Related Experiment Video
Updated: Oct 24, 2025
09:23
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
14.7K
Mid-infrared frequency comb with 25 pJ threshold via CW-seeded optical parametric generation in nonlinear waveguide.
Optics Letters
|August 13, 2021
Summary
We achieved efficient mid-infrared frequency comb generation using a novel optical parametric process. This method offers ultra-low threshold and low noise, enabling broader bandwidths for advanced applications.
Area of Science:
- Photonics and Optics
- Nonlinear Optics
- Quantum Optics
Background:
- Frequency combs are crucial for precise spectroscopy.
- Generating mid-infrared (mid-IR) frequency combs is challenging.
- Existing methods often require complex setups or have high thresholds.
Purpose of the Study:
- To demonstrate efficient generation of mid-IR frequency combs.
- To achieve a low threshold and high conversion efficiency.
- To explore methods for increasing the mid-IR bandwidth.
Main Methods:
- Continuous-wave-seeded femtosecond optical parametric generation.
- Utilizing nonlinear waveguides for enhanced light-matter interaction.
- Employing supercontinuum generation for broadband pumping.
Main Results:
- Achieved 74% conversion efficiency from near-IR to mid-IR.
- Demonstrated an ultra-low threshold of 25 pJ, over 300x lower than bulk.
- Measured exceptionally low relative intensity noise (<5x10-5).
- Showed potential for increased bandwidth using broadband pumping.
Conclusions:
- Continuous-wave-seeded OPG in nonlinear waveguides is an efficient method for mid-IR frequency comb generation.
- The demonstrated low threshold and noise pave the way for practical mid-IR comb applications.
- Broadband pumping offers a route to wider spectral coverage.
