Theoretical demonstration of all-optical switchable and tunable UWB doublet pulse train generator utilizing SOA wavelength conversion and tunable time delay

Hu, Zhijian; Xu, Jian; Hou, Min

doi:10.1007/s12200-017-0711-y

Cited by 7 publications

(4 citation statements)

References 12 publications

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“…Moreover, in most optical UWB signal generation schemes, the derivatives of Gaussian pulse are normally regarded as a kind of reference waveform [6] . And this type of UWB signals are widely used in the optical fiber UWB system (UWB-over-Fiber) [7][8][9][10][11][12][13] .…”

Section: Resultsmentioning

confidence: 99%

An evaluation method of the interference of ultrawideband signals to out-of-band systems

Jiang

Yuan

et al. 2023

14th International Photonics and Optoelectronics Meetings (POEM 2022)

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A method is proposed to evaluate the interference of ultrawideband (UWB) signals to other systems outside its frequency band, by introducing two critical parameters Wob and Pob. These two parameters represent the total bandwidth and total power of the UWB signal to be evaluated exceeding the frequency mask, respectively. Wob is the bandwidth out of the frequency mask limit and Pob is the signal power exceeding the frequency mask. At last, the derivatives of the Gaussian pulse are evaluated up to third order, i.e. monocycle, doublet and triplet, when the original Gaussian pulse width varies from 60 to 350 ps. The results show that the interference introduced to outside band by the UWB signal decreases at first and then increases and finally decreases again, when the original Gaussian pulse width increases. To evaluate an optical UWB signal, this evaluation method should be applied after a simple photoelectric conversion.

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Section: Resultsmentioning

confidence: 99%

An evaluation method of the interference of ultrawideband signals to out-of-band systems

Jiang

Yuan

et al. 2023

14th International Photonics and Optoelectronics Meetings (POEM 2022)

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“…In UWB over fiber system, the primary task is to generate optical UWB signal. Numerous studies on optical UWB signal generation in the optical field have been reported [7][8][9][10] . One of the most common way to generate optical UWB signal is to derive the initial signal pulses with appropriate pulse width under different orders.…”

Section: Introductionmentioning

confidence: 99%

Measurement of the differences between derivatives of typical signal pulses and standard UWB signal waveforms

Jiang

Chen

et al. 2022

Thirteenth International Conference on Information Optics and Photonics (CIOP 2022)

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Three metrics used in error measuring are introduced to measure the differences between the derivatives of typical signal pulses and the derivatives of Gaussian pulse, which is used as the standard ultrawideband (UWB) signals. Derivatives of two kinds of typical initial pulses compared to the standard UWB signal in the same order is evaluated under three reference metrics, when the initial pulses of them have the same pulse width. The results show that, the first metric δ1 changes linearly with the FWHM of the initial pulses TFWHM, while the second one δ2 presents a proportional relation to the square root of TFWHM, and the third one δmax does not change with TFWHM. In addition, the difference between the derivatives of hyperbolic secant pulse and the standard UWB signals are smaller compared to the derivatives of super-Gaussian pulse in the same condition.

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“…Optical delay lines have wide applications in optical communication and microwave photonics systems [1][2][3][4][5][6][7][8]. In optical communication, the main functions of optical delay lines cover signal synchronization, optical buffers, time-division multiplexing, and so forth.…”

Section: Introductionmentioning

confidence: 99%

Tunable optical delay line based on integrated grating-assisted contradirectional couplers

Wang¹,

Zhao²,

Ding³

et al. 2018

Photon. Res.

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Tunable optical delay lines are one of the key building blocks in optical communication and microwave systems. In this work, tunable optical delay lines based on integrated grating-assisted contradirectional couplers are proposed and experimentally demonstrated. The device performance is comprehensively improved in terms of parameter optimization, apodization analysis, and electrode design. Tunable group delay lines of 50 ps at different wavelengths within the bandwidth of 12 nm are realized with a grating length of 1.8 mm. Under thermal tuning mode, the actual delay tuning range is around 20 ps at 7.2 V voltage. At last, a new scheme adopting an ultra-compact reflector for doubling group delay is proposed and verified, achieving a large group delay line of 400 ps and a large dispersion value up to 5.5 × 10 6 ps∕nm · km within bandwidth of 12 nm. Under thermal tuning mode, the actual delay tuning range is around 100 ps at 8 V voltage.

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Theoretical demonstration of all-optical switchable and tunable UWB doublet pulse train generator utilizing SOA wavelength conversion and tunable time delay

Cited by 7 publications

References 12 publications

An evaluation method of the interference of ultrawideband signals to out-of-band systems

An evaluation method of the interference of ultrawideband signals to out-of-band systems

Measurement of the differences between derivatives of typical signal pulses and standard UWB signal waveforms

Tunable optical delay line based on integrated grating-assisted contradirectional couplers

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