To overcome the beam squint in wide instantaneous frequency, we review a number of system-level optical controlled phase array antennas for beam forming. The optical delay net work based on a fiber device in terms of ...To overcome the beam squint in wide instantaneous frequency, we review a number of system-level optical controlled phase array antennas for beam forming. The optical delay net work based on a fiber device in terms of topological structure of an Mbit optical switch, fiber grating, high-dispersion fiber, and vector-sum technology is discussed, respectively. Lastly, an integrated circuit is simply summarized.展开更多
We propose and demonstrate a photonic approach to instantaneous frequency measurement with an extended range based on phase modulation. In the measurement system, two optical wavelengths and two dispersion fiber segme...We propose and demonstrate a photonic approach to instantaneous frequency measurement with an extended range based on phase modulation. In the measurement system, two optical wavelengths and two dispersion fiber segments are used to construct the frequency-dependent amplitude comparison functions （ACFs）. Several ACFs can be utilized jointly to determine the microwave frequency without ambiguities beyond a monotonic region of the lone conventional ACF. The measurable range of microwave frequency can be extended and the accuracy can be improved by selecting an ACF with a large slope. The experimental results show that the errors are limited within ±140 MHz of a frequency measuremental range from 8 to 20 GHz.展开更多
In this letter, we propose and demonstrate a simple and novel method for fiber chromatic dispersion （CD） measurement based on microwave photonic technique. The radio frequency （RF） signal is modulated simultaneous...In this letter, we propose and demonstrate a simple and novel method for fiber chromatic dispersion （CD） measurement based on microwave photonic technique. The radio frequency （RF） signal is modulated simultaneously on two light-waves with different wavelengths, and the light-wave carrying RF signals transmit through the dispersive medium under test. CD can be obtained by monitoring the power changing of the interference RF signals after photo detector. The CD values of the single-mode and dispersion compensation fibers are both measured within the wavelength range from 1 525 to 1 605 nm, which verifies the feasibility of this method.展开更多
基金supported by the National Natural Science Foundation of China(Nos.61705217 and 61335004)partly supported by the National Key R&D Program of China(No.2016YFC0800504)
文摘To overcome the beam squint in wide instantaneous frequency, we review a number of system-level optical controlled phase array antennas for beam forming. The optical delay net work based on a fiber device in terms of topological structure of an Mbit optical switch, fiber grating, high-dispersion fiber, and vector-sum technology is discussed, respectively. Lastly, an integrated circuit is simply summarized.
基金supported by the National Natural Science Foundation of China(No.60807015)the National"863"Program of China(No.2012AA040406)+1 种基金the Natural Science Foundation of Liaoning Province(No.20102020)the Fundamental Research Funds for the Central Universities
文摘We propose and demonstrate a photonic approach to instantaneous frequency measurement with an extended range based on phase modulation. In the measurement system, two optical wavelengths and two dispersion fiber segments are used to construct the frequency-dependent amplitude comparison functions （ACFs）. Several ACFs can be utilized jointly to determine the microwave frequency without ambiguities beyond a monotonic region of the lone conventional ACF. The measurable range of microwave frequency can be extended and the accuracy can be improved by selecting an ACF with a large slope. The experimental results show that the errors are limited within ±140 MHz of a frequency measuremental range from 8 to 20 GHz.
基金supported in part by the National Natural Science Foundation of China(No.60807015)the Specialized Research Fund for the Doctoral Program of Higher Education(No.200801411037)+1 种基金the Natural Science Foundation of Liaoning Province(No.20102020)the Fundamental Research Funds for the Central Universities(Nos.DUT10ZDG003 and DUT852006)
文摘In this letter, we propose and demonstrate a simple and novel method for fiber chromatic dispersion （CD） measurement based on microwave photonic technique. The radio frequency （RF） signal is modulated simultaneously on two light-waves with different wavelengths, and the light-wave carrying RF signals transmit through the dispersive medium under test. CD can be obtained by monitoring the power changing of the interference RF signals after photo detector. The CD values of the single-mode and dispersion compensation fibers are both measured within the wavelength range from 1 525 to 1 605 nm, which verifies the feasibility of this method.
