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High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
Published on: June 28, 2016
High brightness, tunable biphoton source at 976 nm for quantum spectroscopy
Andreas Jechow1, Axel Heuer, Ralf Menzel
1Institute of Physics and Astronomy, University of Potsdam, Potsdam, Germany. ajechow@uni-potsdam.de
Optics Express
|August 20, 2008
Summary
We developed a compact biphoton source for quantum spectroscopy. This all-solid-state system generates tunable photon pairs efficiently, enabling new spectroscopic applications.
Area of Science:
- Quantum optics
- Spectroscopy
- Nonlinear optics
Background:
- Continuous-wave (CW) biphoton sources are crucial for quantum spectroscopy.
- Existing sources often lack tunability or compactness.
- Solid-state systems offer advantages in stability and integration.
Purpose of the Study:
- To present a compact, all-solid-state, continuous-wave biphoton source.
- To achieve tunability around 488 nm for quantum spectroscopic applications.
- To characterize the source's efficiency, flux rate, and spectral properties.
Main Methods:
- Utilized a frequency-doubled diode laser system as the pump source.
- Employed spontaneous parametric down-conversion (SPDC) in a type-0 quasi-phase-matched periodically poled lithium niobate (PPLN) waveguide.
- Investigated spectral behavior and flux rate as a function of detuning from degeneracy.
Main Results:
- Generated copolarized photon pairs at 976 nm in the fundamental transversal mode.
- Achieved a high SPDC efficiency of 8-10^-6.
- Obtained a high flux rate exceeding 10^7 photon pairs per second at microwatt pump powers (7x10^9 pairs/s-mW).
Conclusions:
- The developed biphoton source is compact and tunable, suitable for quantum spectroscopy.
- The high flux rate and efficiency demonstrate its potential for advanced quantum applications.
- The detailed spectral characterization provides valuable insights for source optimization.
