Design and Modeling Analysis of W Band Electro-Optical Phase Modulator

Mingming Zhao; Yuntao He; Xinghua Su; Zhen Tian; Fang Niu

doi:10.3788/AOS201939.0313002

Acta Optica Sinica, Volume. 39, Issue 3, 0313002(2019)

Design and Modeling Analysis of W Band Electro-Optical Phase Modulator

Mingming Zhao¹, Yuntao He^1、*, Xinghua Su², Zhen Tian¹, and Fang Niu¹

Author Affiliations

¹ School of Electronic and Information Engineering, Beihang University, Beijing 100191, China

² Shanghai Institute of Aerospace Electronic Communication Equipment, Shanghai 201109, China

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Figures & Tables(9)

Fig. 1. Cross section of LN-EOM

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Fig. 2. Coplanar waveguide simulation results of millimeter wave EOM. (a) Distribution network of 13×13 nph; (b) trend comparison of 3×13 nph

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Fig. 3. Coplanar waveguide simulation results of millimeter wave EOM. (a) Distribution network of 13×13 Z0; (b) trend comparison of 3×13 Z0

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$Effect of ridge parameters of EOM on millimeter wave equivalent refractive index with differentridge heights (a) and ridge angles (b)$

Fig. 4. Effect of ridge parameters of EOM on millimeter wave equivalent refractive index with differentridge heights (a) and ridge angles (b)

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Fig. 5. Effect of electrode parameters of EOM on attenuation under different electrode spacings (a) and electrode heights (b)

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Table 1. Impedance under different ridge heights and ridge angles
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Table 1. Impedance under different ridge heights and ridge angles
θ /(°) r /μm Impedance /Ω
w=24 μm w=28 μm w=32 μm
0 4.0 46.30 47.91 49.10
0 3.8 46.51 47.33 49.60
0 3.6 44.25 46.76 49.10
0 4.0 46.30 47.91 49.10
10 4.0 45.81 47.92 50.30
30 4.0 44.93 47.87 50.60

Table 2. Results of parameter p

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Table 2. Results of parameter p

r /μm	θ /(°)	p
r /μm	θ /(°)	p₁₁	p₁₂	p₁₃	p₁₄	${p_{21}}_{}$ /10^-4	p₂₂	p₂₃	p₂₄
4.0	0	0.010	-0.878	25.20	-220.6	1.22	-0.009	0.265	-0.223
3.8	0	0.023	-2.040	60.83	-583.3	1.83	-0.014	0.390	-1.288
3.6	0	0.015	-1.377	40.13	-369.5	2.73	-0.022	0.619	-3.518
4.0	10	0.010	-0.916	26.21	-229.9	3.44	-0.028	0.788	-5.058
3.8	10	0.018	-1.623	47.22	-436.8	2.38	-0.019	0.538	-2.753
3.6	10	0.027	-2.474	73.34	-702.2	1.44	-0.011	0.296	-0.412
4.0	30	-0.014	1.382	-42.98	458.8	-2.37	0.021	-0.617	8.114
3.8	30	-0.009	0.954	-30.44	336.9	-2.27	0.003	-0.120	3.538
3.6	30	0.047	-4.272	129.60	-1289.0	1.61	-0.012	0.331	-0.751

Table 3. Partial experimental data of EOM model

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Table 3. Partial experimental data of EOM model

r /μm	θ /(°)
r /μm	0	10	30
4.0	t=27 μm,w=25 μm,n_ph=2.140	t=28 μm,w=25 μm,n_ph=2.140	t=34 μm,w=30 μm,n_ph=2.140
3.8	t=28 μm,w=25 μm,n_ph=2.140	t=33 μm,w=29 μm,n_ph=2.142	t=34 μm,w=29 μm,n_ph=2.140
3.6	t=27 μm,w=24 μm,n_ph=2.138	t=26 μm,w=23 μm,n_ph=2.140	t=32 μm,w=27 μm,n_ph=2.138

Table 4. Performance parameters of the designed EOM and similar modulator in Ref. [21]
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Table 4. Performance parameters of the designed EOM and similar modulator in Ref. [21]
Modulator n_ph ${Z_{0}}_{}$ /Ω ${α_{c}}_{}$ /(dB·cm^-1·GHz^-1/2) ${α_{d}}_{}$ /(dB·cm^-1·GHz^-1) ${V_{π}}_{}$ /V η_mod
Proposed 2.142 47 0.15 0.01 7.0 4.70
In Ref. [21] 2.19 47 0.28 0.01 8.6 3.13

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Mingming Zhao, Yuntao He, Xinghua Su, Zhen Tian, Fang Niu. Design and Modeling Analysis of W Band Electro-Optical Phase Modulator[J]. Acta Optica Sinica, 2019, 39(3): 0313002

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