Fast frequency-sweeping Fourier-domain mode-locked optoelectronic oscillator
A Fourier domain mode-locking, optoelectronic oscillator technology, applied in the field of microwave photonics, can solve the problems of energy storage performance degradation, high phase noise of microwave signals, low spectral purity, etc. The effect of improving spectral purity
Active Publication Date: 2018-11-16
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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[0003] At present, most high-performance microwave oscillators are based on electronic or acoustic energy storage. Due to the limitation of the performance of electronic devices, when these energy storage units work at frequencies above GHz, their energy storage performance will drop sharply. Signals with high phase noise and low spectral purity, and typically low center frequency and time-bandwidth product
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[0018] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0019] figure 1 It is a structural schematic diagram of the fast-sweeping Fourier domain mode-locked photoelectric oscillator of the present invention. Such as figure 1 As shown, the present invention provides a fast-sweeping Fourier domain mode-locked optoelectronic oscillator, comprising: a laser 1; a modulator 2, whose input is connected to the output of the laser 1; an adjustable notch filter 3, Its input end is connected with the output end of phase modulator 2; Adjustable notch filter control device 4, its output end is connected with the control input end of adjustable notch filter 3; Photodetector 5, its input end and adjustable The output end of adjustment notch filter 4 is connected; Power amplifier 6, its inp...
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The invention discloses a fast frequency-sweeping fourier domain mode-locked photoelectric oscillator, which comprises a laser device, a modulator, an adjustable notch filter, an adjustable notch filter control device, a photoelectric detector, a power amplifier and an electric coupler, wherein the laser device is used for sending out a single-frequency and continuous optical wave; the modulator is used for modulating the optical wave from the laser device; the modulated signal comprises a photo-carrier, an upper side frequency and a lower side frequency; a notching position corresponds to one modulated side frequency output from the phase modulator; the adjustable notch filter control device is used for periodically adjusting the transmission characteristics of the adjustable notch filter; the photoelectric detector is used for converting a photo-signal output by the adjustable notch filter into an electric signal; an input end of the power amplifier is connected with an output end of the photoelectric detector and is used for amplifying the input signal; the input end of the electric coupler is connected with the output end of the power amplifier; and one output end of the electric coupler is connected with a radio frequency signal modulation port of the modulator, so that a photoelectric oscillating circuit is formed; a microwave is generated; and feedback modulation is carried out on a light in the modulator.
Description
technical field [0001] The invention relates to the technical field of microwave photonics, in particular to a fast-sweeping Fourier domain mode-locked photoelectric oscillator. It is used to generate periodically swept microwave signals with low phase noise, high spectral purity and large time-bandwidth product. Background technique [0002] Microwave signal source is the core component of a microwave system, which can be widely used in wireless communication networks, high-speed optical communication networks, radar, biological imaging and modern instruments. In the above application fields, especially in future communication systems and military radar systems, microwave systems are required to have wide bandwidth, high sensitivity and large dynamic range. To meet these requirements, a high-performance microwave oscillator that can generate microwave signals with high frequency, large frequency tunable range and low phase noise is necessary. For example, in an advanced f...
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IPC IPC(8): H01S1/00
CPCH01S1/00
Inventor 李明郝腾飞唐健石暖暖祝宁华
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI