Abstract
A broadly tunable CW colour-centre laser spectrometer is described. The tuning mechanism and the problems for broad-band continuous single-mode tuning (about 50 cm-1 in two hours) are discussed. Calibrating and scanning of a laser is obtained by a 68000-VME-Bus microcomputer system (Eltec, Eurocom 3), while the frequency calibration and evaluation is done by an 80286 personal computer (Hewlett Packard, Vectra). Some structures for comfortable data processing of spectral files from continuously tunable lasers are presented. Measurements of frequency stability and the linearity of the tuning behaviour show that the spectrometer can be used routinely for Doppler-limited spectroscopy (minimum step width 10 MHz) of molecular transitions.
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