Single-photon Raman and super-Raman processes in a two-photon resonantly pumped four-level system

Title: Single-photon Raman and super-Raman processes in a two-photon resonantly pumped four-level system

Full Record
Other Related Research

Abstract

In this paper, the dressed-atom approach is successfully used to derive the analytic expression of the FIR gain coefficient for a two-photon resonantly pumped four-level system. The gain characteristics and AC Stark effect of the sytem are discussed in detail. It is theoretically proved that the stimulated super-Raman process can lead to high-power and frequency-stable FIR lasers.

Authors:: Changxin, Wang; Ensheng, Fu; Runwen, Wang

Publication Date:: 1988-10-01

Research Org.:: Shanghai Institute of Optics and Fine Mechanics, Academia Sinica

OSTI Identifier:: 6742502

Resource Type:: Journal Article

Journal Name:: Chin. Phys.; (United States)

Additional Journal Information:: Journal Volume: 8:4

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING; LASERS; GAIN; RAMAN EFFECT; FAR INFRARED RADIATION; FEASIBILITY STUDIES; FREQUENCY CONTROL; STARK EFFECT; AMPLIFICATION; CONTROL; ELECTROMAGNETIC RADIATION; INFRARED RADIATION; RADIATIONS; 420300* - Engineering- Lasers- (-1989)

Citation Formats


                    Changxin, Wang, Ensheng, Fu, and Runwen, Wang. Single-photon Raman and super-Raman processes in a two-photon resonantly pumped four-level system.  United States: N. p., 1988. 
        Web.

Copy to clipboard


                    Changxin, Wang, Ensheng, Fu, & Runwen, Wang. Single-photon Raman and super-Raman processes in a two-photon resonantly pumped four-level system.  United States.

Copy to clipboard


                    Changxin, Wang, Ensheng, Fu, and Runwen, Wang. Sat .  
        "Single-photon Raman and super-Raman processes in a two-photon resonantly pumped four-level system".  United States.

Copy to clipboard


                    
@article{osti_6742502,

  title        = {Single-photon Raman and super-Raman processes in a two-photon resonantly pumped four-level system},

  author       = {Changxin, Wang and Ensheng, Fu and Runwen, Wang},

  abstractNote = {In this paper, the dressed-atom approach is successfully used to derive the analytic expression of the FIR gain coefficient for a two-photon resonantly pumped four-level system. The gain characteristics and AC Stark effect of the sytem are discussed in detail. It is theoretically proved that the stimulated super-Raman process can lead to high-power and frequency-stable FIR lasers.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/6742502},
  journal      = {Chin. Phys.; (United States)},
number       = ,

  volume       = 8:4,

  place        = {United States},

  year         = {1988},

  month        = {10}

}

Copy to clipboard

Journal Article:

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Time-delayed probe spectroscopy in two-photon--pumped systems

Journal Article de Garcia, A G ; Meystre, P ; Salomaa, R R.E. - Phys. Rev. A; (United States)

We study transients in resonantly coupled three-level systems. Two of the levels are coupled by intense two-photon pumping, and the third one provides a probing level. Adiabatically eliminated levels appear in effective system parameters. Experimentally, this model is applicable, e.g., in resonantly enhanced parametric and harmonic generation in atomic vapors. A distinguishing feature in the system is the appearance of ac Stark shifts in the probe spectra when pumping at the two-photon resonance. The nutation signal is shown to give information on the effective two-photon Rabi frequency and on the decay rate of the dipole-forbidden two-photon coherence. Free-induction decay ismore »« less
https://doi.org/10.1103/PhysRevA.32.1531
Two-photon gain and lasing in strongly driven two-level atoms

Journal Article Lewenstein, M ; Zhu, Y ; Mossberg, T W - Physical Review Letters; (USA)

Driven two-level atoms are shown to exhibit strong, resonantly enhanced, two-photon gain. This gain, unlike that observed in nonlinear mixing processes, is not constrained by a phase-matching condition involving the pump beam. Physically, the gain can be associated with inverted two-photon transitions between dressed states or multiphoton stimulated Raman scattering, and it may be useful in the realization of a two-photon laser. Comparison with the well-known single-photon gain found in the same system is made.
https://doi.org/10.1103/PhysRevLett.64.3131
Multiphoton contributions to far infrared generation in optically pumped deuterium oxide

Thesis/Dissertation Petuchowski, S J

Far Infrared (FIR) emission at 66 and 50 ..mu..m in D/sub 2/O vapor, optically pumped with a CO/sub 2/ TEA laser, is shown to constitute a stimulated Raman process associated with each wave within a system of four molecular vibrational-rotational levels. A propagation model, based on a semiclassical, quasistatic (t much greater than T/sub 2/), density matrix analysis, is constructed and applied to the system. The model is generalized to include one-, two-, and three-wave interactions among three near-reasonant waves of arbitrary intensity in a variety of four-level system configurations. Level degeneracies and relative field polarizations are treated explicitly. Newmore »« less
Two-photon transitions in optically pumped submillimeter lasers

Journal Article Wiggins, J D ; Drozdowicz, Z ; Temkin, R J - IEEE J. Quant. Electron.; (United States)

The emission frequency of an amplified spontaneous emission (ASE), optically pumped submillimeter (SMM) laser has been studied as a function of laser gas pressure for several different gases and SMM laser lines. For off resonant pumping, Fabry--Perot interferometer scans indicate a shift in emission frequency between high- and low-pressure laser operation. In high-pressure operation, emission occurs via a Raman type, two-photon process with some additional frequency offset due to the ac Stark effect. The Raman process is favored by its higher quantum efficiency over a two-step process involving single-photon transitions at the pump and SMM wavelengths. In low-pressure operation, themore »« less
https://doi.org/10.1109/JQE.1978.1069673
Suppression effects in stimulated hyper-Raman emissions and parametric four-wave mixing in sodium vapor

Journal Article Garrett, W R ; Moore, M A ; Hart, R C ; ... - Physical Review A. General Physics; (United States)

Experimental investigations of two-photon enhanced stimulated hyper-Raman and parametric four-wave-mixing emissions are described for tuning unfocused laser beams near two-photon resonance with 3{ital D} and 4{ital D} states in sodium vapor. Over wide ranges of vapor pressures, path lengths, and laser power densities, the gains for stimulated hyper-Raman (SHR) scattering and for parametric four-wave mixing (PFWM) can become very greatly reduced from values expected from simple considerations. The suppression of gain can arise from interferences produced at two-photon and three-photon resonances, and from ac Stark shifts produced by internally generated near-resonant fields. Quantitative comparisons are made between observed and theoreticallymore »« less
https://doi.org/10.1103/PhysRevA.45.6687

Similar Records