A device and method for measuring half-wave voltage of an electro-optic phase modulator
An electro-optical phase modulation, half-wave voltage technology, applied in the field of optoelectronics, to achieve stable beat frequency, avoid complex conversion process, and solve the effect of inability to directly detect
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[0060] Adjust the optical carrier frequency ω output by the tunable laser 1 0 =193.1THz, the frequency ω of the frequency shift of the acousto-optic frequency shifter 6 f =70MHz, set the modulation frequency ω of the microwave signal source 5 m =500MHz, observe the center carrier of the tunable laser 1 and its k (k=±1,±2,±3,…) order modulation sidebands and the output frequency of the acousto-optic frequency shifter 6 is 193.1THz±70MHz frequency-shifted light The beat frequency signal of the carrier, the frequency of the beat frequency signal is 70MHz, k×500MHz±70MHz.
[0061] figure 2 In this embodiment, the modulation frequency ω obtained by using the method of measuring the half-wave voltage of the electro-optical phase modulator according to the present invention is m =500MHz, a set of amplitude values of frequencies 70MHz, 500MHz-70MHz, 500MHz+70MHz, 2×500MHz-70MHz, and 2×500MHz+70MHz measured on the spectrum analyzer 9.
[0062] Let k=1, the frequency in the recor...
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