Experimental determination of 2nd order phase matching turning points in long period gratings
- Resource Type
- Conference
- Authors
- Barrington, James H.; Partridge, Matthew; James, Stephen W.; Tatam, Ralph P.
- Source
- 2016 IEEE SENSORS SENSORS, 2016 IEEE. :1-3 Oct, 2016
- Subject
- Components, Circuits, Devices and Systems
Computing and Processing
General Topics for Engineers
Robotics and Control Systems
Signal Processing and Analysis
Couplings
Attenuation
Optical fibers
Turning
Optical frequency conversion
Fiber gratings
Fiber Optics
Long Period Gratings
Phase Matching Turning Point
2nd Order Diffraction
- Language
The fabrication of optical fibre long period gratings (LPGs) displaying 2 nd order resonant bands operating at the phase matching turning point (PMTP) is explored. Previous reports that exploited 2 nd order attenuation bands in sensing schemes did not access the highly sensitive PMTP region. To overcome this limitation, LPGs with periods between 167–177 μm were fabricated using UV irradiation. The spectra acquired were subsequently analyzed and the development of the 2 nd order PMTP was identified utilizing peak tracking software. This work has provided the platform for LPG design focused on the prospect of sensitive multi-parameter discrimination.