Abstract
We analyze theoretically and verify experimentally a high-resolution and low-cost method to detect wavelength shift induced by an Erbium-doped fiber Bragg grating. A π-phase-shifted fiber Bragg grating on a temperature controlling setup is employed to achieve tunable single-sideband modulation. To further enhance measurement stability and diminish operational complexity, an asymmetric phase-shifted fiber Bragg grating is developed to reflect wide single-sideband modulation signals and avoid the tuning of the optical carrier wavelength. Through the using of microwave photonics technique, the wavelength shift of the Erbium-doped fiber Bragg grating induced by laser pumping is mapped onto the amplitude variation of the beat signal. The results indicate 1 GHz frequency shift, corresponding to 0.008 nm wavelength shift in the 1550 nm band, is able to be detected. The resolution can be further improved by using a more accurate temperature controlling system. Furthermore, our approach offers an alternative method to detect weak temperature and strain changes on chips or other sensing systems with high accuracy.
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription