saturable Bragg reflector," Optics Letters, 1421, 25 (2000).

Q. Yang, M. F. Arend, G. D. Hughes, F. G. Johnson, and K. Bergman, "WDM/TDM optical-packet-switched network for supercomputing," Proceedings of the SPIE, 555, 4089, (2000).

S. Sears, M. Solijacic, M. Segev, D. Krylov, and K. Bergman, "Cantor set fractals from solitons," Physical Review Letters, 1902, 84 (2000).

B. C. Collings, S. T. Cundiff, N. N. Akhmediev, J. M. Soto-Crespo, K. Bergman, and W. H. Knox, "Polarization-locked vector solitons in a fiber laser: experiment," Journal of the Optical Society of America B, 354, 17 (2000).

J. M. Soto-Crespo, N. N. Akhmediev, B. C. Collings, S. T. Cundiff, K. Bergman, and W. H. Knox, "Polarization-locked vector solitons in a fiber laser: theory," Journal of the Optical Society of America B, 366, 17 (2000).

Mikulla, L. Leng, S. Sears, B. C. Collings, M. Arend, and K. Bergman, "Broadband high repetition rate source for spectrally slice WDM," Photonics Technology Letters, 11, 418 (1999).

K. C. Neumann, E. H. Chadd, G. F. Liu, K. Bergman, and S. M. Block, "Characterization of photodamage in optical traps," Journal of Biophysics, 2856, 77 (1999).

D. Krylov, L. Leng, K. Bergman, J. C. Bronski, and J. N. Kutz, "Observation of the break-up of pre-chirped N-soliton pulses in an optical fiber," Optics Letters, 1191, 24 (1999).

M. Solijacic, S. Sears, M. Segev, D, Krylov, and K. Bergman, "Self-similarity and fractals driven by soliton dynamics," Photonics Science News, 5, 3 (1999).

D. Krylov and K. Bergman, and Y. Lai "Photon number squeezing in the normal dispersion regime," Optics Letters, 24, 774 (1999).

B. Mikulla, L. Leng, S. Sears, B. C. Collings, M. Arend, and K. Bergman, "Broadband high repetition rate source for spectrally slice WDM," Photonics Technology Letters, 11, 418 (1999).

S. T. Cundiff, B. C. Collings, L. Boivin, M. C. Nuss, K. Bergman, W. H. Knox, and S. G. Evagelides, "Propagation of highly chirped pulses in fiber optic communications systems," IEEE Journal of Lightwave Technology, 17, 811 (1999).

S. T. Cundiff, B. C. Collings, N. N. Akhmediev, J. M. Soto-Crespo, K. Bergman, and W. H. Knox, "Observation of polarization-locked vector solitons in optical fiber," Physical Review Letters, Vol. 82, issue 20, 3988 (1999).

D. Krylov and K. Bergman, "Amplitude soliton squeezing using asymmetric Sagnac fiber loop," Quantum Communications and Measurement, Plenum Press, New York (1998).

K. Bergman, B. C. Collings, J. N. Kutz, and W. H. Knox, invited paper "Multi-gigahertz femtosecond fiber lasers by passive modelocking," M. Digonnet and F. Ouellette editors, Vol. 3542, 2 SPIE Optical Engineering Press (1998)

D. Krylov and K. Bergman, "Amplitude squeezed solitons from an asymmetric fiber interferometer," Optics Letters, 23, 1390 (1998).

J. N. Kutz, B. C. Collings, K. Bergman, and W. H. Knox, "Stabilized pulse spacing in soliton lasers due to gain depletion and recovery," IEEE Journal of Quantum Electronics, 34, 1749 (1998)

B. C. Collings, K. Bergman, and W. H. Knox, "Stable multigigahertz pulse-train formation in a short-cavity passively harmonic mode-locked erbium/ytterbium fiber laser," Optics Letters, 23, 123 (1998).

B. C. Collings, K. Bergman, and W. H. Knox, "True fundamental solitons in a passively modelocked short cavity Cr+4:YAG laser," Optics Letters, 22, 1098 (1997).

J. N. Kutz, K. Bergman, S. Tsuda, S. Cundiff, W. H. Knox, P. Holmes, and M. I. Weinstein "Modeling pulse dynamics in a fiber laser with saturable Bragg reflector," Journal of the Optical Society of America B , 14, 2681 (1997).

S. D. Koehler, L. Leng, J. N. Kutz, and K. Bergman, "Ultrafast switching in highly birefringent fiber via soliton-soliton collisions," Optics Communications, 141, 265 (1997).

