Photonic beamformer for phased array antennas using a fiber grating prism

Zmuda, Henry; Soref, Richard A.; Payson, Paul M.; Johns, Steven T.; Toughlian, Edward N.

doi:10.1109/68.553105

Cited by 175 publications

(81 citation statements)

References 6 publications

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“…The techniques other than these are based on optical phase shifters [9], switchable delay matrices [10][11][12][13][14], liquid crystal polarization switching devices [15], a combination of a wavelength-tunable laser and a dispersive optical element, such as a high dispersion fiber [16,17], a fiber optic prism [18,19], a fiber Bragg gratings (FBGs) prism [20][21][22], or chirped FBGs [23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Photonic True-Time Delay for Phased-Array Antenna System using Dispersion Compensating Module and a Multiwavelength Fiber Laser

Jeon¹,

Lee²

2014

Journal of the Optical Society of Korea

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An optical true-time delay beam-forming system using a tunable dispersion compensating module (DCM) for dense-wavelength division modulation (DWDM) and a multiwavelength fiber ring laser for a phased array antenna is proposed. The multiwavelength fiber ring laser has one output that includes four wavelengths; and four outputs that include only single-wavelength. The advantage of such a multiwavelength fiber ring laser is that it minimizes the number of devices in the phased array antenna system. The time delays according to wavelengths, which are assigned for each antenna element, are obtained from the tunable DCM. The tunable DCM based on a temperature adjustable Fabry-Perot etalon is used. As an experimental result, a DCM could be used to obtain the change of the beam angle by adjusting the dispersion value of the DCM at the fixed lasing wavelengths of the fiber ring laser in the proposed optical true-time delay.

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Section: Introductionmentioning

confidence: 99%

Photonic True-Time Delay for Phased-Array Antenna System using Dispersion Compensating Module and a Multiwavelength Fiber Laser

Jeon¹,

Lee²

2014

Journal of the Optical Society of Korea

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“…In particular, systems using fiber Bragg reflectors for providing time delays have been proposed and demonstrated by Soref [2] and Zmuda et al [3]. In Ref.…”

Section: Introductionmentioning

confidence: 99%

Performance characteristics of a 5-bit optical receive beamformer

et al. 2003

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This paper describes implemented methods for characterizing a 5-bit programmable dispersion matrix (PDM) that is built to control a two-channel Receive beamformer in the 1550 nm region. The architecture of the PDM, is based on an array of 5 delay lines each having two spliced fiber Bragg gratings. Phase measurements for 32 possible delay configurations of the PMD are presented. Beam-patterns of this Receive beamformer at RF frequencies of 0.2, 0.5 and 1 GHz agrees well with the theoretical calculations. The main lobe of the beam pattern is shown to be independent of frequency for several target positions thus demonstrating a "squint-free" characteristic of this optical processor.

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“…A vector network analyzer is used as a source to drive the RF signal to the EOM and to detect the RF signal from a 20-GHz photodiode. The phase and magnitude of the parameter is compared for each individual channel providing the relation between phase difference and frequency given by (6) where is the phase difference between channels, is an arbitrary constant phase, is the time delay, and is the frequency of the signal. Experimental data is obtained by sweeping the frequency of the network analyzer between 0.2 and 1.6 GHz.…”

Section: System Descriptionmentioning

confidence: 99%