Wavelength division multiplexing with a self-focusing transmission grating

Stefan Wiechmann; Hans Joachim Heider; Matthias Mahnke; Joerg Mueller

doi:10.1117/12.469649

7 June 2002 Wavelength division multiplexing with a self-focusing transmission grating

Stefan Wiechmann, Hans Joachim Heider, Matthias Mahnke, Joerg Mueller

Proceedings Volume 4653, WDM and Photonic Switching Devices for Network Applications III; (2002) https://doi.org/10.1117/12.469649
Event: Symposium on Integrated Optoelectronic Devices, 2002, San Jose, California, United States

Abstract

An integrated optical wavelength division multiplexer/demultiplexer for the 1.5micrometers telecommunication band is presented using a self-focusing transmission grating as the main dispersive element. The high index contrast between the primary TiO₂ and the secondary Al₂O₃ slab waveguide enables comparatively small devices. In contrast to most other WDM principles like arrayed waveguide gratings or interferometer based devices the optical path may be folded thereby further reducing system dimensions. Plasma assisted metal organic chemical vapor deposition is used to deposit Al₂O₃ and TiO₂ thin films onto oxidized silicon substrates from aluminium acetylacetonate Al(acac) and a prototype precursor cyclopentadienyl-cycloheptatrienyl-titanium CpTiCh, respectively. The grating is realized by an anisotropic plasma etch process. Common input and output channels (respectively input channels and common output for a multiplexer) are numerical aperture matched ridge waveguides and can be coupled to optical fibers. In spite of positioning the outgoing waveguides according to the focal points of the self-focusing grating, the grating itself is designed to meet the layout of the device. The strong impact of the desired arrangement on the grating properties (curvature, size and far field) necessitates a compromise which is found by a hybrid simulation based on the finite element analysis (FEM) and a genetic algorithm.

Citation Download Citation

Stefan Wiechmann, Hans Joachim Heider, Matthias Mahnke, and Joerg Mueller "Wavelength division multiplexing with a self-focusing transmission grating", Proc. SPIE 4653, WDM and Photonic Switching Devices for Network Applications III, (7 June 2002); https://doi.org/10.1117/12.469649

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available