Design of polarization-insensitive transmission gratings for optical communication

Wenlong Zou; Feng Zhou; Wu Jianhong

doi:10.1117/12.2500451

8 November 2018 Design of polarization-insensitive transmission gratings for optical communication

Wenlong Zou, Feng Zhou, Wu Jianhong

Proceedings Volume 10818, Holography, Diffractive Optics, and Applications VIII; 108181L (2018) https://doi.org/10.1117/12.2500451
Event: SPIE/COS Photonics Asia, 2018, Beijing, China

Abstract

With the development of optical communication, especially the wide applications of dense wavelength division multiplexing (DWDM) technology, all-optical communication is attracting more and more attention. Wavelength selective switch (WSS) is a new technology, which has the advantage of free switching of individual wavelength. The wavelength division devices play an important role in above mentioned optical communication system. Holographic gratings is one kind of DWDM device, which are characterized by dispersion, high diffraction efficiency and polarization-insensitive. Nowadays, holographic gratings have been widely used in optical communication systems. However, the polarization-insensitive transmission gratings have high aspect ratio structure, which are very hard to transfer the pattern from photoresist mask to substrate (fused silicon). In this paper, the aspect ratio is effectively reduced by adopting LaK9 as substrate with a high index of refraction relatively. The structure parameters of polarization-insensitive gratings should be designed and optimized, such as period, duty cycle and depth. The diffraction efficiency under TE polarization mode and TM polarization mode was discussed respectively in detail in this paper. At the same time, the bandwidth of the designed gratings is discussed. As a result, a proper gratings were designed with high diffraction efficiency (>90%) under TE polarization mode and TM polarization mode, which could be applied in optical communication. The ion etching difficulty is eased by reducing the aspect ratio.

Citation Download Citation

Wenlong Zou, Feng Zhou, and Wu Jianhong "Design of polarization-insensitive transmission gratings for optical communication", Proc. SPIE 10818, Holography, Diffractive Optics, and Applications VIII, 108181L (8 November 2018); https://doi.org/10.1117/12.2500451

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
5 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Diffraction gratings

Diffraction

Optical design

Etching

Optical communications

Polarization

Dense wavelength division multiplexing

Show All Keywords

Keywords/Phrases

Search In:

Publication Years