L. Leng, S. D. Koehler, J. N. Kutz, and K. Bergman, "Low-latency, ultrafast fiber loop mirror switch using orthogonally polarized signal and control solitons," Trends in Optics and Photonics, 13, 57 (1997).

B. C. Collings, K. Bergman, and W. H. Knox, "A passive harmonically modelocked multi-gigahertz Cr+4:YAG laser with optically phase-locked fundamental solitons," Trends in Optics and Photonics, 13, 14 (1997).

J. N. Kutz, S. D. Koehler, L. Leng, and K. Bergman, "Analytic study of orthogonally polarized solitons interaction in highly birefringent optical fibers," Journal of the Optical Society of America B, 14, 636 (1997).

B. C. Collings, K. Bergman, S. T. Cundiff, S. Tsuda, J. N. Kutz, J. E. Cunningham, W. Y. Jan, M. Koch, and W. H. Knox, "Short cavity Erbium/Ytterbium fiber lasers modelocked with a saturable Bragg reflector," IEEE Journal on Selected Topics in Quantum Electronics, 3, 1065 (1997).

B. C. Collings, S. Tsuda, W. H. Knox, J. B. Stark, and K. Bergman, "Saturable Bragg reflector modelocking of Cr+4:YAG laser pumped by diode-pumped Nd:YVO4," Optics Letters, 21, 1171 (1996).

J. D. Moores, K. Bergman, H. A. Haus, and E. P. Ippen, "Demonstration of Optical Switching by Means of Solitary Wave Collisions in a Fiber Ring Reflector," Selected Papers on Photonic Switching, A. Marrakchi, ed., Vol. MS 121, SPIE Optical Engineering Press (1996).

S. W. Seo, K. Bergman, and P. R. Prucnal, "Transparent optical networks with time-division multiplexing," invited paper IEEE Journal on Selected Areas in Communications, 14, 1039 (1996).

L.Boivin, C. R. Doerr, K. Bergman, and H. A. Haus, "Quantum noise reduction using a nonlinear Sagnac loop with positive dispersion," book chapter: Quantum Communications and Measurement, Plenum Press, New York (1995).

K. Bergman, H. A. Haus, E. P. Ippen, and M. Shirasaki, "Squeezing in a Fiber Interferometer with a GHz Pump," Optics Letters, 19, 290 (1994).

K. Bergman, C. R. Doerr, H. A. Haus, and M. Shirasaki, "Sub-Shot-Noise Measurement with Fiber-Squeezed Optical Pulses," Optics Letters, 18, 643 (1993)

M. Shirasaki, H. A. Haus, K. Bergman, and C. R. Doerr, "Quantum noise suppression in an optical interferometric system using optical squeezing," Fujitsu Scientific and Technical Journal, 28, 289 (1993).

H. A. Haus, K. Bergman, and M. Shirasaki, "Squeezing of optical pulses in fiber ring," Laser Physics, 2, 164 (1992).

L. Grishchuk, H. A. Haus, and K. Bergman, "Generation of Squeezed Radiation from Vacuum in the Cosmos and the Laboratory," Physical Review D, 46, 1440 (1992).

K. Bergman, H. A. Haus, and M. Shirasaki, "Analysis and Measurement of GAWBS Spectrum in a Nonlinear Fiber Ring," Applied Physics B, 55, 242 (1992)

H. A. Haus, K. Bergman, and Y. Lai, "Fiber Gyro with Squeezed Radiation," Journal of the Optical Society of America B, 8, 1952 (1991).

J. D. Moores, K. Bergman, H. A. Haus, and E. P. Ippen, "Demonstration of Optical Switching by means of Solitary Wave Collisions in a Fiber Ring Reflector," Optics Letters, 16, 138 (1991)

K. Bergman and H. A. Haus, "Squeezing in Fibers with Optical Pulses," Optics Letters, 16, 663 (1991).

J. D. Moores, K. Bergman, H. A. Haus, and E. P. Ippen, "Optical Switching using Fiber Ring Reflectors," Journal of the Optical Society of America B, 8, 594 (1991).

K. Bergman, S. D. Koehler, J. N. Kutz, and P. R. Prucnal, "Fiber optic modules for high speed interconnects," invited paper, IEEE-LEOS News (February 1996). 52. K. Bergman, "Pulsed squeezing in optical fibers," invited paper, IEEE-LEOS News (June 1995).