Two-frequency dye laser with accurately controllable frequency difference

Abstract

A modification carried out inside a dye laser cavity in order to obtain simultaneous oscillation at two frequencies is described. The frequency difference is accurately tunable from zero to beyond 200 GHz and the system places no restriction on the operating wavelength (which is determined by the type of dye used).

Gain competition effect in dual-wavelength dye lasers

“…In a dual-wavelength dye laser, there is gain competition between the two wavelengths because the two laser lines share a common upper level. Due to this common upper level, characteristics of the dual-wavelength laser pulses cannot be independent of each other [1]. When laser fields of both wavelengths share the same active gain medium, gain of one field can affect the gain of the other.…”