In this letter, a novel scheme for a wavelength-tunable pulse source (WTPS) is proposed and characterized. It is based on four-wave mixing (FWM) in a newly developed highly nonlinear fiber between a return-to-zero (RZ) pulsed signal at a fixed wavelength and a continuous wave probe tunable in wavelength. The corresponding FWM product acts as the WTPS, and is implemented in a 10-Gb/s, 160-km transmission experiment and in a 40-Gb/s multiplexing/demultiplexing experiment. The scheme can be expanded to a multiwavelength WTPS, which is demonstrated for two wavelengths. The introduced penalty using the WTPS compared to the original RZ pulses is negligible.

Four-wave mixing

Zero-dispersion wavelength

SIGNAL (programming language)

10.1109/68.903224

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Citations (16)

Ultra-fast phase comparator for optoelectronic clock recovery PLL-based systems

HAL (Le Centre pour la Communication Scientifique Directe) (2009)

F. Gómez Agis Leif Katsuo Oxenløwe Sunao Kurimura Cédric Ware Hans Christian Hansen Mulvad

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Recent Progress on Optical Regeneration of Wavelength-Division-Multiplexed Data

IEEE Journal of Selected Topics in Quantum Electronics (2020)

Pallavi G. Patki Pengyu Guan Lu Li Taras I. Lakoba Leif Katsuo Oxenløwe

Practical applications of all-optical regeneration require from it a graceful scalability with the number of wavelength-division-multiplexed (WDM) channels. We describe several main approaches to WDM-compatible regeneration and review in greater detail two recent demonstrations of 16-channel regeneration: one using time-lensing and the other using group-delay-management. We discuss scalability, practical issues, and outlook for these WDM regeneration methods.

10.1109/jstqe.2020.3025482

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Citations (18)

Ultra Fast All-Optical Signal Processing in Semiconductor and Fiber Based Devices

H.N. Poulsen A.T. Clausen A. Buxens Leif Katsuo Oxenløwe Christophe Peucheret

SIGNAL (programming language)

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Citations (9)

Optical frequency combs for optical fiber communications

APL Photonics (2025)

Leif Katsuo Oxenløwe

Optical frequency combs are analyzed in the context of using them for carrying data in optical fiber communication systems. Combs are analyzed for their data-carrying capacity, i.e., for how much data they can carry, in massively multiplexed systems, and for their transmission reach capabilities, i.e., for how long cables they would be useful sources. The challenge is their limited output power and, hence, the need for amplification, which limits the initial signal-to-noise ratio and, hence, the data capacity they can support. It is shown that currently, available comb sources can individually support multiple Pbit/s in short multiplexed links and also support ultra-long-haul reach with performance on par with using high-quality individual lasers. This means that, provided a number of practical solutions for matching and tuning combs, as well as replacing broken comb sources swiftly, are developed, amplified optical frequency combs could perform very well as replacements for banks of individual lasers in optical networks.

10.1063/5.0220794

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Four-Wave Mixing in Silicon-Rich Nitride Waveguides

Frontiers in Optics (2015)

Miranda Mitrovic Xiaowei Guan Hua Ji Leif Katsuo Oxenløwe Lars H. Frandsen

We demonstrate four-wave mixing wavelength conversion in silicon-rich nitride waveguides which are a promising alternative to silicon for nonlinear applications. The obtained conversion efficiency reaches -13.6 dB while showing no significant nonlinear loss.

Four-wave mixing

Waveguide

Frequency Conversion

10.1364/fio.2015.fm1d.6

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Citations (8)

Field Transmission Performance of Multi-core and Few-Mode Fibers

Optical Fiber Communication Conference (OFC) 2022 (2024)

Cristian Antonelli Antonio Mecozzi Andrea Marotta Fabio Graziosi Giammarco Di Sciullo

This presentation reviews accumulated knowledge on the performance of field-deployed fibers for spatially multiplexed transmission. These are multi-core and few-mode fibers deployed in the Italian city of L'Aquila as part of the INCIPICT testbed for space-division multiplexing.

Mode (computer interface)

10.1364/ofc.2024.w3j.1

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Time-domain optical Fourier transformation for OTDM-DWDM and DWDM-OTDM conversion

Hans Christian Hansen Mulvad E. Palushani Michael Galili Hao Hu H. Ji

Applications of time-domain optical Fourier transformation (OFT) in ultra-high-speed optical time-division multiplexed systems (OTDM) are reviewed, with emphasis on the recent demonstrations of OFT-based conversion between the OTDM and DWDM formats.

Time-division multiplexing

10.1109/ipoc.2011.6122864

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Citations (3)

Metasurfaces for generating high-order optical angular momentum modes

Yaoxin Liu Toshio Morioka Leif Katsuo Oxenløwe Andrei V. Lavrinenko Radu Malureanu

10.46620/ursiatrasc24/xlmn5662

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IEEE Photonics Technology Letters publication information

IEEE Photonics Technology Letters (2022)

A. Kasukawa M Mashanovitch Leif Katsuo Oxenløwe M Sander Gabriella Bosco

10.1109/lpt.2022.3178564

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