Generation of squeezed pulses with a Sagnac loop fiber interferometer using a non-soliton femtosecond laser pulse at 800 nm.
We experimentally demonstrate generation of a squeezed vacuum at 800 nm with a Sagnac loop fiber interferometer. When negative dispersion is properly added to an input laser pulse to compensate for the fiber dispersion, the level of squeezing is improved. A squeezed vacuum of 0.45 dB is obtained at a dispersion of -0.0157 ps(2) for the 1.5 m-long fiber loop. Since the squeezed vacuum is degraded by guided acoustic-wave Brillouin scattering (GAWBS), the noise level of the squeezing is improved by -0.3 dB at a liquid nitrogen temperature. We also demonstrate generation of photon number squeezing at -1.3 dB.
Fujiwara
Y
Y
Department of Electronics and Electrical Engineering, Keio University, Kohoku-ku, Yokohama, Japan.
Nakagome
H
H
Hirosawa
K
K
Kannari
F
F
D000162:Acoustics; D000669:Amplifiers, Electronic; D004867:Equipment Design; D007368:Interferometry / Q000379:methods*; D007834:Lasers; D015233:Models, Statistical; D008962:Models, Theoretical; D009584:Nitrogen; D055100:Optical Fibers; D017785:Photons; D012542:Scattering, Radiation; D013059:Spectrum Analysis, Raman / Q000379:methods
D009584:Nitrogen