Noise reduction of supercontinua via optical feedback

Brauckmann, Nicoletta; Kues, Michael; Groß, P.; Fallnich, Carsten

doi:10.1364/oe.19.014763

Cited by 15 publications

(7 citation statements)

References 28 publications

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“…13 Although the generation of the SC light by the PCF provides low-cost systems, easy handling, and adjustment of the optics, rendering the additional pump light source and an optical amplifier unnecessary, the SC pulsed light is significantly unstable and can result in very high levels of source-induced noise, [14][15][16][17][18] which is a serious obstacle to high-speed multi-color imaging applications. To overcome this problem, the nature of the noise has been studied [14][15][16][17][18] and several noise reduction methods [19][20][21] have been developed.…”

Section: Introductionmentioning

confidence: 99%

Development of a balanced detector with biased synchronous detection and application to near shot noise limited noise cancelling of supercontinuum pulse light

Seto

Tsukada

Okuda

et al. 2014

Review of Scientific Instruments

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We report on the development of a balanced detector suited for multicolor imaging. The source pulsed light is split into probe and reference pulsed light. The reference pulse is delayed through an optical path and the probe and reference pulses are detected by a single photodetector. The signs of the detected signals of the probe and reference pulses are flipped based on a signal synchronous to the light source. Then, the signals are averaged through a low-pass filter. The output signal is proportional to the intensity difference between the probe and the reference. This balanced detector has two features: (1) both the probe and reference pulsed lights are detected by a single photodetector and (2) a voltage bias on the sign flipping compensates for the optical-intensity unbalance between the probe and reference pulsed lights. The first feature enables the probe and reference pulses to travel along a common optical path from a sample through a spectrograph to the photodetector, which minimizes the intensity unbalance between the probe and reference pulses during imaging and spectroscopy. The second feature ensures the complete balanced-detection in whole wavelength range by compensating for the optical unbalance created by deviations in the splitting ratios of the probe and reference lights at different wavelengths. Although a higher signal to noise ratio (SNR) reached to near shot noise limited SNR is attained by attaching a resonator to the photodetector for pulse repetition, the electrical bias cannot compensate for the optical balance. This unbalance is, however, corrected by adjusting the phase of the synchronous signal. We applied the present balanced detection to a stimulated Raman microscope with supercontinuum probe light and demonstrated its noise cancelling performance through capturing polystyrene beads.

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Section: Introductionmentioning

confidence: 99%

Development of a balanced detector with biased synchronous detection and application to near shot noise limited noise cancelling of supercontinuum pulse light

Seto

Tsukada

Okuda

et al. 2014

Review of Scientific Instruments

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“…We characterize the spectral amplitude and phase of the pulses in both regimes at a repetition rate of 75. 6 Passive ring cavities [1] have attracted renewed interest in recent years [2][3][4][5][6][7], being applied for example, to noise reduction in supercontinuum (SC) generation [2], the tailoring of SC spectra [3,4], and frequency comb generation [5]. They can also exhibit complex shot-to-shot dynamics, ranging from period doubling to chaos [1,6,7], which is of interest in applications such as secure telecommunications [8,9].…”

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confidence: 99%

Single-shot reconstruction of spectral amplitude and phase in a fiber ring cavity at a 80 MHz repetition rate

et al. 2016

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Femtosecond pulses circulating in a synchronously driven fiber ring cavity have complex amplitude and phase profiles that can change completely from one round-trip to the next. We use a recently developed technique, combining dispersive Fourier transformation) with spectral interferometry, to reconstruct the spectral amplitude and phase at each round-trip and, thereby, follow in detail the pulse reorganization that occurs. We focus on two different regimes: a period-two regime in which the pulse alternates between two distinct states and a highly complex regime. We characterize the spectral amplitude and phase of the pulses in both regimes at a repetition rate of 75.6 MHz and find good agreement with modeling of the system based on numerical solutions of the generalized nonlinear Schrödinger equation with feedback.

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“…Commonly used with pulsed sources, this approach allows for arbitrary pump pulse durations and shapes as well as large values of temporal walk-off τ between the round-trip time and the pump pulse repetition period [14]. In contrast, the LL model relies on a single partial differential equation for the mean field, and is hence computationally much less demanding and more amenable to analysis.…”

mentioning

confidence: 99%

“…Passive fiber ring cavities are simple devices that can exhibit extremely rich nonlinear dynamics, as first reported by Kensuke [7] and thoroughly investigated over the past three decades [8][9][10][11][12]. From the experimental point of view, the advent of photonic crystal fiber (PCF) as a nonlinear element has sparked new interest in this established field due to the possibility of adjusting dispersion and nonlinearity into previously inaccessible parameter ranges [13][14][15]. Two approaches have previously been used for theoretical modeling of such cavities: the Ikeda-map formalism [7] (IMF) and the Lugiato-Lefever (LL) approach [16].…”

mentioning

confidence: 99%

Spontaneous symmetry breaking in photonic crystal fiber ring cavities

Schmidberger

Novoa

Biancalana

et al. 2013

Frontiers in Optics 2013

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We introduce a new equation that describes the spatio-temporal evolution of arbitrary pulses propagating in a fiber-ring cavity. This model is a significant extension of the traditionally used Lugiato-Lefever model. We demonstrate spontaneous symmetry breaking as well as multistability regimes in a synchronously pumped fiber-ring cavity. The equation can be applied to virtually any type of waveguide-based ring cavity.

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Noise reduction of supercontinua via optical feedback

Cited by 15 publications

References 28 publications

Development of a balanced detector with biased synchronous detection and application to near shot noise limited noise cancelling of supercontinuum pulse light

Development of a balanced detector with biased synchronous detection and application to near shot noise limited noise cancelling of supercontinuum pulse light

Single-shot reconstruction of spectral amplitude and phase in a fiber ring cavity at a 80 MHz repetition rate

Spontaneous symmetry breaking in photonic crystal fiber ring cavities

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