A band-pass microwave photonic filter based on Lyot-Sagnac filter and cascaded optical structures

Zhang, Ailing; Huang, Cong; Wu, Xiaojun

doi:10.1007/s11801-014-3056-4

Cited by 9 publications

(4 citation statements)

References 12 publications

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“…In addition, various cascaded filters have also been shown to have better filtering capability and tunability. For instance, two cascaded optical structures consisting of a standard single-mode fiber (SMF) and a fiber ring resonator were used to improve the mainlobe-to-sidelobe suppression ratio and Q-factor [18]. Also, a multichannel fiber filter, consisting of tunable cascaded long-period gratings, was used for multi-wavelength generation [19], and an equivalent Lyot birefringence fiber filter with two cascaded birefringence fibers was used for wavelength spacing switching [20].…”

Section: Introductionmentioning

confidence: 99%

Stable Multi-Wavelength Thulium-Doped Fiber Laser With Two Cascaded Single-Mode-Four-Mode-Single-Mode Fiber Interferometers

et al. 2021

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Section: Introductionmentioning

confidence: 99%

Stable Multi-Wavelength Thulium-Doped Fiber Laser With Two Cascaded Single-Mode-Four-Mode-Single-Mode Fiber Interferometers

et al. 2021

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“…These sensing schemes usually have high sensitivity but it is difficult to manufacture . Beside the MPF based on FBG, MPFs based on fiber ring are also widely used in sensing for their simple structure and high resolution . In these structures, the variation of optical path of the fiber ring is caused by external parameters, and as a result, the frequency response of MPF will be changed.…”

Section: Introductionmentioning

confidence: 99%

“…[13][14][15] Beside the MPF based on FBG, MPFs based on fiber ring are also widely used in sensing for their simple structure and high resolution. [16][17][18] In these structures, the variation of optical path of the fiber ring is caused by external parameters, and as a result, the frequency response of MPF will be changed. By tracing the frequency response shift of the MPF's passband, the external parameters variations can be monitored.…”

Section: Introductionmentioning

confidence: 99%

Temperature sensing scheme based on fiber ring microwave photonic filter with erbium doped fiber amplification

Yang

Xiang

et al. 2019

Micro & Optical Tech Letters

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The temperature sensing scheme based on fiber ring microwave photonic filter (MPF) with erbium doped fiber amplification (EDFA) is proposed and experimentally demonstrated. The fiber ring is used as the time delay element, as well as a sensing element, and by introducing an EDFA to compensate the loss in the fiber ring, the number of the effective sampling taps and thus the suppression ratio are increased. When the EDFA power is set at 0.74 mW, the 3 dB bandwidth of the passband and suppression ratio of the MPF are estimated to be 82.5 kHz, and 15 dB, respectively. The superior sharp passband characteristics make the fiber ring MPF with an EDFA very advantageous for sensing. In our experiment, temperature sensing by using the fiber ring MPF with an EDFA has been carried out for demonstration. The temperature variations induce refractive index changes of the fiber, which will change the time delay of each tap of the fiber ring MPF, and as a result, the FSR of the MPF will be changed. By tracing the peak point shift of the MPF's passband, the temperature variations can be monitored. Our experimental results show that there is a good linear relationship between temperature change and frequency shift, and by measuring passbands with different frequencies, different sensitivity can be obtained. In our experiment, the sensitivity is estimated to be −5.89, −11.74, and − 17.7 kHz/°C, respectively, when the passbands at 0.8, 1.6, and 2.4 GHz are adopted for temperature monitoring.

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“…In particular, for applications like wavelength-division multiplexing (WDM), filtering, and sensing of physical qualities, the parameter quality factor (Q) is very crucial. 4 However, in case of PC slabs with microcavities, radiation losses cannot be avoided, since the translation symmetry is broken. As reported in the literature, conventional microring resonators are attractive devices, since they exhibit less radiation losses and high quality factors.…”

Section: Introductionmentioning

confidence: 99%

Super defect inside photonic crystal ring resonator to enhance Q factor

et al. 2016

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Super defect inside photonic crystal ring resonator to enhance Q factor," Opt. Eng. 55(3), 035103 (2016), Abstract. A design is proposed to enhance the quality factor of a photonic crystal ring resonator. A super defect is employed inside the ring resonator, which consists of variation of hole dimensions inside the ring resonator in such a way that the radiation field components of the resonant nanocavity are forced to get cancelled in order to reduce radiation loss. After this forced cancellation, the improved Q factor is calculated as 18,000. This photonic crystal ring resonator can be used for sensing applications like force sensing, pressure sensing, biochemical sensing, and communication applications like demultiplexing.

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A band-pass microwave photonic filter based on Lyot-Sagnac filter and cascaded optical structures

Cited by 9 publications

References 12 publications

Stable Multi-Wavelength Thulium-Doped Fiber Laser With Two Cascaded Single-Mode-Four-Mode-Single-Mode Fiber Interferometers

Stable Multi-Wavelength Thulium-Doped Fiber Laser With Two Cascaded Single-Mode-Four-Mode-Single-Mode Fiber Interferometers

Temperature sensing scheme based on fiber ring microwave photonic filter with erbium doped fiber amplification

Super defect inside photonic crystal ring resonator to enhance Q factor

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