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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 20, Iss. 11 — Nov. 1, 2003
  • pp: 2255–2261

Coherent control and phase locking of two-photon processes in the nanosecond domain

Qun Zhang, Mark Keil, and Moshe Shapiro  »View Author Affiliations


JOSA B, Vol. 20, Issue 11, pp. 2255-2261 (2003)
http://dx.doi.org/10.1364/JOSAB.20.002255


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Abstract

We demonstrate phase locking between two pairs of nanosecond laser pulses generated from independent sources. We achieve phase locking experimentally by separately mixing two uncorrelated dye lasers of frequencies ω1(a) and ω1(b), with a common beam of frequency ω0, thereby generating two additional frequencies ω2(b)ω1(a)+ω0 and ω2(a)ω1(b)+ω0. We demonstrate that there are well-defined phase relationships between any two-photon process using the ω1(a) and the ω2(a) pair of frequencies versus any two-photon process that uses the ω1(b) and the ω2(b) pair. In particular, interference between the two identical sum frequencies ωtotal=ω1(a)+ω2(a) and ωtotal=ω1(b)+ω2(b), which we generate in a separate pair of mixing crystals, yields stable interference fringes with measured modulation depths of ±40%. Well-defined phase relationships are especially useful for two-photon versus two-photon coherent control experiments. In addition, the system can be used to transport, with a high degree of stability, the phase of a given input laser frequency ω0 to higher frequencies ωtotal by use of carrier lasers that need not be correlated.

© 2003 Optical Society of America

OCIS Codes
(020.1670) Atomic and molecular physics : Coherent optical effects
(020.4180) Atomic and molecular physics : Multiphoton processes
(030.1640) Coherence and statistical optics : Coherence
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(270.1670) Quantum optics : Coherent optical effects

Citation
Qun Zhang, Mark Keil, and Moshe Shapiro, "Coherent control and phase locking of two-photon processes in the nanosecond domain," J. Opt. Soc. Am. B 20, 2255-2261 (2003)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-20-11-2255

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