A method and device for multi-octave phase shifting
A multi-octave, phase-shifting technology, applied to electrical components, electromagnetic wave transmission systems, transmission systems, etc., can solve the problems that affect the accuracy of phase shifting, do not apply to multi-octave links, and spectrum overlap cannot use filters. Achieve the effect of improving accuracy and eliminating the influence of second-order distortion
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Embodiment 1
[0048] Embodiment 1 of the present invention provides a multi-octave phase-shifting method, such as figure 1 As shown, the method includes the following steps:
[0049] Step 101, signal modulation is performed on the optical carrier to generate a beam of orthogonally polarized light; the first-order sideband phase factors of the orthogonally polarized light beam are opposite to each other and the second-order sideband phase factors are the same in two mutually orthogonal polarization directions.
[0050] Wherein, as a possible implementation manner, the signal modulation includes signal processing methods such as polarization modulation and filtering.
[0051]Step 102, dividing the beam of orthogonally polarized light into a first sub-orthogonal-polarized light and a second sub-orthogonal-polarized light;
[0052] Step 103, respectively converting the first sub-orthogonal polarized light and the second sub-orthogonal polarized light into first circularly polarized light and s...
Embodiment 2
[0057] Embodiment 2 of the present invention provides a preferred embodiment of a multi-octave phase shifting method.
[0058] see figure 2 In the shown optical path, in this embodiment, first, a beam of orthogonally polarized light is generated through signal processing methods such as polarization modulation and filtering; the beam of orthogonally polarized light has a first-order The phase factors of the sidebands are opposite, and the phase factors of the second-order sidebands are the same. The electric field of the orthogonally polarized light can be expressed as
[0059]
[0060] where x and y denote two mutually orthogonal polarization directions, E x and E y Represent the electric field of the orthogonally polarized light in the x direction and y direction, m is the modulation factor, ω is the angular frequency of the light source, Ω is the angular frequency of the radio frequency signal that needs to be phase shifted, J n (m) is a Bessel function of the first...
Embodiment 3
[0078] Embodiment 3 of the present invention provides a multi-octave phase shifting device, such as figure 2 As shown, the phase shifting device includes: a signal modulation unit ( figure 2 not shown in), the first polarization controller PC1, the second polarization analyzer controller PC2, the first analyzer Pol1, the second analyzer Pol2 and the balance detector BPD.
[0079] The signal modulation unit generates a beam of orthogonally polarized light (a) through signal processing methods such as polarization modulation and filtering; the beam of orthogonally polarized light (a) has a first-order sideband phase in two mutually orthogonal polarization directions The factors are opposite. The phase factors of the second order sidebands are the same. Afterwards, the orthogonally polarized light (a) is evenly divided into two parts to obtain the first sub-orthogonal-polarized light (b) and the second sub-orthogonal-polarized light (c).
[0080] The first polarization contr...
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