Phase encoding method and system based on delay line interferometer
A phase encoding and interferometer technology, applied in the field of phase encoding methods and systems based on delay line interferometers, can solve problems such as complex structures and achieve the effect of reducing components
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Embodiment 1
[0033] Such as figure 2 As shown, the phase encoding system based on the delay line interferometer in this embodiment includes: a first single-wavelength light source (1), a second single-wavelength light source (2), a first wavelength division multiplexer (3), a first Optical coupler (4), signal generator (5), phase modulator (6), optical delayer (7), second optical coupler (8), wave division multiplexer (9), first intensity modulation Device (10), PPG (11), second intensity modulator (12), second wavelength division multiplexer (13), photodetector (14), the specific connection relationship is as follows:
[0034] The first single-wavelength light source (1) and the second single-wavelength light source (2) are respectively connected to two ports of the first wavelength division multiplexer (3) through optical fibers; the first wavelength division multiplexer (3) is connected to the first wavelength division multiplexer (3) The optical coupler (4) is connected through an op...
Embodiment 2
[0037] This embodiment is based on the method for generating the phase encoding signal of the system of Embodiment 1, and the specific steps are as follows:
[0038] Step S1, two single-wavelength light sources generate continuous optical carriers, and the emitted light waves are: E in1 (t)=E 0 exp(jω 1 t),E in2 (t)=E 0 exp(jω 2 t), where E 0 Expressed as the electric field amplitude of the input optical carrier, ω 1 is the center frequency of the optical carrier output by LD1, ω 2 It is the center frequency of the optical carrier output by LD2. After passing through the wavelength division multiplexer, two continuous optical carriers are weighted and superimposed and output a multiplexed optical signal;
[0039] Step S2, the multiplexed optical signal is divided into two identical paths through the optical coupler, the RF signal generated by the RF signal generator is loaded on the phase modulator of the upper branch, and the lower branch is an optical delay device, an...
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