AN INDEPENDENTLY TUNABLE, COLLINEAR, VARIABLE DELAY, 2-WAVELENGTH DYE-LASER

The paper presents a novel resonator scheme consisting of two coupled dye laser resonators to obtain independently tunable and collinear two -wavelengths having adjustable delay between them. A single grating is used to provide dispersion and coupling. With 510.6 and 578.2 nm of c opper vapor laser to pump Rhodamine 6G and Sulforhodamine B dyes respe ctively the collinear outputs could be tuned over 566 to 606 nm and 60 0 to 640 nm with individual bandwidths of 0.24 cm(-1). By changing the path-difference between the pump beam components, the delay between t he two wavelengths could be varied from 21 to 30 ns. (C) 1998 Elsevier Science B.V. All rights reserved.