From Acoustic Waves to Microwaves
G. Mendes Pachecoa, J.M. Salvi Sakamoto b and C. Kitano c
aDepartment of Microwave and Optoelectronics, Instituto Tecnológico de Aeronáutica, 50, Praça Marechal Eduardo Gomes, São José dos Campos, São Paulo 12228-900, Brazil
bDivision of Photonics, Instituto de Estudos Avançados, Trevo Coronel Aviador José Alberto Albano do Amarante, São José dos Campos, São Paulo 12228-001, Brazil
cDepartment of Electric Engineering, Universidade Estadual Paulista, Campus III, Ilha Solteira, São Paulo 15385-000, Brazil
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We present here some results of our research related to the optoelectronics and photonics and show all the experimental setups used. Starting with a discussion on the importance of the waves, we demonstrate our achievements based on employment of acoustic, optical, and microwaves and their technological use. The results concern the acousto-optic and electro-optic effects. The generalized analysis of the electro-optic effect reveals a new high induced birefringence in lithium niobate. A patented optical fiber microphone is presented, and its applications to the measurements of acoustic wave velocity in gases and in the laser ultrasound non-destructive evaluation system are discussed. Finally, the generation of microwaves by an optical method with substantial cost reduction is presented.

DOI: 10.12693/APhysPolA.127.25
PACS numbers: 43.35.Sx, 42.79.Jq, 51.40.+p, 42.79.-e, 43.35.Zc, 84.40.-x, 85.60.-q