Spectral characterization of integrated acousto-optic tunable filters by means of laser frequency modulation spectroscopy |
| |
Authors: | Di Maio Antonio Salza Mario Gagliardi Gianluca Ferraro Pietro De Natale Paolo |
| |
Affiliation: | CNR-Istituto Nazionale di Ottica Applicata and European Laboratory for Non-Linear Spectroscopy, Naples, Itlay. |
| |
Abstract: | The spectral characteristics of an integrated acousto-optic tunable filter (AOTF) as well as its responsivity to the rf driving signal and sensitivity to temperature changes are experimentally investigated and quantified using a diode-laser-based interrogation system. A spectroscopic technique, exploiting the rf frequency modulation of the laser beam and the phase-sensitive detection of the AOTF transmission, has been used for this purpose. That allows for the generation of a dispersivelike signal, which serves as a reference for tracking any wavelength change of the filter's peak with high resolution. The possibility of using the integrated AOTF as a spectrum analyzer with this interrogation scheme for fiber Bragg grating (FBG) strain sensing is also discussed. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|