A heterodyne interference system is developed for base-lines measurement by using an acoustic optical modulator and a stabilized optical-frequency comb. The temporal coherence interference with the optical-frequency comb happen at discrete positions, where a pair of pulse trains overlaps with each other. An optical delay of the interferometer with a piezo-electric transducer is realized to find...

We propose a new method to detect ultrasmall nonreciprocal phase shifts in solids based on the Sagnac interferometer combined with internal optical modulation of the absorption. The Sagnac interferometer with heterodyne balanced detection is expected to enable shot-noise-limited detection of phase shift as a result of its insensitivity to frequency and amplitude fluctuations of the laser. The l...

Articles you may be interested in Improved common-path fast-scanning heterodyne interferometer system as potential dense-plasma diagnostics Rev. Power spectral densities: A multiple technique study of different Si wafer surfaces A prototype imaging second harmonic interferometer Rev. We describe the design of a common-path heterodyne laser interferometer for the surface profiling of micron-size...

Jones matrix computation is one of the widely used methods in nonlinearitycalculation in laser interferometers. In this paper, the nonlinearity error in developedthree-longitudinal mode heterodyne interferometer (DTLMI) has been mathematicallymodeled at various speeds, by using Jones matrix calculations. This review has been donedespite the fact that simultaneously the main factors including no...

We demonstrate an active laser heterodyne interferometer which can automatically compensate environmental disturbances and is capable of precision displacement measurement. Two Zeeman He-Ne lasers were employed. Laser II was used as the light source to stabilize the interferometer by using a piezomirror in a feedback loop. The hetereodyne signal of the two lasers was used to directly calibrate ...

We report a highly sensitive means of measuring cellular dynamics with a novel interferometer that can measure motional phase changes. The system is based on a modified Michelson interferometer with a composite laser beam of 1550-nm low-coherence light and 775-nm CW light. The sample is prepared on a coverslip that is highly reflective at 775 nm. By referencing the heterodyne phase of the 1550-...