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Combined implementation of controllable beam splitting and wavelength division multiplexing using tunable interference wedged structures
Author(s): Margarita Deneva; Marin Nenchev; Elena Stoykova
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Paper Abstract

The focus of the work is on development and implementation of competitive optical elements based on tunable interference wedged structures. Such a structure can be a single interference wedge (two reflecting surfaces separated by a gap with increasing thickness) or a composition of two or more superimposed wedged layers with adjusted parameters. We used these structures to build a new wavelength division multiplexing (WDM) element and realized coupling of these elements with a fiber optical system as an issue of essential interest for optical communications. Under illumination with a multi-wavelengths beam, the composed WDM structure in the fiber system provides precisely controllable wavelength selection (resolution better than 0.01 nm) within the range of more than 15 nm and with controlled continuously variable transitivity from 1-3 to 80 %. The non-transmitted power with the other non-selected and completely reflected light is directed to the next output (theoretical loss of the system ~ 5 %). The WDM-structure works at completely independent spectral selection of each output/input without any influence between the tuning of the channels.

Paper Details

Date Published: 15 April 2019
PDF: 9 pages
Proc. SPIE 11029, Micro-structured and Specialty Optical Fibres VI, 110290S (15 April 2019); doi: 10.1117/12.2520509
Show Author Affiliations
Margarita Deneva, Technical Univ. of Sofia (Bulgaria)
Marin Nenchev, Technical Univ. of Sofia (Bulgaria)
Elena Stoykova, Institute of Optical Materials and Technologies (Bulgaria)


Published in SPIE Proceedings Vol. 11029:
Micro-structured and Specialty Optical Fibres VI
Kyriacos Kalli; Alexis Mendez; Pavel Peterka, Editor(s)

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