Brief Communications

Mode locking and broadening of the spectrum of a signal at the Stokes frequency due to amplification in the field of a noise-like Gaussian pump wave

V. B. Gerasimov, E. M. Zemskov, V. K. Orlov


Abstract: It is shown that the use of a narrow-band noise-like Gaussian pump wave in the Raman amplifier makes it possible to perform efficient mode locking at the frequency of the first Stokes component. This locking is accompanied by a considerable broadening of the spectrum of the amplified signal and the signal exhibits pure amplitude modulation. The degree of mode locking and of the broadening of the spectrum is a function of the shape of the correlation function of the pump envelope.

UDC: 621.375.931

PACS: 42.60.Jf, 42.60.Fc, 42.60.Da, 42.50.Lc

Received: 04.03.1974

 English version: Soviet Journal of Quantum Electronics, 1975, 4:7, 923–924