Pulsed squeezed light: Simultaneous squeezing of multiple modes

Journal Article · Thu Jun 15 04:00:00 EDT 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.73.0· OSTI ID:20787584

Wasilewski, Wojciech ^[1]; Lvovsky, A I ^[2]; Banaszek, Konrad ^[1]; Radzewicz, Czeslaw ^[3]

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1. Institute of Physics, Nicolaus Copernicus University, Grudziadzka 5, 87-100 Torun (Poland)
2. Department of Physics and Astronomy, University of Calgary, Calgary, Alberta, T2N 1N4 (Canada)
3. Institute of Experimental Physics, Warsaw University, Hoza 69, 00-681 Warsaw (Poland)

We analyze the spectral properties of squeezed light produced by means of pulsed, single-pass degenerate parametric down-conversion. The multimode output of this process can be decomposed into characteristic modes undergoing independent squeezing evolution akin to the Schmidt decomposition of the biphoton spectrum. The main features of this decomposition can be understood using a simple analytical model developed in the perturbative regime. In the strong pumping regime, for which the perturbative approach is not valid, we present a numerical analysis, specializing to the case of one-dimensional propagation in a beta-barium borate waveguide. Characterization of the squeezing modes provides us with an insight necessary for optimizing homodyne detection of squeezing. For a weak parametric process, efficient squeezing is found in a broad range of local oscillator modes, whereas the intense generation regime places much more stringent conditions on the local oscillator. We point out that without meeting these conditions, the detected squeezing can actually diminish with the increasing pumping strength, and we expose physical reasons behind this inefficiency.

• OSTI ID: 20787584
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 6 Vol. 73; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BARIUM COMPOUNDS
BORATES
ENERGY SPECTRA
NUMERICAL ANALYSIS
ONE-DIMENSIONAL CALCULATIONS
OPTICAL PUMPING
OSCILLATORS
VISIBLE RADIATION
WAVEGUIDES