研究目的
Investigating the generation of interwoven frequency combs with insertion of an intracavity Fabry–Pérot in a mode-locked laser and exploring the effects of a low ?nesse intracavity Fabry–Pérot in a laser cavity as a passive element of a mode-locked laser.
研究成果
The insertion of a Fabry–Pérot etalon in a mode-locked laser cavity generates interwoven frequency combs with properties influenced by the laser cavity's dynamics rather than just the material dispersion. This setup offers a novel method for controlling frequency combs and has potential applications in sensing and metrology.
研究不足
The study is limited by the passive adjustment mechanism of the interwoven comb to cavity parameters, which may not be as precise as active stabilization methods. Additionally, the sensitivity to changes in index of refraction is high but may be affected by environmental factors.
1：Experimental Design and Method Selection:
The study involves the insertion of a low ?nesse Fabry–Pérot etalon into a mode-locked laser cavity to generate interwoven frequency combs. The methodology includes theoretical models to explain the resonance conditions and pulse dynamics within the cavity.
2：Sample Selection and Data Sources:
The experiment uses a linear Ti:sapphire laser cavity with a 15.119 mm thick fused silica Fabry–Pérot etalon. Data on pulse trains and frequency combs are collected using photodiodes and spectrum analyzers.
3：119 mm thick fused silica Fabry–Pérot etalon. Data on pulse trains and frequency combs are collected using photodiodes and spectrum analyzers.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: The setup includes a mode-locked Ti:sapphire laser, a Fabry–Pérot etalon, photodiodes (Newport model 1437), and a rubidium 87 cell for wavelength tuning verification.
4：Experimental Procedures and Operational Workflow:
The Fabry–Pérot etalon is inserted into the laser cavity at various tilt angles to observe the generation of pulse trains and the restructuring of the frequency comb. The output is monitored for changes in repetition rates and pulse characteristics.
5：Data Analysis Methods:
The data are analyzed to understand the coupling between the etalon and laser cavity modes, the adjustment of pulse envelope velocities, and the formation of interwoven combs.
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