An injection-locked millimeter-wave frequency divider based on a self-oscillating optical frequency comb and its frequency division method

Abstract

The invention discloses an injection locking millimeter wave frequency divider based on a self-oscillation optical frequency comb and a frequency division method of the injection locking millimeter wave frequency divider. The frequency divider comprises a photoelectric hybrid oscillator, an optical comb modulator is arranged in an optical link of the photoelectric hybrid oscillator, and a band-pass filter is arranged in an electric link of the photoelectric hybrid oscillator; a millimeter wave signal to be subjected to frequency division is injected into the photoelectric hybrid oscillator; wherein the central frequency of the millimeter wave signal is an integral multiple of the central frequency of the band-pass filter, the optical frequency comb sideband generated by the photoelectric hybrid oscillator and the modulation sideband of the signal to be converted output a fundamental frequency signal in a beat frequency mode, and the fundamental frequency signal is located within the locking bandwidth range of the photoelectric hybrid oscillator. When a super-harmonic signal is injected into the oscillation loop and locked, the frequency division function of the injected millimeterwave signal can be realized, and the frequency divider has the characteristics of wide band, low phase noise and large frequency division ratio.

Description

technical field [0001] The invention relates to a frequency divider suitable for millimeter waves and a frequency division method thereof. It is realized by a self-oscillating optical frequency comb based on an optoelectronic hybrid oscillator structure. The optical frequency comb can generate a fundamental frequency oscillating signal with broadband and low phase noise performance through a clock extraction circuit. When a superharmonic signal is injected into the oscillating loop and locked, the frequency division function of the injected millimeter wave signal can be realized. The frequency divider has the characteristics of broadband, low phase noise and large frequency division ratio, and belongs to the field of microwave photonics. Background technique [0002] The frequency divider is a key device in microwave and millimeter wave circuits, and its function is to achieve integer or fractional frequency division of the frequency of the input signal. Microwave and mill...

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Problems solved by technology

[0007] The traditional injection-locked frequency divider based on the LC oscillator is difficult to achieve a frequency divider with a large frequency division ratio in the high frequency range; although the traditional digital frequency divider can achieve a large frequency division ratio and fractional frequency division, but The bandwidth is limited, the operating frequency is usually a few GHz, and it is difficult to work in a higher frequency range; the frequency divider based on the nonlinear effect of the electro-optical modulator and photodetector in the optoelectronic hybrid oscillator, due to the high-order nonlinear effect It is more difficult, so it is also difficult to achieve a frequency divider with a large frequency division ratio

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