Active breathing pulses induced by the periodic loss in a passive mode-locked laser.

IF 3.1 2区 物理与天体物理 Q2 OPTICS
Optics letters Pub Date : 2025-04-01 DOI:10.1364/OL.554512
Jialong Feng, Zhenzhu Zhang, Jiajun Wei, Yueqing Du, Chao Zeng, Dong Mao, Jianlin Zhao
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Abstract

The breather is an important emerging topic in nonlinear optics. In fiber lasers, the breather is generally achieved by tuning the loss of the laser system to search for the proper Hopf-bifurcation route. Here, we propose a simple and reliable method to generate breathing pulses, i.e., to introduce a controlled periodic transmittance, i.e., a periodic loss, within the laser that drives the mode-locked pulses to produce a synchronous periodic evolution. Therefore, we name this type of pulse as active breathing pulses. Experimental results show that the characteristic parameters of the active breathing pulses, e.g., the breathing ratio and breathing frequency, can be accurately controlled by the modulation depth and modulation frequency of the periodic transmittance introduced by the electro-optical modulator (EOM). Numerical simulations can reproduce the experimental phenomena. Our work not only gives a new, to the best of our knowledge, approach to modulate the characteristics of the breather but is also promising for the discovery of novel Hopf-bifurcation phenomena and soliton patterns in a periodically varying system.

喘振是非线性光学中一个重要的新兴课题。在光纤激光器中,呼吸通常是通过调整激光系统的损耗来寻找合适的霍普夫分叉路径实现的。在这里,我们提出了一种简单可靠的方法来产生呼吸脉冲,即在激光器中引入受控的周期性透射率,也就是周期性损耗,从而驱动锁模脉冲产生同步的周期性演化。因此,我们将这种脉冲命名为主动呼吸脉冲。实验结果表明,主动呼吸脉冲的特征参数,如呼吸比和呼吸频率,可以通过电光调制器(EOM)引入的周期性透射的调制深度和调制频率来精确控制。数值模拟可以再现实验现象。据我们所知,我们的工作不仅提供了一种调制呼吸器特性的新方法,而且有望在周期性变化的系统中发现新的霍普夫分岔现象和孤子模式。
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来源期刊
Optics letters
Optics letters 物理-光学
CiteScore
6.60
自引率
8.30%
发文量
2275
审稿时长
1.7 months
期刊介绍: The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community. Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.
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