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Updated: Jan 16, 2026

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

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Published on: August 12, 2013

Optical arbitrary waveform generation (OAWG) using actively phase-stabilized spectral stitching.

Daniel Drayss^1,2,3, Dengyang Fang^4,5, Alban Sherifaj⁴

¹Institute of Photonics and Quantum Electronics (IPQ), Karlsruhe Institute of Technology (KIT), 76131, Karlsruhe, Germany. daniel.drayss@kit.edu.

Light, Science & Applications

|September 29, 2025

Summary

This summary is machine-generated.

Researchers developed a new optical arbitrary waveform generation (OAWG) method using spectrally sliced technology with active phase stabilization. This breakthrough enables the synthesis of ultra-broadband arbitrary optical waveforms for advanced optical communications.

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Area of Science:

Photonics
Optical Communications
Signal Processing

Background:

Conventional optical waveform generation is limited by electronic component bandwidth, particularly digital-to-analog converters (DACs).
Optical arbitrary waveform generation (OAWG) overcomes this by combining spectral slices, but phase control between slices is challenging.

Purpose of the Study:

To propose and demonstrate a spectrally sliced OAWG system with active phase stabilization.
To enable targeted synthesis of truly arbitrary optical waveforms with unprecedented bandwidths.

Main Methods:

Utilizing spectrally sliced OAWG with active phase stabilization.
Synthesizing individual optical spectral slices using multiple in-phase and quadrature (IQ) modulators and DACs.
Combining these slices to form a single ultra-broadband optical waveform.

Main Results:

Successfully synthesized optical waveforms with record bandwidths up to 325 GHz.
Demonstrated the generation of 32QAM data signals at 320 GBd symbol rates.
Achieved excellent signal quality after transmitting over 87 km of single-mode fiber.

Conclusions:

The proposed spectrally sliced OAWG with active phase stabilization overcomes previous limitations in arbitrary optical waveform synthesis.
This technology has the potential to significantly advance high-speed optical communications, photonic-electronic DACs, and test and measurement applications.