Tunable Multi-Tap Bandpass Microwave Photonic Filter Using a Windowed Fabry-Pérot Filter-Based Multi-Wavelength Tunable Laser

Zhou, Junqiang; Fu, Songnian; Luan, Feng; Wong, Jia Haur; Aditya, Sheel; Shum, Ping; Lee, K. E. K.

doi:10.1109/jlt.2011.2169043

Cited by 37 publications

(20 citation statements)

References 19 publications

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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%

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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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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“…To avoid the instability caused by the optical interference, most of the reported MPFs are based on incoherent schemes [2]. Optical sources with well separated multiple channels, such as combined laser array [1,8,9], spectrum sliced amplified spontaneous emission (ASE) sources including super luminescent diode (SLD) [9][10][11][12], frequency comb sources [13], multi-channel source based on four wave mixing (FWM) [14], and multi-wavelength lasers [15][16][17][18], can be used as the carriers to avoid the interference. But the multiple sources MPF (MSMPF) with sources covering a large spectral range is incompatible and difficult to be integrated with current wavelength division multiplexing (WDM) systems which should limit the signal in a narrow spectral range.…”

Section: Introductionmentioning

confidence: 99%

Gigahertz single source IIR microwave photonic filter based on coherence managed multi-longitudinal-mode fiber laser

Jin¹,

Feng²,

Li³

et al. 2015

Opt. Express

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In this paper, we propose to use a multi-longitudinal-mode (MLM) laser as the source of an infinite-impulse response (IIR) microwave photonic filter (MPF) to obtain GHz level free spectral range (FSR). The response function of such an IIR-MPF and the degree of coherence of the laser are discussed theoretically. The degree of coherence of the MLM laser shows a periodic structure which is significantly different to that of single mode lasers. By engineering the degree of coherence of the MLM laser, we are able to control the stability of the IIR-MPFs with different Q factors. It is found that stable IIR-MPF with GHz level FSR can be realized with an MLM laser and its stability can be enhanced if the coherence of the laser is managed. Based on the theoretical analysis, we fabricate an IIR-MPF based on an MLM erbium doped fiber laser. The impacts of the mode spacing Δν and the bandwidth to the stability are investigated experimentally. A stable IIR-MPF with an FSR of 0.59 GHz is realized and the relative fluctuation of the response curve is optimized to be less than 2%. Besides stable response, the IIR-MPF is reconfigurable by tuning the central wavelength of the laser in a range of 20 nm.

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“…During recent years, multiwavelength fiber lasers have attracted a lot of interest for their potential wide applications in wavelength-division-multiplexing (WDM) communication systems [1], optical fiber sensors [2], optical instrument testing [3], and microwave photonics [4]. The erbium-doped fiber (EDF) is excellent candidate for the gain medium of the lasers as the EDF can provide large gain, high saturation power and low polarization-dependent gain spectrum.…”

Section: Introductionmentioning

confidence: 99%

Switchable dual-wavelength and multi-wavelength erbium-doped fiber laser based on intensity dependent inhomogeneous loss mechanism

Zhang

Yang

et al. 2014

2014 IEEE International Conference on Mechatronics and Automation

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We have proposed and demonstrated an erbiumdoped fiber laser based on intensity dependent inhomogeneous loss mechanism .It mainly consists of an erbium-doped fiber (EDF), a polarization-preserving fiber (PMF), polarization controllers (PCs) and polarization dependent isolator (PDI). The laser can be designed to operate in dual-wavelength or wavelength-switching modes, due to the adjustment of the PCs. Stable operation is achieved at room temperature, with the wavelength interval of the dual-wavelength is 0.6nm. At the same time, a highly-nonlinear fiber (HNLF) has been added in this mechanism to realize 15-lasing lines output, whose average peak power is -17dBm, the sidemode suppression ratio (SMSR) is 29dB, the intensity fluctuation is 1dB and tuning range is 4nm.Index Terms -Switchable dual-wavelength, multi-wavelength fiber laser, highly-nonlinear fiber (HNLF)

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Tunable Multi-Tap Bandpass Microwave Photonic Filter Using a Windowed Fabry-Pérot Filter-Based Multi-Wavelength Tunable Laser

Cited by 37 publications

References 19 publications

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

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

Gigahertz single source IIR microwave photonic filter based on coherence managed multi-longitudinal-mode fiber laser

Switchable dual-wavelength and multi-wavelength erbium-doped fiber laser based on intensity dependent inhomogeneous loss mechanism

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