It is shown that pump waves A and B at angle φ in a nonlinear medium generate gain for a signal wave C at the half-angle between the pump waves.
© 1981 Optical Society of America
Original Manuscript: June 11, 1981
Published: November 1, 1981
C. V. Heer, "Small-signal gain generated by two pump waves in a nonlinear medium," Opt. Lett. 6, 549-551 (1981)