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Updated: Feb 1, 2026
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Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
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Quantum-induced coherence imaging with a long interference region.
Optics Letters
|January 30, 2026
Summary
Zou-Wang-Mandel (ZWM) quantum-induced coherence imaging is enhanced by seed injection (SI). This method extends the interference region from micrometers to centimeters, enabling high-visibility, long-distance imaging.
Area of Science:
- Quantum optics
- Nonlinear optics
- Quantum imaging
Background:
- Zou-Wang-Mandel (ZWM) quantum-induced coherence enables high-sensitivity detection and imaging.
- Current limitations include a restricted interference region due to parametric down-conversion (PDC) coherence length.
- Signal path determination is challenging due to idler path overlapping.
Purpose of the Study:
- To extend the interference region of ZWM quantum-induced coherence imaging systems.
- To improve fringe visibility and enable long-distance, high-coherence imaging.
- To overcome the limitations of short coherence lengths in PDC photons.
Main Methods:
- Implementation of seed injection (SI) at the idler's frequency.
- Utilizing SI to increase the interference region of the quantum-induced coherence system.
- Maintaining noise resistance and no coincidence count requirements.
Main Results:
- The interference region was successfully extended from micrometers to centimeters.
- Brighter fringes were observed, indicating enhanced interference.
- The system demonstrated potential for high-coherence, long-distance, and high-visibility imaging.
Conclusions:
- Seed injection significantly enhances ZWM quantum-induced coherence imaging systems.
- The proposed method overcomes coherence length limitations, enabling centimeter-scale interference.
- This advancement offers improved performance for sensitive detection and imaging applications.
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