title: Noise figure and photon statistics in coherent anti-Stokes Raman scattering.
abstract: Coherent anti-Stokes Raman scattering (CARS) is a well-known Raman scattering process that occurs when Stokes, anti-Stokes and pump waves are properly phase-matched. Using a quantum-field approach with Langevin noise sources, we calculate the noise figure for wavelength conversion between the Stokes and anti-Stokes waves in CARS and show its dependence on phase mismatch. Under phase matched conditions, the minimum noise figure is approximately 3 dB, with a correction that depends on the pump frequency, Stokes shift, refractive indices, and nonlinear susceptibilities. We calculate the photon statistics of CARS and show that the photon number distribution is non-Gaussian. Our findings may be significant for currently pursued applications of CARS including wavelength conversion in data transmission and spectroscopic detection of dilute biochemical species.
authors.forename: D
authors.initials: D
authors.lastname: Dimitropoulos
authors.forename: D R
authors.initials: DR
authors.lastname: Solli
authors.forename: R
authors.initials: R
authors.lastname: Claps
authors.forename: B
authors.initials: B
authors.lastname: Jalali