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Related Experiment Video

Updated: Jul 2, 2025

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Efficient, high-power, narrow-linewidth, continuous-wave quantum-dot semiconductor comb laser.

Mikhail Buyalo¹, Alexey Gubenko¹, Sergey Mikhrin¹

¹Innolume GmbH, Dortmund, Germany.

Scientific Reports

|February 20, 2024

Summary

This summary is machine-generated.

We developed a new O-band quantum-dot semiconductor laser for optical interconnects. This laser offers a wide bandwidth and high power, enabling efficient wavelength division multiplexing (WDM) applications.

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Last Updated: Jul 2, 2025

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

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Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Published on: April 24, 2014

Area of Science:

Photonics
Semiconductor Lasers
Optical Communications

Background:

Wavelength division multiplexing (WDM) is crucial for high-capacity optical interconnects.
Quantum-dot semiconductor lasers offer potential for compact and efficient WDM light sources.

Purpose of the Study:

To develop a continuous-wave, O-band quantum-dot semiconductor comb laser.
To evaluate its performance for WDM optical interconnects.

Main Methods:

Fabrication of a quantum-dot semiconductor laser.
Characterization of optical bandwidth, comb spacing, power conversion efficiency, output power, noise, linewidth, and fiber coupling.

Main Results:

Achieved 2.2 THz optical bandwidth with 89 comb wavelengths at 25 GHz spacing.
Demonstrated >30% peak electrical-to-optical power conversion efficiency and up to 270 mW usable power.
Exhibited low relative intensity noise (< -135 dB/Hz), narrow mode linewidth (140 kHz), and mode beating linewidth (50 kHz).
Obtained stable far-field output with 75% coupling efficiency to polarization-maintaining fiber.

Conclusions:

The developed quantum-dot semiconductor comb laser is suitable for WDM optical interconnects.
Its performance metrics meet the demands for high-capacity data transmission.
This technology advances the development of efficient and powerful optical communication systems.