Frequency-stable photoelectric oscillator based on passive compensation mode and method thereof

Abstract

The invention discloses a frequency-stable photoelectric oscillator based on a passive compensation mode and a method thereof. The frequency-stable photoelectric oscillator based on a passive compensation mode comprises an oscillation loop consisting of a first semiconductor laser, a first Mach-Zehnder modulator, an optical coupler, a long optical fiber, a wavelength division multiplexer, an erbium-doped optical fiber amplifier, a first photoelectric detector, a first microwave band-pass filter, a first microwave amplifier, a microwave frequency multiplier, a second microwave band-pass filter,a second microwave amplifier, a microwave phase shifter and a microwave coupler, and a compensation loop consisting of a second semiconductor laser, a second Mach-Zehnder modulator, an optical coupler, a long optical fiber, a wavelength division multiplexer, a second photoelectric detector, a third microwave band-pass filter, a third microwave amplifier and a microwave coupler. The low-phase-noise and stable high-frequency microwave / millimeter wave signals can be generated, the traditional complex frequency stabilization mode based on electric control feedback does not need to be adopted, andthe method has the advantages of being low in cost, easy to implement and the like.

Description

technical field [0001] The invention relates to the field of microwave / millimeter wave signal generation, in particular to a frequency-stabilized photoelectric oscillator based on a passive compensation method and a method thereof. Background technique [0002] As a microwave signal generator, an optoelectronic oscillator can generate high frequency, low phase noise, tunable microwave / millimeter wave signals. Compared with conventional electrical transmission systems, the core advantages of microwave photonic links are small size, light weight, low attenuation constant over the entire microwave and millimeter wave modulation frequency range, immunity to electromagnetic interference, low dispersion, and high data transmission capacity. In the optoelectronic oscillator, since the refractive index and length of the optical fiber will be affected by the temperature change and vibration of the external environment, the length of the optical loop of the entire optoelectronic oscil...

AI Technical Summary

Problems solved by technology

However, the transmission loss of photonic crystal fiber is large, and it does not match the pigtail of existing devices, and the performance of Fabry-Perot cavity is greatly affected by the environment. These factors limit the application of the above frequency stabilization technology in optoelectronic oscillators.

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