We propose a new configuration for using a triangle-wave signal to drive the electro-optic modulator in an electro-optic heterodyne interferometer system. The new configuration is adapted to measure the phase retardation of a wave plate and the optical rotation angle of a chiral medium. By adding optic elements, the second-harmonic component amplitude of the interferometer photodetector output signal became proportional to the phase retardation or optical rotation angle of the samples being tested.
© 2007 Optical Society of America
Instrumentation, Measurement, and Metrology
Original Manuscript: May 22, 2006
Revised Manuscript: January 16, 2007
Manuscript Accepted: January 2, 2007
Published: May 15, 2007
Wen-Kai Kuo, Jen-Yu Kuo, and Cheng-Yung Huang, "Electro-optic heterodyne interferometer," Appl. Opt. 46, 3144-3149 (2007)