Chirp Multiplication by Four Wave Mixing for Wideband Swept-Frequency Sources for High Resolution Imaging

Satyan, Naresh; Rakuljic, George; Yariv, Amnon

doi:10.1109/jlt.2010.2051659

Cited by 15 publications

(14 citation statements)

References 12 publications

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“…We believe that through further development of the chirping technique β can be increased to 10 16 Hz/s to offset an increase in ∆ν B . A possible means to achieve linear frequency chirps with even higher chirp rates is by four-wave-mixing [20].…”

Section: Discussionmentioning

confidence: 99%

Suppression of stimulated Brillouin scattering in optical fibers using a linearly chirped diode laser

White¹,

Vasilyev²,

Cahill³

et al. 2012

Opt. Express

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Abstract:The output of high power fiber amplifiers is typically limited by stimulated Brillouin scattering (SBS). An analysis of SBS with a chirped pump laser indicates that a chirp of 2.5 × 10 15 Hz/s could raise, by an order of magnitude, the SBS threshold of a 20-m fiber. A diode laser with a constant output power and a linear chirp of 5 × 10 15 Hz/s has been previously demonstrated. In a low-power proof-of-concept experiment, the threshold for SBS in a 6-km fiber is increased by a factor of 100 with a chirp of 5 × 10 14 Hz/s. A linear chirp will enable straightforward coherent combination of multiple fiber amplifiers, with electronic compensation of path length differences on the order of 0.2 m. ©2012 Optical Society of America

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Section: Discussionmentioning

confidence: 99%

Suppression of stimulated Brillouin scattering in optical fibers using a linearly chirped diode laser

White¹,

Vasilyev²,

Cahill³

et al. 2012

Opt. Express

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show abstract

“…This approach, which is a form of integrated quasi-phase-matching (QPM), uses a sinusoidal width modulation (denoted as w-modulation [94]) to reduce the phase mismatch between co-propagating waves [97]. The approach thus increases the FWM conversion efficiency for signals outside the normal conversion bandwidth of uniform waveguides.…”

Section: Wide-spectral Bandwidth Wavelength-conversion and Shiftingmentioning

confidence: 99%

Squeezing Light in Wires: Fundamental Optical Properties of Si Nanowire Waveguides

Driscoll

Osgood

Grote

et al. 2015

J. Lightwave Technol.

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Single-mode Si-wire waveguides, fabricated in the Si-on-insulator (SOI) platform, are the basis for a growing number of potential applications in linear and nonlinear integrated optical devices and systems. This paper reviews the fundamental optical physics and behavior of these waveguides and demonstrates how their reduced transverse dimensions and index contrast lead to a series of unique and distinct modal properties. These properties include readily tunable waveguide dispersion (including dispersion flattening), large longitudinal fields, a decrease in group velocity over those of the bulk materials, and anisotropic nonlinear optical properties. In turn, new devices and device structures are achievable as a result of these features and examples of new device structures are provided. …………

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“…First, QPM by dispersion-compensation consists of periodically resetting the phase difference between the waves to ensure an ever-increasing idler power. [11][12][13][14] Second, QPM based on modulated nonlinearities relies on modulating the strength of the FWM nonlinearities and realizes an efficiency enhancement by lowering the strength of the FWM interactions when the idler experiences loss, 15,16 or by introducing a nonlinearity-grating that induces an additional phase-mismatch term. [17][18][19] However, all these techniques require light-guiding media with specific characteristics.…”

Section: Introductionmentioning

confidence: 99%

Efficient four-wave mixing by phase-mismatch switching

2014

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Nonlinear four-wave-mixing (FWM) interactions enable a wide variety of photonic functionalities, including wavelength conversion, all-optical switching, signal regeneration, and generation of entangled photons. To achieve efficient FWM interactions the waves either have to be phase-matched, or a quasi-phase-matching (QPM) scheme has to be realized. However, these techniques conventionally require light-guiding media with specific characteristics. We propose a more general QPM scheme for enabling efficient FWM interactions in the presence of a large phase-mismatch. The scheme is based on increasing the distance over which there is FWM gain, while simultaneously decreasing the distance over which there is FWM loss. This is achieved by adiabatically alternating between two phase-mismatch values along the propagation path. We discuss in detail how such phase-mismatch switching (PMS) can be employed to achieve QPM of a FWM process, what the requirements are for optimal FWM efficiency, and how the scheme is impacted by nonlinear dispersion as well as optical losses. Additionally, we describe how QPM by PMS can be implemented with a silicon-on-insulator strip waveguide of which the width is adiabatically varied between two values along the propagation path. By means of numerical simulations, we show that such a waveguide can enhance the wavelength conversion by 20 dB after 1 cm compared to a corresponding constant-width waveguide. For a pump wavelength of 1550 nm, PMS enables efficient conversion (> −21 dB) around a target signal wavelength situated anywhere in the entire near-infrared wavelength domain of 1300-1900 nm.

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Chirp Multiplication by Four Wave Mixing for Wideband Swept-Frequency Sources for High Resolution Imaging

Cited by 15 publications

References 12 publications

Suppression of stimulated Brillouin scattering in optical fibers using a linearly chirped diode laser

Suppression of stimulated Brillouin scattering in optical fibers using a linearly chirped diode laser

Squeezing Light in Wires: Fundamental Optical Properties of Si Nanowire Waveguides

Efficient four-wave mixing by phase-mismatch switching

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