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Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
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Performing MHz-Level Repetition Rate Tuning for Coherent Dual-Microcomb Interferometry
Enqi Yan1, Mingliang Peng1, Jian Tang1
1College of Intelligence Science and Technology, National University of Defense Technology, Changsha 410073, China.
Micromachines
|April 26, 2025
Summary
This study presents a novel method for tuning microcomb repetition rates, crucial for high-precision dual-microcomb interferometry. This advancement enhances measurement speed and precision in applications like spectroscopy and ranging.
Area of Science:
- Optics and Photonics
- Precision Measurement
- Laser Technology
Background:
- Dual-microcomb interferometry offers high precision and speed for spectroscopy and ranging.
- Tuning microcomb repetition rates is essential for optimizing dual-microcomb systems and improving measurement performance.
Purpose of the Study:
- To demonstrate a coherent dual-microcomb system with tunable repetition rates.
- To enable MHz-level repetition rate tuning for enhanced dual-comb applications.
Main Methods:
- Utilized a single continuous-wave fiber laser at 1560.49 nm to drive the dual-microcomb system.
- Employed a hybrid tuning approach combining single-sideband (SSB) modulation for precision pump frequency control and thermal control for coarse tuning.
- Achieved continuous repetition rate tuning over a 4.34 MHz range.
Main Results:
- Demonstrated a linear relationship between repetition rate and pump modulation frequency with a coefficient of 143.58 kHz/GHz.
- Enabled MHz-level repetition rate tuning, significantly easing microresonator fabrication and pairing requirements.
- Showcased the system's potential for advanced spectroscopy and high-speed ranging.
Conclusions:
- The developed hybrid tuning method provides precise and flexible control over microcomb repetition rates.
- This advancement is highly valuable for applications in gas detection, satellite formation flying, and other precision measurement fields.
- The ability to tune repetition rates relaxes constraints, paving the way for more accessible and performant dual-microcomb systems.
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