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In-phase and antiphase self-intensity regulated dual-frequency laser using two-photon absorption
Optics Letters
|May 14, 2016
Summary
Researchers reduced resonant intensity noise in dual-frequency lasers by 25 dB. A two-photon absorber effectively lowered in-phase noise, while spatial separation addressed antiphase noise for ultra-low noise lasers.
Area of Science:
- Optics and Photonics
- Laser Physics
- Quantum Optics
Background:
- Dual-frequency solid-state lasers are crucial for telecommunication wavelengths.
- Intensity noise in these lasers limits performance.
- Existing methods for noise reduction are insufficient.
Purpose of the Study:
- To experimentally demonstrate significant noise reduction in dual-frequency solid-state lasers.
- To investigate the effectiveness of a two-photon absorber in mitigating resonant intensity noise.
- To explore methods for reducing both in-phase and antiphase noise components.
Main Methods:
- Utilizing a dual-frequency solid-state laser operating at telecommunication wavelengths.
- Incorporating an intracavity two-photon absorber acting as a buffer reservoir.
- Implementing a slight spatial separation of the two modes within the nonlinear absorber.
Main Results:
- Achieved a 25 dB reduction in resonant intensity noise spectra.
- The two-photon absorber efficiently reduced in-phase noise contributions.
- Spatial separation of modes partially reduced antiphase noise contributions.
Conclusions:
- A novel approach for designing ultra-low noise dual-frequency solid-state lasers has been presented.
- Intracavity two-photon absorbers are effective for in-phase noise reduction.
- Mode spatial separation offers a strategy for tackling antiphase noise.
