Construction and characterization of a simple but flexible, low cost diode laser system for atomic spectrometry is reported. Detailed electronic circuit layouts of the diode laser current controller, supplying maximum 1300 mA current with 1 mA resolution, and functional description of all other components (temperature controller, optics, mount, etc.) are given. The system features bi-directional computer control and full diode laser protection against voltage, current and temperature failure/overrun. Results of electronic and spectroscopic tests show that wavelength tuning with a precision of approximately 0.01 nm and current modulation frequency up to 10 kHz are possible with this system. Performance characteristics qualify the proposed instrumental setup for atomic fluorescence and absorption measurements in inductively coupled plasmas.
ASJC Scopus subject areas
- Analytical Chemistry