Research Interests

• Laser Physics 
• Experimental Atomic Physics
  

Research interests include high precision tests of fundamental physics as well as applications of laser physics and technology. The research involves the study of laser noise and various approaches up to, and beyond, quantum limited optical detection. The present effort focuses on developing and using semiconductor diode lasers technology for atomic physics and precision measurements. Two areas of application are laser detection of isotopes and optical frequency synthesis.

Selected Publications

• B. Dahmani, L. Hollberg, and R.E. Drullinger, "Frequency Stabilization of Semiconductor Lasers by Resonant Optical Feedback", Opt. Lett., 12, 876878, 1987.
• L. Hollberg, Cw Dye Lasers, Chapter 5 in Dye Laser Principles with Applications, Eds. F. Duarte and L. Hillman, Academic Press, 185238, 1990.
• "Experimental Demonstration of Laser Oscillation without Population Inversion via Quantum Interference in Rb," A. S. Zibrov, M. D. Lukin, D. E. Nikonov, L. Hollberg, M. O. Scully, Phys. Rev. Lett. 75, 1499 (1995).
• "Semiconductor Diode Lasers", R. W. Fox, A. S. Zibrov, and L. Hollberg, in Experimental Methods in the Physical Sciences, vol. 29C, Atomic, Molecular and Optical Physics, Academic Press, 77-102 (1997).
• "Ultraslow Group Velocity and Enchanced Nonlinear Optical Effects in a Coherently Driven Hot Atomic Gas", M. M. Kash, V. A. Sautenkov, A. S. Zibrov, L. Hollberg, G. R. Welch, M. D. Lukin, Y. Rostovtsev, E. S. Fry, and M. O. Scully, Phys. Rev. Lett., 82, 5229-5232 (1999).
• J. Kitching and L. Hollberg, "Interference-Induced Optical Gain Without Population Inversion in Cold, Trapped Atoms", Phys. Rev. A, 59, 4685-4689 (1999).
• L. Gianfrani, R.W. Fox, and L. Hollberg, "Cavity-Enhanced Absorption Spectroscopy of Molecular Oxygen", J. Opt. Soc. Am. B, 2247-2254 (1999).
• C. W. Oates, F. Bondu, R. W. Fox and L. Hollberg, "A Diode-Laser Optical Frequency Standard Based on Laser-Cooled Ca Atoms:  Sub-kilohertz Spectroscopy by Optical Shelving Detection", Eur. Phys. J., D 7, 449-460 (1999).
• N. Vukicevic, A. S. Zibrov, L. Hollberg, F. L. Walls, J. Kitching and H. G. Robinson, "Compact Diode-Laser Based Rubidium Frequency Reference", to be published IEEE J. FCC. (2000).