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

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Widely tunable dual-wavelength waveguide-based optical parametric oscillator.

Maximilian Timmerkamp, Ming Gao, Carsten Fallnich

|August 13, 2025

Summary

This summary is machine-generated.

We developed a tunable dual-wavelength optical parametric oscillator (OPO) using silicon nitride waveguides. This device generates two independently tunable idler pulses, enabling flexible multi-wavelength applications.

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Area of Science:

Photonics
Nonlinear Optics
Integrated Optics

Background:

Optical parametric oscillators (OPOs) are crucial for generating tunable laser light.
Silicon nitride (SiN) waveguides offer excellent nonlinear properties for integrated photonic devices.

Purpose of the Study:

To demonstrate a widely tunable dual-wavelength optical parametric oscillator (OPO) in a single silicon nitride waveguide.
To achieve independent tuning of two idler outputs for versatile multi-wavelength generation.

Main Methods:

Utilized degenerate four-wave mixing within both fundamental TE and TM modes of a SiN waveguide.
Employed a tunable birefringence within the cavity for independent dispersive tuning of idler outputs.
Implemented an orthogonally polarized and delayed pumping scheme.

Main Results:

Generated two independently tunable idler pulses with arbitrary frequency spacing up to 65 THz.
Achieved tuning in the wavelength region from 1.11 to 1.46 µm.
Demonstrated broadband four-wave mixing gain from fundamental waveguide modes.

Conclusions:

The developed dual-wavelength waveguide-based OPO is a novel platform for multi-wavelength applications.
This technology enables flexible and independent control over generated optical frequencies.
Paves the way for advancements in spectroscopy, sensing, and optical communications.