Volume 126, Number 3, May 2019
|Number of page(s)||4|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||04 June 2019|
Characteristics of ultrasonic modulation of coherent light
College of Physics and Energy, Fujian Normal University, Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials - Fuzhou, 350117, China, Fujian Provincial Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices Xiamen, 361005, China and Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Normal University - Fuzhou, 350007, China
Received: 2 February 2019
Accepted: 6 May 2019
We find that the zero-order diffracted light without optical frequency shifts in the Raman-Nath regime is phase-modulated by the ultrasound wave. The finding gives us a chance to reveal the characteristics of ultrasonic modulation of coherent light. We reveal that the temporally periodic variations of ultrasound-modulated light intensity depend on and vary with the ultrasonic power. Additionally, the light intensity varies periodically along the ultrasound beam. Finally, the light intensity varies periodically at twice the ultrasonic frequency for the ultrasound wave of low power.
PACS: 42.30.-d – Imaging and optical processing / 42.68.Sq – Image transmission and formation
© EPLA, 2019
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