Comparison of an in-line asymmetric directional coupler modulator with distributed optical loss to other linearized electrooptic modulators

Hamilton, Scott A.; Yankelevich, Diego R.; Knoesen, A.; Weverka, Robert T.; Hill, Richard A.

doi:10.1109/22.775456

Cited by 9 publications

(4 citation statements)

References 33 publications

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“…Optical linearization techniques involving multiple interferometers connected in series or parallel configurations have demonstrated SFDR performance close to theoretical limits, but often have limited bandwidth and are complex to implement [41], [42]. Work has also been done to modify the electrical signal before applying it to the modulator so that the limiting odd-order nonlinear terms are greatly suppressed [43], [44].…”

Section: A Overviewmentioning

confidence: 97%

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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Section: A Overviewmentioning

confidence: 97%

Optically sampled analog-to-digital converters

Juodawlkis

Twichell

Betts

et al. 2001

IEEE Trans. Microwave Theory Techn.

294

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show abstract

“…Interferometric conversion of the phase modulation to intensity modulation can also be accomplished in a Fabry-Perot cavity or other type of optically resonant structure [29]. Additionally, guide/antiguide structures [30] can be realized in such a way that the electro-optic effect determines how much light is coupled out of the waveguide -and therefore also how much of the light remains guided. Neither resonant interferometric nor guide/antiguide modulators, however, have matured to the point of commercial availability.…”

Section: What Modulation Technique To Usementioning

confidence: 99%

Analogue Microwave Fibre‐Optic Link Design

Iezekiel

2009

Microwave Photonics

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“…5%) can be acceptable for analog modulators. 5 RF-photonic links have a variety of attractive features for radar applications, but it is important that the analog modulator has a large dynamic range. In a radar application, targets are being tracked over large distances, and the amplitude of return signals must be tracked over a very large range.…”

Section: In-line Fiber Modulatorsmentioning

confidence: 99%

“…The in-line modulator has the potential to provide a SFDR competitive with more complicated solutions involving multiple Mach-Zehnder modulators. 5 An in-line asymmetric directional coupler modulator (ADCM) is an asymmetric directional coupler (ADC) consisting of two waveguides placed in close proximity. The two waveguides can be of dissimilar shape and/or material.…”

Section: In-line Fiber Modulatorsmentioning

confidence: 99%

In-Line Fiber Evanescent Field Electrooptic Modulators

Arft

Yankelevich

Knoesen

et al. 2000

J. Nonlinear Optic. Phys. Mat.

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Electrooptic modulators that consist of an optical fiber waveguide coupled to an electrooptic waveguide are reviewed. Desirable attributes of these devices are that the optical fiber is uninterrupted and the interaction with the electrooptic region occurs only where the optical properties are modulated. In this paper we review in-line fiber evanescent field modulators that we have implemented with electrooptic polymers and compound semiconductor quantum wells. We show that the beam propagation method can accurately simulate the behavior measured in these devices.

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Comparison of an in-line asymmetric directional coupler modulator with distributed optical loss to other linearized electrooptic modulators

Cited by 9 publications

References 33 publications

Optically sampled analog-to-digital converters

Optically sampled analog-to-digital converters

Analogue Microwave Fibre‐Optic Link Design

In-Line Fiber Evanescent Field Electrooptic Modulators

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