Generation of squeezed vacuum pulses using cascaded second-order optical nonlinearity of periodically poled lithium niobate in a Sagnac interferometer

Journal Article · Thu Oct 15 00:00:00 EDT 2009 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.80.043832· OSTI ID:21316498

Hirosawa, Kenichi; Ito, Yasuyuki; Ushio, Hidetake; Nakagome, Hisayuki; Kannari, Fumihiko ^[1]

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1. Department of Electronics and Electrical Engineering, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522 (Japan)

Squeezed vacuum pulses up to -1.7 dB at telecom-band ({approx}1550 nm) is generated with femtosecond laser pulses using cascaded {chi}{sup (2)} optical nonlinearity in a periodically poled lithium niobate crystal placed in a Sagnac interferometer. In spite of group velocity mismatch at short laser pulse pumping, sufficient cascaded nonlinear wave mixing is obtainable at the wavelength shifted from the phase matching wavelength for second harmonic generation. The theoretical model prediction agrees well with the experimental results.

• OSTI ID: 21316498
• Journal Information: Physical Review. A, Vol. 80, Issue 4; Other Information: DOI: 10.1103/PhysRevA.80.043832; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
HARMONIC GENERATION
INTERFEROMETERS
LASERS
LITHIUM
LITHIUM COMPOUNDS
NIOBATES
NONLINEAR PROBLEMS
OPTICAL PUMPING
PERIODICITY
PULSES
QUANTUM ENTANGLEMENT
WAVELENGTHS