scholarly journals Multipurpose Polymer Bragg Grating-Based Optomechanical Sensor Pad

Sensors ◽  
2019 ◽  
Vol 19 (19) ◽  
pp. 4101
Author(s):  
Steffen Hessler ◽  
Patrick Bott ◽  
Stefan Kefer ◽  
Bernhard Schmauss ◽  
Ralf Hellmann
Keyword(s):  
Low Cost ◽  
Bragg Gratings ◽  
Phase Mask ◽  
Refractive Indices ◽  
Optical Pickup ◽  
Acoustic Instruments ◽  
Low Modulus ◽  
Channel Waveguides ◽  
Krf Excimer Laser ◽  
Sensor Monitoring

Flexible epoxy waveguide Bragg gratings are fabricated on a low-modulus TPX™ polymethylpentene polyolefin substrate for an easy to manufacture and low-cost optomechanical sensor pad providing exceedingly multipurpose application potentials. Rectangular EpoCore negative resist strip waveguides are formed employing standard UV mask lithography. Highly persistent Bragg gratings are inscribed directly into the channel waveguides by permanently modifying the local refractive indices through a well-defined KrF excimer laser irradiated +1/-1 order phase mask. The reproducible and vastly versatile sensing capabilities of this easy-to-apply optomechanical sensor pad are demonstrated in the form of an optical pickup for acoustic instruments, a broadband optical accelerometer, and a biomedical vital sign sensor monitoring both respiration and pulse at the same time.

Bragg Gratings Written in All->tex<$rm SiO_2$>/tex<and Ge-Doped Core Fibers With 800-nm Femtosecond Radiation and a Phase Mask

2004 ◽  
Vol 22 (1) ◽  
pp. 94-100 ◽  
Author(s):  
S.J. Mihailov ◽  
C.W. Smelser ◽  
D. Grobnic ◽  
R.B. Walker ◽  
P. Lu ◽  
...  
Keyword(s):  
Bragg Gratings ◽  
Phase Mask ◽  
Femtosecond Radiation

Development of Low-Cost Abbe Refractometer

2018 ◽  
Vol 879 ◽  
pp. 227-233
Author(s):  
Weeratouch Pongruengkiat ◽  
Thitika Jungpanich ◽  
Kodchakorn Ittipornnuson ◽  
Suejit Pechprasarn ◽  
Naphat Albutt
Keyword(s):  
Refractive Index ◽  
Optical Materials ◽  
Low Cost ◽  
Optical Component ◽  
Refractive Indices ◽  
Constant Number ◽  
Optical Wavelength ◽  
Refractive Index Spectrum ◽  
Transparent Polymers ◽  
Abbe Refractometer

Refractive index and Abbe number are major physical properties of optical materials including glasses and transparent polymers. Refractive index is, in fact, not a constant number and is varied as a function of optical wavelength. The full refractive index spectrum can be obtained using a spectrometer. However, for optical component designers, three refractive indices at the wavelengths of 486.1 nm, 589.3 nm and 656.3 nm are usually sufficient for most of the design tasks, since the rest of the spectrum can be predicted by mathematical models and interpolation. In this paper, we propose a simple optical instrumental setup that determines the refractive indices at three wavelengths and the Abbe number of solid and liquid materials.

scholarly journals Femtosecond inscription of semi-aperiodic multi-notch fiber Bragg gratings using a phase mask

2020 ◽  
Vol 28 (24) ◽  
pp. 35682
Author(s):  
T. A. Goebel ◽  
M. Heusinger ◽  
R. G. Krämer ◽  
C. Matzdorf ◽  
T. O. Imogore ◽  
...  
Keyword(s):  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Phase Mask
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