Photochemistry and Spectroscopy Department

Institute of Physical Chemistry, Polish Academy of Sciences



This dye laser (pumped by a nitrogen or an excimer laser) is designed for various spectroscopic measurements. The resonator is constructed from diffraction grating G, widening prism P and flat mirror M. In the resonator cavity is inserted one of the six cuvettes. All of them contain dye solutions and are placed at a turreted mount T. Adjustment of the diffraction grating’s angle α and insertion of the proper dye are computer controlled, according to the selected wavelength’ tuning range. The laser is tunable from 379  to 850 nm, with the beam spectral width of about 0.3 nm. An essential feature of the laser construction is the possibility to use two beams of the radiation (B1 and B2). B1 beam comes out directly of the cuvette’s side. It has greater power, but can have significant contribution from undesirable superradiation, which lowers the spectral quality of the radiation. The proper shape of the prism P makes possible taking out the second beam B2. It comes out of diffraction grating’s side and is free from superradiation.