Title :
Optical phase conjugation with very weak continuous-wave signals
Author :
Lanzerotti, M.Y. ; Schirmer, R.W. ; Gaeta, Alexander L.
Author_Institution :
Dept. of Phys., Cornell Univ., Ithaca, NY, USA
Abstract :
Summary form only given. We use a high-reflectivity phase-conjugate mirror (PCM) to demonstrate that optical phase conjugation can be performed on continuous-wave signal beams having power spectral densities as low as 5 x 10/sup -18/ W/Hz (i.e., 19 photons/sec.Hz). Our high-reflectivity (>600%), wide-bandwidth (90 MHz) PCM is formed by performing four-wave mixing in a potassium vapor cell using a frequency-stabilized Ti:sapphire laser that is tuned near the D/sub 2/ line. We have measured the noise spectra of the conjugate beam as functions of pump detuning from resonance, probe-pump detuning, pump-probe angular separation, and the number density of potassium atoms.
Keywords :
mirrors; multiwave mixing; optical noise; optical phase conjugation; potassium; shot noise; 90 MHz; Al/sub 2/O/sub 3/:Ti; D/sub 2/ line; K; K atoms; K vapor cell; continuous-wave signal beams; four-wave mixing; frequency-stabilized Ti:sapphire laser; high-reflectivity; high-reflectivity PCM; noise spectra; number density; optical phase conjugation; phase-conjugate mirror; power spectral densities; probe-pump detuning; pump detuning; pump-probe angular separation; resonance; very weak continuous-wave signals; wide-bandwidth; Atomic measurements; Four-wave mixing; Frequency; Laser beams; Laser noise; Mirrors; Nonlinear optics; Optical mixing; Optical pumping; Phase change materials;
Conference_Titel :
Quantum Electronics and Laser Science Conference, 1996. QELS '96., Summaries of Papers Presented at the
Conference_Location :
Anaheim, CA, USA
Print_ISBN :
1-55752-444-0
