Chinese Optics Letters, Volume. 17, Issue 3, 030601(2019)
Photonic microwave filters with ultra-high noise rejection [Invited]
Figures & Tables(9)
Fig. 1. Three structures for PMF design. (a) PMF operating at the coherent regime; (b) PMF operating at the incoherent regime; (c) PMF based on the mapping of optical response. (E/O, electro-optic conversion; PD, photodetector.)
Fig. 2. Operation principle for the bandstop PMFs based on the RF cancellation technique.
Fig. 3. Schematic diagram of the bandpass PMF with ultra-high ORR when using the amplified recirculating delay line and windowing technique. (OFS, optical frequency shifter; WDE, wavelength-dependent element; PD, photodetector.)
Fig. 4. Schematic diagram of bandpass PMF with ultra-high ORR when using a Gaussian-shaped optical frequency comb (OFC).
Fig. 5. Operation principles for the bandpass PMFs: the direct spectrum mapping (top) and phase modulation to intensity modulation (PM-IM) conversion (bottom). (OC, optical carrier; OBPF, optical bandpass filter; ONF, optical notch filter.)
Fig. 6. Operation principle of the bandpass PMF using the polarization modulation and polarization pulling effect. Optical spectra of polarization modulation when (a) switching off or (c) switching on the SBS processing. RF spectral responses of the PMF when (b) switching off or (d) switching on the SBS processing.
Fig. 7. Measured RF response of the bandpass PMF with a record high ORR of 80 dB.
Table 1. Selected Bandstop PMFs with Rejection Ratio Higher than 40 dB
View tableView in ArticleTable 1. Selected Bandstop PMFs with Rejection Ratio Higher than 40 dB
PMFs (Ref.) Category Center Frequency or Frequency Coverage (GHz) 3-dB Bandwidth (MHz) Rejection Ratio (NRR, dB) [ 10 ]Periodic 10–40 – 48 [ 11 ]Periodic 0.4 – [ 12 ]Periodic 23.68–24.08 – 49 [ 9 ]Periodic 0–50 – 50 [ 13 ]Periodic 0–12 – [ 14 ]Single 0–20 2500–9500 41 [ 15 ]Single 2–20 38 [ 16 ]Single 2–15 20 51 [ 17 ]Single 1–30 10 [ 18 ]Single 2–20 31 42 [ 19 ]Single 14–20 98 48 [ 20 ]Single 0–30 33–88 [ 21 ]Single 12.4–30.6 12,500 [ 22 ]Single 2–8 250–840 [ 23 ]Single 0–12 150–350 [ 31 ]Single 2–17 240/430 45
Table 2. Selected Bandpass PMFs with an Out-of-band Rejection Ratio Higher than 40 dB
View tableView in ArticleTable 2. Selected Bandpass PMFs with an Out-of-band Rejection Ratio Higher than 40 dB
PMFs (Ref.) Category Center Frequency or Frequency Coverage (GHz) 3-dB Bandwidth (MHz) Rejection Ratio (ORR, dB) [ 24 ]Periodic 0.14 0.44 52/70 [ 25 ]Periodic 9.38 170–800 [ 26 ]Periodic 0–20 – [ 27 ]Periodic 0.05–0.2 – 50 [ 28 ]Periodic 1.1–1.25 0.0375 [ 29 ]Periodic 15–20 2.45 41 [ 30 ]Single 0–20 90 [ 32 ]Single 0–12 740 41 [ 33 ]Single 0–10 1000–3000 57 [ 34 ]Single 9.2 50–200 [ 35 ]Single 2.93 3.15 70 [ 36 ]Single – 100 45 [ 37 ]Single 11.5 650 70 [ 38 ]Single – 650 77 [ 39 ]Single 0–40 16 55 [ 42 ]Single 1.6–2.15 250–1000 44/46 [ 41 ]Single 0–18 42.1 [ 40 ]Single 2.1–6.1 7.7 80
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Xihua Zou, Peixuan Li, Wei Pan, Lianshan Yan, "Photonic microwave filters with ultra-high noise rejection [Invited]," Chin. Opt. Lett. 17, 030601 (2019)
Paper Information
Category: Fiber optics and optical communications
Received: Nov. 2, 2018
Accepted: Dec. 7, 2018
Published Online: Mar. 8, 2019
The Author Email: Xihua Zou (zouxihua@swjtu.edu.cn)
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