Unlock instant, AI-driven research and patent intelligence for your innovation.

Broadband polarization beam splitter

A polarization beam splitter, broadband technology, applied in instruments, optical waveguides, light guides, etc., can solve problems such as poor TE/TM extinction ratio, long size, bandwidth limitation, etc.

Active Publication Date: 2018-06-26
MARVELL ASIA PTE LTD
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 2×2MMI devices are polarization insensitive and difficult to design
DC-based conventional PBS has one or more of the following problems: long size, bandwidth limitation, and poor TE / TM extinction ratio

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Broadband polarization beam splitter
  • Broadband polarization beam splitter
  • Broadband polarization beam splitter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] The invention relates to a photonic broadband communication device. More specifically, the present invention provides a silicon-based broadband polarization beam splitter. Merely by way of example, the present invention discloses a compact PBS with a silicon multimode interferometric PBS having a high extinction ratio between orthogonally polarized transverse magnetic (TM) and transverse electric (TE) modes and a wavelength between 1530 nm to Low insertion ratios for the integration of silicon photonic circuits over a wide wavelength window of 1560 nm, although other applications are possible.

[0013] figure 1 is a simplified diagram of a general interferometric MMI waveguide-based polarizing beam splitter according to an embodiment of the invention. This diagram is merely an example, which should not unduly limit the scope of the claims. Those of ordinary skill in the art will recognize various changes, substitutions and modifications. As shown, the silicon MMI de...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A broadband polarization beam splitter is provided. The polarization beam splitter includes a silicon waveguide body of a certain thickness in rectangular shape with a width and a length between a first end plane and a second end plane. Two input ports are formed in the first end plane at two separate locations respectively next to two opposing length edges. The silicon waveguide body is configured to generate a plurality of direct or mirror images of an input optical signal provided through at least one of the two input ports. Two output ports are formed in the second end plane, one at a bar-position being configured to output a first output signal substantially in TE polarization mode and another at a cross-position being configured to output a second output signal substantially in TM polarization mode. Preferably, the width is 2.6 [mu]m and the length is 40 [mu]m with the thickness of a silicon layer of a SOI substrate.

Description

technical field [0001] The present invention relates to broadband silicon photonic devices. More specifically, the present invention provides a compact general-purpose interference silicon-based MMI polarization beam splitter with low power consumption and high extinction ratio for a wide band of 1530nm to 1560nm. Background technique [0002] A compact, simple broadband PBS on silicon-on-insulator (SOI) is essential for dense wavelength-division multiplexing (DWDM) within the C-band window. Conventional designs for Si-based PBS are mainly based on two 2x2 MMI devices combined with a Mach-Zehnder interferometer (MZI) device or a directional coupler (DC) device combined with an MZI device. [0003] 2x2MMI devices are polarization insensitive and difficult to design. MZI devices require balanced beam splitting for the transverse magnetic (TM) mode, which remains at the stage of laboratory experiments, which requires thick (greater than 350nm) silicon that does not work well ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/126G02B6/10
CPCG02B6/105G02B6/126G02B6/1228G02B6/125G02B6/2726G02B6/2773G02B6/2813G02B2006/12061
Inventor 林杰
Owner MARVELL ASIA PTE LTD