Observation of Eisenbud–Wigner–Smith states as principal modes in multimode fibre

Carpenter, Joel

doi:10.14264/uql.2015.909

Cited by 41 publications

(60 citation statements)

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“…One of the most promising approaches for unscrambling the transmitted information is by shaping the optical wavefront at the proximal end of the fiber in order to get a desired output at the distal end. Demonstrations include compensation of modal dispersion [3][4][5], focusing at the distal end [6][7][8][9][10], and delivering images [11][12][13] or an orthogonal set of modes [14,15] through the fiber.…”

Section: Introductionmentioning

confidence: 99%

Wavefront shaping in multimode fibers by transmission matrix engineering

et al. 2020

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One of the greatest challenges in utilizing multimode optical fibers is mode-mixing and inter-modal interference, which scramble the information delivered by the fiber. A common approach for canceling these effects is to tailor the optical field at the input of the fiber to obtain a desired field at its output. In this work, we present a new approach which relies on modulating the transmission matrix of the fiber rather than the incident light. We apply computer-controlled mechanical perturbations to the fiber to obtain a desired intensity pattern at its output. Using an all-fiber apparatus, we demonstrate focusing light at the distal end of the fiber and conversion between fiber modes. Since in this approach the number of degrees of control can be larger than the number of fiber modes, it allows simultaneous control over multiple inputs and multiple wavelengths.

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Section: Introductionmentioning

confidence: 99%

Wavefront shaping in multimode fibers by transmission matrix engineering

et al. 2020

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“…Based on the above discussion, we conclude that the modedependent signal delay method does not provide the same information as alternative methods measuring the fiber transfer matrix, e.g., swept wavelength interferometry [15]- [17].…”

Section: E Information Provided By the Input MD Vectormentioning

confidence: 99%

Optimal Launch States for the Measurement of Principal Modes in Optical Fibers

Roudas

Kwapisz

Nolan

2018

J. Lightwave Technol.

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Modal dispersion characterization of multimode optical fibers can be performed using the recently-proposed modedependent signal delay method. This method consists of sending optical pulses using different combinations of modes though the multimode optical fiber and measuring the mode group delay at the fiber output. From these measurements, it is possible to estimate the modal dispersion vector, the principal modes, and their corresponding differential mode group delays.In this paper, we revise and extend the theoretical framework of the mode-dependent signal delay method to include the impact of receiver noise and mode-dependent loss. We compute optimal launch modes, minimizing the noise error in the estimation of the fiber modal dispersion vector. We show that, for a 40mode fiber, the electronic signal-to-noise ratio (SNR) is improved asymptotically by almost 6 dB compared to conventional mode combinations.Index Terms-Modal dispersion, multimode fiber characterization. I. Roudas is with the

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“…As these degrees of freedom are coupled, an MMF provides a versatile and multi-functional platform for communication [3,4], imaging [5][6][7][8] and sensing applications [10][11][12][13][14][15][16]. The abundant spatial degrees of freedom have been utilized for controlling linear [17][18][19][20] and nonlinear light propagation [21][22][23][24][25] in an MMF. The spatial, temporal, spectral or polarization states of transmitted light are manipulated by shaping the spatial wavefront of an incident beam.…”

Section: Introductionmentioning

confidence: 99%

“…The spatial, temporal, spectral or polarization states of transmitted light are manipulated by shaping the spatial wavefront of an incident beam. Hence, an MMF can function as a microscope [5][6][7][8], a reconfigurable waveplate [26] or a pulse shaper [17][18][19][20]. In particular, the coupling between spatial and temporal degrees of freedom in an MMF enables tailoring the output state in time by manipulating the input state in space.…”

Section: Introductionmentioning

confidence: 99%

Multimode-fiber-based single-shot full-field measurement of optical pulses

et al. 2020

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Multimode fibers are widely explored for optical communication, imaging and sensing applications. The interference of fiber guided modes generates a speckle pattern, which has been used for highprecision spectroscopy, temperature, and strain sensing. Here we demonstrate a single-shot full-field temporal measurement technique based on a multimode fiber. The complex spatiotemporal speckle field is created by a reference pulse propagating through the fiber, and it interferes with a signal pulse. From the time-integrated interference pattern, both the amplitude and the phase of the signal are retrieved in spectral and temporal domains. The simplicity and high sensitivity of our scheme illustrate the potential of multimode fibers as versatile and multi-functional sensors.

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Observation of Eisenbud–Wigner–Smith states as principal modes in multimode fibre

Cited by 41 publications

References 0 publications

Wavefront shaping in multimode fibers by transmission matrix engineering

Wavefront shaping in multimode fibers by transmission matrix engineering

Optimal Launch States for the Measurement of Principal Modes in Optical Fibers

Multimode-fiber-based single-shot full-field measurement of optical pulses

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