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We present the investigation on chromatic dispersion characteristics of three orbital angular momentum (OAM) states in 5.58 km ring-core fiber (RCF) link. Steady transmissions of different OAM mode orders spanning from −2 to +2 via the 5.58 km RCF are demonstrated, ensuring the stability of dispersion measuring system. For OAM $_{0,1}^{\;+\;}$, OAM$_{+1,1}^{\;+\;}$, and OAM$_{+2,1}^{\;+\;}$, the...
We demonstrate a novel photonic radio frequency (RF) phase shifter/modulator based on dispersion-induced optical quadrature double-sideband modulation (OQDSB) and differential detection. An optical phase modulator cascaded with a dispersive element is used to implement OQDSB. The OQDSB signal then passes through a dual-output phase-tunable Mazh-Zehnder interferometer, and the two outputs are differentially...
We demonstrate a single-passband chirped microwave photonic filter (MPF) based on phase modulation of a broadband optical source and nonlinear dispersion. Compared to optical intensity modulator, phase modulator has the advantages of low loss, simple structure and absence of bias drift. At the receiver, the optical signal is directly detected due to the phase to intensity modulation (PM-IM) conversion...
Thin film filters (TFFs) are minimum phase filters, and the Hilbert transform law is related to the relationship between a TFF’s amplitude and phase response. It should be possible to obtain the phase response from the amplitude response by this law, but the Cauchy integral is too complex to calculate the phase response directly. In this paper, a method to reconstruct the phase response from the amplitude...
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