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Optical encoder based on rectangular photonic quantum ring laser's orthogonal polarisation states

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3 Author(s)
Kim, D.K. ; Dept. of Electron. & Electr. Eng., Pohang Univ. of Sci. & Technol. ; Lee, E.G. ; Kwon, ODae

A new type of optical encoder based on linearly polarised light from a photonic quantum ring (PQR) laser is reported. An encoded track of alternating p1- and p2-orthogonally polarised emission states embedded in a zigzag-shaped PQR laser train is read with a polarised photodetector in order to realise a polarisation-resolved positional detection scheme

Published in:

Electronics Letters  (Volume:43 ,  Issue: 3 )