Monolithic Add-Drop Multiplexers in Fused Silica Fabricated by Femtosecond Laser Direct Writing

• Type: Article in International Scientific Journal
• Date: 2017

Authors

Amorim, VA (Author) Other; Maia, JM (Author) Other; Alexandre, D (Author) Other; Marques, PVS (Author) FCUP

Journal

Title: Journal of Lightwave Technology

Vol. 35

Pages: 3615-3621

ISSN: 0733-8724

Publisher: Optical Society of America

Indexing

ISI Web of Knowledge - 11 Citations

Scopus - 15 Citations

Other information

Authenticus ID: P-00N-9TH

DOI: 10.1109/jlt.2017.2715118

Abstract (EN): The fabrication of optical add-drop multiplexers in fused silica is demonstrated, for the first time to our knowledge, using the femtosecond laser direct writing technique. To achieve this, a Mach-Zehnder interferometer configuration was used for the signal routing by the implementation of 3-dB directional couplers, along with Bragg grating waveguides for wavelength selectivity. The fabrication of all individual devices required was optimized. The behavior of the fabricated add-drop multiplexer was characterized at around 1550 nm, where a 3-dB bandwidth of 0.19 +/- 0.01 nm was obtained along with an intrachannel and adjacent interchannel crosstalk of -30 and -20 dB at Delta lambda = +/- 0.75 nm, respectively. This study shows that such complex devices can be manufactured by femtosecond laser direct writing, with future improvements being discussed.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7