Generation of Laser Light via Ultrasonic Four-wave Mixing |
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Authors: | OU Fa Wu Fugen HE Minggao |
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Institution: | 1. Department of Applied Physics, South China University of Technology, Guangzhou 510641, China 2. Department of Applied Physics, Guangdong University of Technology, Guangzhou 510090, China |
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Abstract: | On the basis of the interaction between phonons in ionic crystals with anharmonic lattice vibration, we present a laser model on acoustic nondegenerate four-wave mixing. Two beams of highfrequency ultrasound, incident on the acoustic cavity fulfilled with the medium of ionic crystal, play the role of pumping and one of the two side-band modes of the pumping frequency as an acoustic signal mode has a strong interaction with the optical cavity mode, the coupling-out of which wiIl be the light (far-infrared) output of a laser. The problem is treated with quantum-mechanics. The theory shows that there is the threshold phenomenon as usual lasers and a so called "phase-matching" condition is derived, which should be satisfied for stability of the system. |
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