 |
Bulgarian Journal of Physics
Print: 1310-0157 Online: 1314-2666
|
RECOGNIZED BY THE EUROPEAN PHYSICAL SOCIETY 
Bulg. J. Phys. vol.26 no.1-2 (1999), pp. 017-022
A Highly Sensitive Fiber-Optic Angular Alignment Scheme
T. Eftimov1, T. Todorov2
1Fiber Optics and Fiber-Optic Sensors Research Laboratory, Institute of Applied Physics, Technical University, 1756 Sofia, Bulgaria
2Higher Machine and Electrical Institute, 1 Ovcha Koupel Blvd, 1618 Sofia, Bulgaria
go back1Fiber Optics and Fiber-Optic Sensors Research Laboratory, Institute of Applied Physics, Technical University, 1756 Sofia, Bulgaria
2Higher Machine and Electrical Institute, 1 Ovcha Koupel Blvd, 1618 Sofia, Bulgaria
Abstract. The principle of operation and behaviour.of a simple, highly sensitive differential fiber-optic angular alignment scheme is reported. Angular misalignments within the range of 10 arcsec and an accuracy of 0.02 arcsec are easily measurable. The scheme allows for the sign of misalignment to be identified and relative measurements to be performed thus reducing noise from power fluctua? tions of the source.