Wavefront sensing techniques for adaptive optics systems
- Resource Type
- Authors
- Mina Ray; S. K. Sarkar; Amitabha Basuray; Rabindra Nath Chakraborty
- Source
- Photonics 2000: International Conference on Fiber Optics and Photonics.
- Subject
- Optical fiber
Materials science
Bromocresol green
business.industry
Polarization-maintaining optical fiber
Cladding (fiber optics)
law.invention
chemistry.chemical_compound
Optics
chemistry
law
pH indicator
Fiber optic sensor
Optoelectronics
Plastic optical fiber
business
Bromocresol purple
- Language
- ISSN
- 0277-786X
The design and fabrication of a fiber optic pH sensor working on the basis of evanescent wave absorption is presented. A pH sensitive dye is immobilized on the uncladded portion of the optic fiber by sol-gel route. The sensitivity of the device is found to increase when multiple sol-gel coatings are used as the cladding in the sensing region. The sensor response and its dynamic range are reported for two pH indicator dyes, vis. bromocresol purple and bromocresol green.