Generation of Arbitrary UWB Waveforms by Spectral Pulse Shaping and Thermally-Controlled Apodized FBGs

Abtahi, Mohammad‐Ali; Dastmalchi, Mansour; LaRochelle, Sophie; Rusch, Leslie A.

doi:10.1109/jlt.2009.2031128

Cited by 37 publications

(12 citation statements)

References 20 publications

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“…In [14], the strong residual LO signal was suppressed using an intensity modulation scheme with high extinction ratio. However, the baseband frequency components were still existed, which can be eliminated by time-domain Bbackground-subtraction[ method using a balanced PD [15]. Other techniques reported in [16]- [18] can suppress the strong residual LO signal and the baseband frequency components at the same time by means of optical frequency shift keying modulation [16] or optical switch [17], [18].…”

Section: Introductionmentioning

confidence: 99%

Photonic Generation of Ultrawideband Signals With Large Carrier Frequency Tunability Based on an Optical Carrier Phase-Shifting Method

Wang

Zheng

et al. 2013

IEEE Photonics J.

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We theoretically and experimentally demonstrated a novel photonic approach to generating ultrawideband (UWB) pulses with large carrier frequency tunability based on an optical carrier phase-shifting technique by cascading polarization modulators (PolMs) and a polarizer. The UWB pulses are generated by truncating a continuous wave (CW) RF signal into a pulsed signal in a photodetector (PD). The experimental results show that the baseband frequency components and the strong residual local oscillator (LO) signal are well suppressed. In addition, the generated UWB signals satisfy the Federal Communications Commission (FCC) spectral mask very well.

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Section: Introductionmentioning

confidence: 99%

Photonic Generation of Ultrawideband Signals With Large Carrier Frequency Tunability Based on an Optical Carrier Phase-Shifting Method

Wang

Zheng

et al. 2013

IEEE Photonics J.

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“…We show that a less restrictive far-field criterion -the "antenna designer's formula" [14,15] works well to account for the minimum dispersion amount required to observe the frequencyto-time transformation. This new criterion permits to optimize the design of the RF-AWG based on frequency-to-time mapping [6,12,13,[16][17][18] in terms of maximally achievable bandwidth.…”

Section: Introductionmentioning

confidence: 99%

Dispersion requirements in coherent frequency-to-time mapping

2011

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Abstract:The frequency-to-time mapping technique (also known as the temporal far-field phenomenon) usually requires a significant amount of dispersion to stretch an ultrashort optical pulse so that the intensity profile becomes a scaled replica of its optical spectrum. In this work, we study the near-to-far-field transition and find that the far-field condition can be relaxed in some cases relevant for radio-frequency (RF) waveform generation. This observation has allowed us to achieve intensity signals with an ultrabroad RF bandwidth content. ©2011 Optical Society of America

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“…The capability to manipulate and/or measure the spectral information of an ultrashort pulse in the temporal domain has found interesting applications in fields as diverse as spectroscopy [4,5], imaging [6][7][8], optical communications [9,10], pulse shaping [11], and arbitrary radio-frequency waveform generation (RF-AWG) [12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Coherent frequency-to-time mapping revisited: Breaking the Fraunhofer limit to achieve ultrabroad radio-frequency waveforms

Torres-Company

Leaird

Weiner

2011

2011 International Topical Meeting on Microwave Photonics Jointly Held With the 2011 Asia-Pacific Microwave Photonics Conferenc

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In this contribution, we revisit the criteria required to achieve the well-known frequency-to-time mapping phenomenon. It is found that the popular far-field inequality is too restrictive when applied to most of the waveforms of interest in radiofrequency arbitrary waveform generation. A new condition based on notions borrowed from the field of antenna engineering is investigated. This "antenna designer's formula" sets a more precise limit on the minimum dispersion required for the frequency-to-time mapping to occur. Numerical and experimental results show how spectrally engineered waveforms are mapped into the time domain using dispersion amounts smaller than expected. These results pave the way to synthesize electromagnetic pulses with ultrabroad frequency content using coherent frequency-to-time mapping.

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Generation of Arbitrary UWB Waveforms by Spectral Pulse Shaping and Thermally-Controlled Apodized FBGs

Cited by 37 publications

References 20 publications

Photonic Generation of Ultrawideband Signals With Large Carrier Frequency Tunability Based on an Optical Carrier Phase-Shifting Method

Photonic Generation of Ultrawideband Signals With Large Carrier Frequency Tunability Based on an Optical Carrier Phase-Shifting Method

Dispersion requirements in coherent frequency-to-time mapping

Coherent frequency-to-time mapping revisited: Breaking the Fraunhofer limit to achieve ultrabroad radio-frequency waveforms

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