High-Speed Switchable Dual-Passband Microwave Photonic Filter With Dual-Beam Injection in an SMFP-LD

In this paper, a high-speed switchable dual-passband microwave photonic filter (MPF) using a single mode Fabry-Perot laser diode (SMFP-LD) is proposed and experimentally demonstrated. Benefiting from the wavelength selective amplification in the SMFP-LD, the +1 st sideband of two external beams inje...

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Bibliographic Details
Published in:Journal of lightwave technology 2021-12, Vol.39 (24), p.7966-7972
Main Authors: Chen, Hao, Lee, Muyong, Won, Yong Hyub, Nakarmi, Bikash, Pan, Shilong
Format: Article
Language:English
Subjects:
Amplification
Amplitude modulation
Beam injection
High speed
Laser beams
Microwave filters
Microwave photonic filters
Microwave photonics
Optical fibers
optical injection
Optical polarization
Optical switches
Passband
Phase modulation
Semiconductor lasers
SMFP-LD
switch
Switching
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Summary:In this paper, a high-speed switchable dual-passband microwave photonic filter (MPF) using a single mode Fabry-Perot laser diode (SMFP-LD) is proposed and experimentally demonstrated. Benefiting from the wavelength selective amplification in the SMFP-LD, the +1 st sideband of two external beams injected after phase modulation can be amplified in the gain spectrum of the SMFP-LD. Hence, an MPF with two tunable passbands is generated. The switching of the generated passbands is obtained through the switching signal of 1 Gbps applied to the modulator, which controls the power of one of the external beams. By properly setting the external beams' injection parameters, the passbands of MPF can switch from single passband to no passband, single passband to dual passband, and one passband to another passband. In this experiment, the maximum center frequency and tuning range of the passbands is 45.0 GHz and 35.0 GHz, respectively. The out-of-band rejection ratio and 3 dB bandwidth of the proposed filter are 29.62 dB and 83 MHz, respectively.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2021.3080826