Title :
Wideband Fiber-Interferometer Stabilization With Variable Phase
Author :
Rosenthal, Amir ; Kellnberger, Stephan ; Sergiadis, George ; Ntziachristos, Vasilis
Author_Institution :
Inst. for Biol. & Med. Imaging, Tech. Univ. of Munich, Neuherberg, Germany
Abstract :
We report on a robust scheme for wideband variable-phase interferometer stabilization based on active modulation. In contrast to previous schemes, the correction signal is generated without using second harmonics, whose low amplitude often requires employing narrowband lock-in amplifiers. Resonances in the element modulating the phase are attenuated to enable high gain without high-frequency oscillations. Operation over a 3-kHz bandwidth is demonstrated.
Keywords :
Michelson interferometers; optical fibre amplifiers; optical fibre polarisation; optical modulation; oscillations; active modulation; correction signal generation; high-frequency oscillations; narrowband lock-in amplifiers; phase resonances; wideband variable-phase interferometer stabilization; Adaptive optics; Bandwidth; Harmonic analysis; Optical feedback; Optical fibers; Optical interferometry; Feedback circuits; interferometry; optical fibers;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2012.2207099
