Journal
OPTICS EXPRESS
Volume 20, Issue 7, Pages 7195-7205Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.20.007195
Keywords
-
Categories
Funding
- IMB-CNM (CSIC) [NGG249]
- Fundacion M. Botin
- Ministerio de Educacion of Spain
- Ministerio de Ciencia e Innovacion of Spain
Ask authors/readers for more resources
We present the theoretical and the experimental implementation of an all-optical phase modulation system in integrated Mach-Zehnder Interferometers to solve the drawbacks related to the periodic nature of the interferometric signal. Sensor phase is tuned by modulating the emission wavelength of low-cost commercial laser diodes by changing their output power. FFT deconvolution of the signal allows for direct phase readout, immune to sensitivity variations and to light intensity fluctuations. This simple phase modulation scheme increases the signal-to-noise ratio of the measurements in one order of magnitude, rendering in a sensor with a detection limit of 1.9. 10(-7) RIU. The viability of the all-optical modulation approach is demonstrated with an immunoassay detection as a biosensing proof of concept. (C) 2012 Optical Society of America
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available