Raman emission by an axicon-generated superluminal source is demonstrated. The anti-Stokes radiation is emitted at an angle defined by a Čerenkov-type condition. This technique of superluminal-source generation has advantages in both low pump self-phase modulation and compensation of temporal walk-off caused by group-velocity dispersion, rendering the scheme useful for efficient Raman conversion, pump–probe measurements, and harmonic and optical parametric generation with ultrashort intense pulses.
© 1995 Optical Society of America
Original Manuscript: May 8, 1995
Published: September 15, 1995
I. Golub, "Superluminal-source-induced emission," Opt. Lett. 20, 1847-1849 (1995)