Acoustio- Optic Modulator(AOM)

Résumé

This research investigates how (AOM) work. It is to provide experience in aligning of (AOM), and it is investigates how the intensity of laser beam modulated in time, and it is illustrates the basic properties of the modulator that is measured which include Bragg angle(θB), speed of sound, phase measurement transfer function, and frequency response.[1] The key results which is investigated in this research . The speed of sound in the (AOM) medium is measured to be (1035.5±26.04) m/s, and Bragg angle is (8.15±7.23)˚ which has error percentage about 7.23% error compared with (θB) in AOM manual, and the phase measurement which modulation depth is found to be (93%). The transfer function is found to be sine squared which is identical with theoretical transfer function, and the frequency response of AOM in it is - 3dB is found to be ≈99kHz.