Title :
Optical encoder based on rectangular photonic quantum ring laser´s orthogonal polarisation states
Author :
Kim, D.K. ; Lee, E.G. ; Kwon, O´Dae
Author_Institution :
Dept. of Electron. & Electr. Eng., Pohang Univ. of Sci. & Technol.
Abstract :
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
Keywords :
encoding; light polarisation; microcavity lasers; photodetectors; quantum well lasers; ring lasers; optical encoder; orthogonal polarisation states; photonic quantum ring laser; polarised emission states; positional detection;
Journal_Title :
Electronics Letters
