Direct electro-optic phase control for carrier-envelope offset frequency stabilization in solid-state lasers
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Summary
We developed a new method for stabilizing laser frequency combs using electro-optic modulators, achieving better performance than traditional pump power control. This technique offers improved carrier-envelope offset frequency stabilization in solid-state lasers.
Area of Science:
- Laser Physics
- Quantum Optics
- Nonlinear Optics
Background:
- Carrier-envelope offset frequency (f_ceo) stabilization is crucial for mode-locked lasers.
- Current methods using pump power control have limited bandwidth due to gain medium response times.
Purpose of the Study:
- To present and validate a novel approach for f_ceo stabilization in solid-state lasers.
- To leverage the linear electro-optic effect for direct control of carrier-envelope phase evolution.
Main Methods:
- Implementation of a lithium niobate electro-optic modulator (EOM) in a Kerr-lens mode-locked Cr:ZnS laser.
- Directly controlling carrier-envelope phase evolution via the electro-optic effect.
Main Results:
- EOM-based f_ceo stabilization demonstrated superior performance (6.6 mrad phase noise) compared to pump-modulation (7.6 mrad).
- Identified a bandwidth limitation due to piezoelectric-induced acoustic resonance in the EOM.
Conclusions:
- Electro-optic modulation offers a promising, faster alternative for f_ceo stabilization in solid-state lasers.
- Understanding and mitigating piezoelectric resonances is key for optimizing EOM performance.