Apodized silicon photonic grating couplers for mode-order conversion

Iosif Demirtzioglou; Cosimo Lacava; Abdul Shakoor; Ali Khokhar; Yongmin Jung; David J. Thomson; Periklis Petropoulos

doi:doi:10.1364/PRJ.7.001036

Photonics Research, 2019, 7 (9): 09001036, Published Online: Aug. 13, 2019

Apodized silicon photonic grating couplers for mode-order conversion Download： 692次

Iosif Demirtzioglou ^*Cosimo Lacava Abdul Shakoor Ali Khokhar Yongmin Jung David J. Thomson Periklis Petropoulos

Author Affiliations

Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK

Figures & Tables

Fig. 1. 3D concept of the grating-fiber interface for (a) a regular grating pattern and (b) a mode-converting grating pattern (dimensions not to scale). Insets: top view of the gratings.

下载图片查看原文

Fig. 2. (a) Side view of the first four grooves of an apodized grating (SiO2 layer thicknesses not to scale), (b) contour plot of the maximum coupling efficiency with respect to the etching depth and the linear apodization factor R.

下载图片查看原文

Fig. 3. (a) Top view of the middle area of the mode-converting grating, where the right-hand side and left-hand side patterns meet. (b), (c) Schematic representation of Bragg’s law used to calculate the offset d that creates a phase shift of π.

下载图片查看原文

Fig. 4. (a) Simulated coupling efficiency for a regular and a mode-converting grating coupler, (b) intensity profile at the output plane above the grating and phase profile at y=10 μm after conversion of TE0 to out-of-plane TE1 (compatible with LP11).

下载图片查看原文

Fig. 5. (a) Scanning electron microscope (SEM) image of the mode-converting grating (top view), (b), (c) characterization setup and recorded output far-field patterns for waveguides interfaced with a pair of regular gratings and a regular and a mode-converting grating.

下载图片查看原文

Fig. 6. (a) Fiber-to-fiber transmission for the mode-converting device (inset: far-field pattern at the output of the two-mode fiber), (b) extracted (and simulated) coupling efficiency for the mode-converting grating coupler.

下载图片查看原文

Table1. Trench Positions and Sizes

No.	Right		Left
No.	Position (nm)	Size (nm)	Position (nm)	Size (nm)
1	0	61	305	65
2	610	69	916	72
3	1222	76	1528	80
4	1835	84	2143	88
5	2450	92	2759	96
6	3067	100	3377	104
7	3686	108	3996	112
8	4306	116	4617	120
9	4929	124	5241	128
10	5553	132	5865	136
11	6178	140	6492	144
12	6806	149	7121	153
13	7436	157	7751	161
14	8067	165	8384	170
15	8700	174	9018	178
16	9335	183	9654	187
17	9972	191	10292	196
18	10611	200	10932	205
19	11252	209	11574	213
20	11895	218	12218	222
21	12540	227	12864	232
22	13187	236	13512	241

查看原文

Iosif Demirtzioglou, Cosimo Lacava, Abdul Shakoor, Ali Khokhar, Yongmin Jung, David J. Thomson, Periklis Petropoulos. Apodized silicon photonic grating couplers for mode-order conversion[J]. Photonics Research, 2019, 7(9): 09001036.

Apodized silicon photonic grating couplers for mode-order conversion Download： 692次

Fig. 1. 3D concept of the grating-fiber interface for (a) a regular grating pattern and (b) a mode-converting grating pattern (dimensions not to scale). Insets: top view of the gratings.

Fig. 2. (a) Side view of the first four grooves of an apodized grating (SiO2 layer thicknesses not to scale), (b) contour plot of the maximum coupling efficiency with respect to the etching depth and the linear apodization factor R.

Fig. 3. (a) Top view of the middle area of the mode-converting grating, where the right-hand side and left-hand side patterns meet. (b), (c) Schematic representation of Bragg’s law used to calculate the offset d that creates a phase shift of π.

Fig. 4. (a) Simulated coupling efficiency for a regular and a mode-converting grating coupler, (b) intensity profile at the output plane above the grating and phase profile at y=10 μm after conversion of TE0 to out-of-plane TE1 (compatible with LP11).

Fig. 5. (a) Scanning electron microscope (SEM) image of the mode-converting grating (top view), (b), (c) characterization setup and recorded output far-field patterns for waveguides interfaced with a pair of regular gratings and a regular and a mode-converting grating.

Fig. 6. (a) Fiber-to-fiber transmission for the mode-converting device (inset: far-field pattern at the output of the two-mode fiber), (b) extracted (and simulated) coupling efficiency for the mode-converting grating coupler.

Table1. Trench Positions and Sizes

关于本站 Cookie 的使用提示

全站搜索

Apodized silicon photonic grating couplers for mode-order conversion Download： 692次

Fig. 1. 3D concept of the grating-fiber interface for (a) a regular grating pattern and (b) a mode-converting grating pattern (dimensions not to scale). Insets: top view of the gratings.

Fig. 2. (a) Side view of the first four grooves of an apodized grating (SiO2 layer thicknesses not to scale), (b) contour plot of the maximum coupling efficiency with respect to the etching depth and the linear apodization factor R.

Fig. 3. (a) Top view of the middle area of the mode-converting grating, where the right-hand side and left-hand side patterns meet. (b), (c) Schematic representation of Bragg’s law used to calculate the offset d that creates a phase shift of π.

Fig. 4. (a) Simulated coupling efficiency for a regular and a mode-converting grating coupler, (b) intensity profile at the output plane above the grating and phase profile at y=10 μm after conversion of TE0 to out-of-plane TE1 (compatible with LP11).

Fig. 5. (a) Scanning electron microscope (SEM) image of the mode-converting grating (top view), (b), (c) characterization setup and recorded output far-field patterns for waveguides interfaced with a pair of regular gratings and a regular and a mode-converting grating.

Fig. 6. (a) Fiber-to-fiber transmission for the mode-converting device (inset: far-field pattern at the output of the two-mode fiber), (b) extracted (and simulated) coupling efficiency for the mode-converting grating coupler.

Table1. Trench Positions and Sizes

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索