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40 GHz continuous, precise, and low power-loss laser frequency sweep using an electro-optic modulator.
Optics Express
|May 15, 2020
Summary
This study introduces a robust laser frequency sweeping technique. It enables precise, wide-range frequency sweeps without complex equipment, offering a reliable method for laser tuning.
Area of Science:
- Laser Physics
- Optical Engineering
- Quantum Optics
Background:
- Precise laser frequency control is crucial for various scientific applications.
- Existing laser sweeping techniques often involve complex setups, high power loss, or limitations in sweep range and reliability.
Purpose of the Study:
- To develop and demonstrate a novel, robust, and wide-range laser frequency sweeping technique.
- To overcome the limitations of current laser sweeping methods.
Main Methods:
- A slave laser's modulation sideband is phase-locked to a master laser using an electro-optic modulator.
- The slave laser's carrier frequency is swept by adjusting the modulation frequency.
- The technique avoids beat signal detection and the need for a frequency comb.
Main Results:
- Successfully demonstrated a laser frequency sweep of 20 GHz for an 852 nm laser.
- Confirmed a continuous frequency sweep of 40 GHz for a second harmonic 426 nm laser.
Conclusions:
- The proposed technique offers a robust and reliable method for precise and wide-range laser frequency sweeping.
- This method eliminates the need for high-frequency beat signal detection and frequency combs, reducing complexity and power loss.
