Frequency tunable optoelectronic oscillator based on broadband light source

Abstract

A tunable-frequency photoelectric oscillation device based on a wide spectrum light source comprises the wide spectrum light source, an optical filter, a first light amplifier, a second light amplifier, a first optical fiber coupler, a second optical fiber coupler, a third optical fiber coupler, a first polarization controller, a second polarization controller, a dimming-adjustable delay line, an photoelectric modulator, a color-dispersion optical fiber, a first photoelectric detector, a second photoelectric detector, a microwave amplifier, a first optical fiber patch cord, a second optical fiber patch cord, a third optical fiber patch cord, a fourth optical fiber patch cord, a fifth optical fiber patch cord, a sixth optical fiber patch cord, a seventh optical fiber patch cord, a first cable and a second cable. The tunable-frequency photoelectric oscillation device based on the wide spectrum light source can generate wideband-adjustable microwave signals, adopts a microwave photon filter to replace a traditional point filter, overcomes the defect that a traditional photoelectric oscillator based on wide spectrum source cutting can not generate signals at certain frequency points, and has the advantages of being low in cost, adjustable in wideband, and low in phase noise.

Description

technical field [0001] The invention relates to a device in the field of optical communication and microwave, in particular to a tunable photoelectric oscillation device based on a wide-spectrum light source. Background technique [0002] Microwave signals with low phase noise and adjustable frequency have important applications in wireless communication, optical microwave communication, radar and other applications. Among them, phase noise is one of the main indicators to measure microwave, and it mainly refers to short-term frequency stability. At present, the mainstream solution for generating high-quality microwave signals on the market is to use a quartz oscillator, but the quartz oscillator only has a high-Q oscillation mode at low frequencies. To obtain higher-frequency microwave signals, it is necessary to connect The frequency doubling circuit converts the microwave signal to a high frequency by frequency doubling, but the quality of the microwave signal will conti...

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Problems solved by technology

JianpingYao et al. used modulator cascades, chirped fiber gratings, and phase-shifted fiber Bragg gratings to form a broadband tunable optoelectronic oscillator. However, although the broadband is tunable, the supermode noise is large, and the microwave frequency is affected by the wavelength drift of the laser. (See B.Yang, X.F.Jin, X.M.Zhang, S.L.Zheng, H.Chi, and Y.Wang, "Awidebandfrequency-tunableoptoelectronicoscillatorbasedonanarrowbandphase-shiftedFBGandwavelengthtuningoflaser," IEEEPhoton.Technol.Lett., 24(1), 73–75, 2012)

Later, microwave tunability was realized by using a single-response microwave photon filter structure based on a broadband light source. However, due to the dispersion carrier suppression effect, some frequency points will be suppressed, and continuous tuning of microwave frequencies cannot be achieved (see M. Li, W.Z.Li, J.P.Yao, “Tunable optoelectronicoscillator incorporating a high-Qspectrum-sliced ​​photonic microwave transversal filter,” IEEE Photon. Technol. Lett., 24(14), 1251–1253, 2012)

At the same time, traditional optoelectronic oscillators use electric filters as mode selection devices, and the tuning range of electric filters is limited, so it is difficult for traditional optoelectronic oscillators to achieve broadband tuning

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