CN205067786U

CN205067786U - Low -loss waveguide optical divider

Info

Publication number: CN205067786U
Application number: CN201520780289.3U
Authority: CN
Inventors: 苗亮
Original assignee: Yantai Haochen Photoelectric Technology Co Ltd
Current assignee: Hengshui haopen Photoelectric Technology Co., Ltd.
Priority date: 2015-10-09
Filing date: 2015-10-09
Publication date: 2016-03-02
Anticipated expiration: 2025-10-09

Abstract

The utility model discloses a low -loss waveguide optical divider, including input waveguide, the wide waveguide of exhibition and output waveguide, the straight waveguide taper of single mode that the input waveguide was served as reasons and is imported straight waveguide, back taper waveguide and the straight waveguide that narrows down component, the wide waveguide of exhibition is straightening the sharp mould waveguide that the waveguide is formed by gradual waveguide and transition, the output waveguide is symmetrical output's three branch waveguide, and width sudden change department that just is located the branch waveguide of both sides all is equipped with the transition structure of usable dislocation compensation. The utility model discloses an input waveguide replaces traditional straight waveguide with straight waveguide taper, reduces the size of device, the wide waveguide of exhibition does benefit to the wide waveguide of exhibition and tends towards stability, consumption when reducing the beam splitting, the output waveguide is three branch waveguide, has improved the homogeneity and the tolerance nature of device.

Description

Low-loss waveguide optical branching device

Technical field

The utility model relates to integrated optics technique field, particularly relates to a kind of low-loss waveguide optical branching device.

Background technology

Along with popularizing of internet, optical branching device is to forming such as optical user network important role.Y branch waveguide, as one of important optical waveguide unit in optical integrated device, is widely used now.

But because traditional y branch waveguide structure exists patten transformation and radiation loss near take-off point, cause tandem type shunt very long and cause device architecture not compact, Branch Angle is less also proposes very high accuracy requirement to technique.The power division of traditional y branch waveguide is based on the patterns of change shown in Fig. 1 in addition, separates, just realize power dividing function along symmetric part of matrix waveguide when incident mould arrives branch's wedge angle from input waveguide due to the geometry of waveguide.But produce radiation mode because incident basic mode does not mate at branch part with outgoing symmetric mode, cause coupling loss larger.

Utility model content

The purpose of this utility model is the above problem overcoming prior art existence, provides a kind of low-loss waveguide optical branching device.

For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the utility model is achieved through the following technical solutions:

A kind of low-loss waveguide optical branching device, comprise input waveguide, broadening waveguide and output waveguide, described input waveguide is the single mode straight tapered waveguide be made up of input straight wave guide, back taper waveguide and the straight wave guide that narrows, described broadening waveguide is the sharp mould waveguide be made up of Waveguide With Slow-varied Cross Section and transition straight wave guide, described output waveguide is symmetrical three branch-waveguides exported, and width sudden change place being positioned at the branch-waveguide of both sides is equipped with the transition structure that can utilize mis-registry compensation.

Further, the width of described input straight wave guide 11 is 6 μm, described in the narrow width of straight wave guide 13 be 5 μm, the width of described transition straight wave guide 22 is 8 μm, and the branch-waveguide width of described output waveguide 3 is 2 μm.

The beneficial effects of the utility model are:

Input waveguide straight tapered waveguide of the present utility model replaces traditional straight wave guide, reduces the size of device; The waveguide that broadening waveguide is beneficial to broadening tends towards stability, and reduces consumption during beam splitting; Output waveguide is three branch-waveguides, improves homogeneity and the tolerance of device.

Accompanying drawing explanation

Fig. 1 is traditional y branch waveguide structural representation;

Fig. 2 is structural representation of the present utility model;

In figure: 1-input waveguide, 11-inputs straight wave guide, the waveguide of 12-back taper, and 13-narrows straight wave guide, the waveguide of 2-broadening, 21-Waveguide With Slow-varied Cross Section, 22-transition straight wave guide, 3-output waveguide, 4-transition structure.

Embodiment

Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the utility model in detail.

A kind of low-loss waveguide optical branching device, as shown in Figure 2, comprises input waveguide 1, broadening waveguide 2 and output waveguide 3.

Input waveguide 1 to be input straight wave guide 11, back taper waveguide 12 and the width being 6 μm by width be single mode straight tapered waveguide that the straight wave guide 13 that narrows of 5 μm forms, the introducing of back taper waveguide 12 can filtering input end higher order mode, can also improve the homogeneity of output simultaneously and reduce signal displacement to the impact of output uniformity.

Broadening waveguide 2 is the sharp mould waveguide that the transition straight wave guide 22 being 8 μm by Waveguide With Slow-varied Cross Section 21 and width forms, and the introducing of Waveguide With Slow-varied Cross Section 21 makes the slow broadening of input light field, and necessary preparation is carried out in the beam splitting for light field; Transition straight wave guide 22 makes the waveguide of broadening more tend towards stability, and reduces consumption during beam splitting.

Output waveguide 3 is three branch-waveguides that the symmetrical width exported is 2 μm, and width sudden change place being positioned at the branch-waveguide of both sides is equipped with the transition structure 4 that can utilize mis-registry compensation, reduces coupling loss.

Claims

1. a low-loss waveguide optical branching device, comprise input waveguide (1), broadening waveguide (2) and output waveguide (3), it is characterized in that: described input waveguide (1) is by input straight wave guide (11), the single mode straight tapered waveguide that back taper waveguide (12) and the straight wave guide that narrows (13) form, described broadening waveguide (2) is the sharp mould waveguide be made up of Waveguide With Slow-varied Cross Section (21) and transition straight wave guide (22), described output waveguide (3) is symmetrical three branch-waveguides exported, and width sudden change place being positioned at the branch-waveguide of both sides is equipped with the transition structure (4) that can utilize mis-registry compensation.

2. low-loss waveguide optical branching device according to claim 1, it is characterized in that: the width of described input straight wave guide (11) is 6 μm, the width of the described straight wave guide that narrows (13) is 5 μm, the width of described transition straight wave guide (22) is 8 μm, and the branch-waveguide width of described output waveguide (3) is 2 μm.