Multimode polarization degree of mixture optical states in integrated directional couplers

Autor:	Jesús Liñares, María C. Nistal
Rok vydání:	2012
Předmět:	Physics Photon Multi-mode optical fiber Polarization rotator business.industry Optical space Physics::Optics Optical field Polarization (waves) Atomic and Molecular Physics and Optics Optics Quantum state Power dividers and directional couplers business
Zdroj:	Journal of Modern Optics. 59:61-70
ISSN:	1362-3044 0950-0340
DOI:	10.1080/09500340.2011.639961
Popis:	Mixture multimode optical field classical states propagating in N × N integrated directional couplers are analyzed by using the density matrix formalism in a N-dimensional optical space. These mutimode optical fields present a kind of generalized polarization and accordingly a definition of a multimode polarization degree is proposed. It is based on the distance measure between a mixture state and an unpolarized state in a N-dimensional optical space so that in the case N=2 the standard polarization degree is recovered. It is shown that directional couplers can reduce or increase remarkably the multimode polarization degree of a mixture state. Likewise a simple measurement technique, based on Y junctions, of this multimode polarization degree is proposed. Finally all the results can be formally extended to the special case of multimode single photon quantum states.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::821c7fa403fd3b2d84a5785c352b63ef https://doi.org/10.1080/09500340.2011.639961 Zobrazit plný text záznamu