Researching | Switchable microwave photonic filter using a phase modulator and a silicon-on-insulator micro-ring resonator

Journals >Chinese Optics Letters >Volume 18 >Issue 5 >Page 052501 > Article

Chinese Optics Letters
Vol. 18, Issue 5, 052501 (2020)

Switchable microwave photonic filter using a phase modulator and a silicon-on-insulator micro-ring resonator

Simin Li¹, Rong Cong¹, Zhengqian He¹, Tianliang Wang², Fangzheng Zhang^1、*, and Shilong Pan¹

Author Affiliations

¹Key Laboratory of Radar Imaging and Microwave Photonics, Ministry of Education, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

²Shanghai Institute of Satellite Engineering, Shanghai 201109, China

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DOI: 10.3788/COL202018.052501 Cite this Article Set citation alerts

Simin Li, Rong Cong, Zhengqian He, Tianliang Wang, Fangzheng Zhang, Shilong Pan. Switchable microwave photonic filter using a phase modulator and a silicon-on-insulator micro-ring resonator[J]. Chinese Optics Letters, 2020, 18(5): 052501 Copy Citation Text

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Abstract

A switchable microwave photonic filter (MPF) using a phase modulator (PM) and a silicon-on-insulator micro-ring resonator (MRR) is proposed and demonstrated. By adjusting the polarization controller between the PM and the MRR, the filtering function of the MPF can be switched between a band-stop filter and a band-pass filter. In a proof-of-concept experiment, an MPF with a rejection ratio of 30 dB (or 15 dB) for the band-stop (or band-pass) response and a frequency tuning range from 9.6 to 20.5 GHz is achieved.

Keywords

micro-ring resonator microwave photonic filter microwave photonics

| \begin{matrix} E_{x} \\ E_{y} \end{matrix} | \propto | \begin{matrix} [J_{1} (β_{x}) \exp (j ω_{RF} t) + J_{0} (β_{x}) - J_{1} (β_{x}) \exp (- j ω_{RF} t)] \exp (j ω_{c} t) \\ [J_{1} (β_{y}) \exp (j ω_{RF} t + j \frac{2 π Δ n L}{λ_{+ 1}}) + \\ J_{0} (β_{y}) \exp (j \frac{2 π Δ n L}{λ_{0}}) - J_{1} (β_{y}) \exp (- j ω_{RF} t + j \frac{2 π Δ n L}{λ_{- 1}})] \exp (j ω_{c} t) \end{matrix} |,

(1)

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H (ω) = \frac{t_{1} - δ t_{2} \exp (j η)}{1 - δ t_{1} t_{2} \exp (j η)},

(2)

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E_{out} \propto H (ω) | \begin{matrix} \sin α & 0 \\ 0 & \cos α \cdot \exp (j φ) \end{matrix} | | \begin{matrix} E_{x} \\ E_{y} \end{matrix} |,

(3)

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E_{ω_{c}} = H (ω_{c}) [\cos α J_{0} (β_{x}) + \sin α \exp (j ϕ + j \frac{2 π Δ n L}{λ_{0}}) J_{0} (β_{y})] \exp (j ω_{c} t) = H (ω_{c}) {A_{ω_{c}} (α, ϕ, λ_{ω_{c}}) \exp [j θ_{ω_{c}} (α, ϕ, λ_{ω_{c}})]} \exp (j ω_{c} t),

(4)

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E_{+ 1} = H (ω_{c} + ω_{RF}) [\cos α J_{1} (β_{x}) + \sin α \exp (j ϕ + j \frac{2 π Δ n L}{λ_{+ 1}}) J_{1} (β_{y})] \exp [j (ω_{c} + ω_{RF}) t] = H (ω_{c} + ω_{RF}) {A_{\pm 1} (α, ϕ, λ_{+ 1}) \exp [j θ_{\pm 1} (α, ϕ, λ_{+ 1})]} \cdot \exp [j (ω_{c} + ω_{RF}) t],

(5)

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E_{- 1} = - H (ω_{c} - ω_{RF}) [\cos α J_{1} (β_{x}) + \sin α \exp (j ϕ + j \frac{2 π Δ n L}{λ_{- 1}}) J_{1} (β_{y})] \exp [j (ω_{c} - ω_{RF}) t] = H (ω_{c} - ω_{RF}) {A_{\pm 1} (α, ϕ, λ_{- 1}) \exp [j θ_{\pm 1} (α, ϕ, λ_{- 1}) + j π]} \cdot \exp [j (ω_{c} - ω_{RF}) t],

(6)

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I_{pd} = A_{\pm 1} (α, λ_{+ 1}) A_{ω_{c}} (α, λ_{0}) | H (ω_{c} + ω_{RF}) | \cdot \cos [ω_{RF} t + ∠ H (ω_{c} + ω_{RF}) + θ_{\pm 1} (α, φ, λ_{+ 1}) - θ_{ω_{c}} (α, φ, λ_{0})] + A_{\pm 1} (α, λ_{- 1}) A_{ω_{c}} (α, λ_{0}) | H (ω_{c} - ω_{RF}) | \cdot \cos [ω_{RF} t - ∠ H (ω_{c} - ω_{RF}) - θ_{\pm 1} (α, φ, λ_{- 1}) + θ_{ω_{c}} (α, φ, λ_{0}) - π] .

(7)

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{\begin{array}{l} ∠ H (ω_{c} + ω_{RF}) + θ_{\pm 1} (α, φ, λ_{1}) - θ_{ω_{c}} (α, φ, λ_{0}) = - ∠ H (ω_{c} - ω_{RF}) - θ_{\pm 1} (α, φ, λ_{- 1}) + θ_{ω_{c}} (α, φ, λ_{0}) - π \\ A_{\pm 1} (α, λ_{1}) A_{ω_{c}} (α, λ_{0}) | H (ω_{c} + ω_{RF}) | = A_{\pm 1} (α, λ_{- 1}) A_{ω_{c}} (α, λ_{0}) | H (ω_{c} - ω_{RF}) | \end{array} .

(8)

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Simin Li, Rong Cong, Zhengqian He, Tianliang Wang, Fangzheng Zhang, Shilong Pan. Switchable microwave photonic filter using a phase modulator and a silicon-on-insulator micro-ring resonator[J]. Chinese Optics Letters, 2020, 18(5): 052501

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