A method of tomographic imaging is proposed in which two-wave mixing in a photorefractive crystal is used with wavelength scanning of a laser diode and phase modulation of the pump beam. This method provides full optical processing and is effective for weak light from objects because of the use of two-wave mixing. The depth resolution of the method was ~1 cm when the wavelength-scanning width was ~0.02 nm .
© 2000 Optical Society of America
Osami Sasaki, Junichi Yamagishi, Takeshi Manabe, and Takamasa Suzuki, "Tomographic imaging by two-wave mixing with a wavelength-scanning laser diode," Opt. Lett. 25, 1174-1176 (2000)