An optically driven phased array antenna utilizing heterodyne techniques

Surette, Marc R.; Hjelme, Dag Roar; Mickelson, Alan

doi:10.1109/50.241941

Cited by 13 publications

(2 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When the modulation index is small ( ), the ac optical power transfer function is given by (2) At the small signal bias point, the amplitude of the modulated signal laser at the receiver is (3) where is the power of the transmitter laser, is the signal laser center frequency, is its instantaneous phase, is the modulation index, is the sum of all losses associated with the fiber, is the RIN noise, and is the polarization unit vector. Similarly, the amplitude of the local oscillator laser is (4) where is the optical power of the local oscillator (LO) laser at the receiver, is the center frequency of the LO, is the LO RIN noise, is the instantaneous phase and is the polarization unit vector.…”

Section: System Descriptionmentioning

confidence: 99%

“…M UCH recent work has concentrated on the development of optically coherent high frequency analog fiber optic links for use in subcarrier multiplexed communications [1], optically controlled phased array antennas [2], [3], and the interconnection of microwave systems [4]. Conventionally, these systems have employed direct detection schemes; however recent links utilizing coherent detection have demonstrated large dynamic range and low noise figures [5], [6].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Phase noise in coherent analog AM-WIRNA optical links

Taylor

Poor

Forrest

1997

J. Lightwave Technol.

View full text Add to dashboard Cite

Coherent analog amplitude modulated-wideband rectifier narrowband (AM-WIRNA) systems have been the focus of many recent studies because of their high performance and relative immunity to phase noise compared to angle modulated systems. Despite their natural advantages over angle modulated systems, AM-WIRNA receivers are still vulnerable to phase noise because of distortion of their phase broadened signals in a finite bandwidth system. We present the first numerical analysis of the effects of this distortion on the performance of AM-WIRNA systems. The analysis accurately models the power spectral density of the phase-to-intensity noise with a root-mean-square deviation from the averaged experimental noise spectrum of 1.2 dB and a maximum deviation of 3.8 dB in the modulation range of <2 GHz. The accuracy of the analysis is limited primarily by nonidealities in the AM-WIRNA receiver and the accuracy of the analytical intermediate frequency (IF) filter model. Optimal link designs are presented which minimize the impact of phase-to-distortion noise in AM-WIRNA systems. We present experimental data from AM-WIRNA links which use both external cavity and distributed feedback lasers for the signal and local oscillator sources. The numerical analysis predicts the link signal-to-noise ratio (SNR) for different signal laser powers to within 1.4 dB of experiment. We find that systems requiring high SNR such as phased array antennas and AM-CATV are significantly affected by this noise.

show abstract

Section: System Descriptionmentioning

confidence: 99%