Laser wavelength and bandwidth monitor

摘要: A first method for determining the relative wavelength shift of a laser beam away from known reference line, such as an absorption line gas in opto-galvanic cell or uses monitor etalon. The FSR etalon used to calculate is determined based on calculated gap spacing between plates, constant. fit measured values deviations function shift. also itself. second measuring absolute bandwidth and spectral purity tunable cell. directed interact with that undergoes optical transition within tuning range laser. tuned through cell, spectrum measured. are convoluted broadened by measurement. purity, respectively, correspondence beam.