Study of an ultrafast analog-to-digital conversion scheme based on diffractive optics

Johansson, Moa; Löfving, Björn; Hård, Sverker; Thylén, Lars; Mokhtari, M.; Westergren, Urban; Pala, C.

doi:10.1364/ao.39.002881

Cited by 24 publications

(8 citation statements)

References 5 publications

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“…Spots are diffracted in complementary positions and Gray-code is generated in order to prohibit incorrect data acquisition. The spot pattern created by the DOEs, as in [9].…”

Section: J'mentioning

confidence: 99%

“…The following analysis is based on a previously published paper [9] and is reported here for completeness.…”

Section: Theorymentioning

confidence: 99%

“…The accuracy of the optical powc:r distribution was treated in [9] where it was shown to be accurare to half a bit in the case studied, given the specific detector configuration. Another important issue is, the accuracy of the wavelength.…”

Section: Eq (12)mentioning

confidence: 99%

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A high-speed electro-optical analog-to-digital converter principle

Pala

Thylén²,

Mokhtari³

et al.

ISCAS 2001. The 2001 IEEE International Symposium on Circuits and Systems (Cat. No.01CH37196)

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In this paper, an electro-optical analog-to-digital converter principle based on a tunable laser and diffractive optics is described and analyzed. The performance of this device is investigated in comparison with an (electronic) parallel analog-todigital architecture and it is shown that this scheme circumvents the scaling laws of electronic parallel converters, by virtue of the passive nature of the translation from wavelength to a binary word.

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“…Spots are diffracted in complementary positions and Gray-code is generated in order to prohibit incorrect data acquisition. The spot pattern created by the DOEs, as in [9].…”

Section: J'mentioning

confidence: 99%

“…The following analysis is based on a previously published paper [9] and is reported here for completeness.…”

Section: Theorymentioning

confidence: 99%

See 1 more Smart Citation

A high-speed electro-optical analog-to-digital converter principle

Pala

Thylén²,

Mokhtari³

et al.

ISCAS 2001. The 2001 IEEE International Symposium on Circuits and Systems (Cat. No.01CH37196)

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“…Optical sampling has also been performed using the photoconductive property of photodiodes [29], [30]. Other optical quantization schemes involving all-optical nonlinear devices [31]- [34], symmetric self-electrooptic effect devices (S-SEEDs) [35], opto-electronic comparators [36], distributed phase modulation [37], and diffractive optics [38] have been investigated. Photonic ADCs based on optical oversampling techniques, such as delta-sigma ( -) architectures, have also been reported [39], [40].…”

Section: Survey Of Optically Sampled Adcsmentioning

confidence: 99%

Optically sampled analog-to-digital converters

Juodawlkis

Twichell

Betts

et al. 2001

IEEE Trans. Microwave Theory Techn.

294

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Optically sampled analog-to-digital converters (ADCs) combine optical sampling with electronic quantization to enhance the performance of electronic ADCs. In this paper, we review the prior and current work in this field, and then describe our efforts to develop and extend the bandwidth of a linearized sampling technique referred to as phase-encoded optical sampling. The technique uses a dual-output electrooptic sampling transducer to achieve both high linearity and 60-dB suppression of laser amplitude noise. The bandwidth of the technique is extended by optically distributing the post-sampling pulses to an array of time-interleaved electronic quantizers. We report on the performance of a 505-MS/s (megasample per second) optically sampled ADC that includes high-extinction LiNbO 3 1-to-8 optical time-division demultiplexers. Initial characterization of the 505-MS/s system reveals a maximum signal-to-noise ratio of 51 dB (8.2 bits) and a spur-free dynamic range of 61 dB. The performance of the present system is limited by electronic quantizer noise, photodiode saturation, and preliminary calibration procedures. None of these fundamentally limit this sampling approach, which should enable multigigahertz converters with 12-b resolution. A signal-to-noise analysis of the phase-encoded sampling technique shows good agreement with measured data from the 505-MS/s system.

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“…Early realizations of photonic ADC's utilized the speed of electrooptic Mach-Zehnder amplitude modulators. Since the ADC represents an essential link between the sensor and signal processor there is again renewed interest in high-speed ADC technology and many novel approaches are currently being investigated [4][5][6][7]. These systems were generally limited in resolution primarily by modulator electrode length, or more specifically the limits imposed by practical values of V, as well as, though to a lesser degree, by RF signal distribution problems.…”

Section: Introductionmentioning

confidence: 99%

<title>Wavelength-based analog-to-digital conversion</title>

et al. 2002

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This paper provides a comprehensive understanding of a tunable wavelength-based photonic high-speed analog-todigital converter (ADC) approach and its anticipated performance. Analytic models, experimental data, and simulation results will provide the fundamental limits on the expected conversion speed and bit resolution. A thorough in situ study of the photonic signal conversion system under simulated space radiation conditions is required to precisely determine its performance in either a natural or man-made space environment. Although this study has not yet been performed on the entire system, preliminary performance predictions will be made based on previously published studies on the individual components within the system. The photonic components of particular interest that will be discussed in the context of radiation hardness include the edge emitting laser diode with a MQW tuning element, the processor filters, the delay equalizers and the photodetectors.

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Study of an ultrafast analog-to-digital conversion scheme based on diffractive optics

Cited by 24 publications

References 5 publications

A high-speed electro-optical analog-to-digital converter principle

A high-speed electro-optical analog-to-digital converter principle

Optically sampled analog-to-digital converters

<title>Wavelength-based analog-to-digital conversion</title>

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