Fig. 3From: Suppression of residual amplitude modulation appeared in commercial electro-optic modulator to improve iodine-frequency-stabilized laser diode using frequency modulation spectroscopyThe relationship between absorption signal, first-derivative signal (1st-dev.). The first-derivative is simulated with the RAM error of 0, 0.1, and 2%, respectively, the modulation index is fixed at 3.768 radBack to article page