Abstract
Microwave photonic filters (MPFs) with the capabilities of bandwidth reconfigurability and frequency tunability in the GHz range are of great interest in high-speed communications systems. In this paper, we propose a new reconfigurable multiband microwave photonic filter (MPF) using a tunable Fabry–Perot Filter (FPF). It is demonstrated by numerical simulations that the modification of the intermodal separation (δλ) of a multimode laser diode (MLD) by tunable FPF allows for the reconfigurable multi-passband of the MPF. Our simulation results show that our new filter system is promising to communications systems.
Highlights
Microwave photonic filters (MPFs) with the capabilities of bandwidth reconfigurability and frequency tunability in the GHz range are of great interest in high-speed communications systems
Multiband MPFs have become excellent candidates with their inherent advantages from photonic technologies, such as their low loss, high bandwidth, high tunability, and high reconfigurability [2,3]. They are attractive in optical communication systems because they can be used as electrical carriers to transmit information [4]
We have successfully demonstrated, at the simulation level, a proposal of reconfigurability in the frequency of a passband MPF
Summary
The delivery of services, such as the Internet, High-Definition. Electrical signals are transmitted using photonic devices and optical fiber This multidisciplinary field is possible thanks to high-speed photonic devices operating at microwave or millimeter-wave frequencies in microwave photonic systems [1]. A reconfigurable and application-specific tunable MPF with finite impulse response was reported [7] This filter exploits the differential mode group delays of linearly polarized modes in a multi-mode fiber to achieve single and multiple high-frequency passband responses. When a particular passband is needed, it is necessary to use a particular length of fiber In this new work, we propose a reconfigurable MPF using a tunable FPF in a dynamic way. The free spectral range (FSR) of the FPF is modified by an applied voltage, adjusting the intermodal separation δλ of the MLD In this way, reconfigurability in the frequency of the MPF is achieved.
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