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arXiv 2103.05178physics.optics
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超高OSNR、Sub-kHz线宽和极高稳定性的全保偏单纵模光纤Laser

All-Polarization Maintaining Single-Longitudinal-Mode Fiber Laser with Ultra-High OSNR, Sub-kHz Linewidth and Extremely High Stability

Zhengkang Wang, Jianming Shang, Siqiao Li, Kuanlin Mu, Song Yu, Yaojun Qiao

摘要:

提出并实验研究了一种具有超高光信噪比、超窄线宽和极高稳定性的全保偏单纵模掺铒光纤激光器。设计了一种由两个单耦合器光纤环和一段未抽运的掺铒光纤饱和吸收滤波器组成的双环无源子环谐振器(DR-PSR),并将其应用于掺铒光纤激光器中,作为有效的SLM选择元件,保证了SLM激光输出的优良性能。全相位调制结构使掺铒光纤激光器具有较强的抗环境干扰能力。在泵浦功率为100 mW时,获得了83 dB的超高OSNR和459 Hz的超窄线宽。对于SLM操作,全PM EDFL在波长激射和输出功率方面都具有出色的稳定性能。中心波长和输出功率的最大波动分别为0.012nm和0.01dB。

英文摘要:

An all-polarization maintaining (PM) single-longitudinal-mode (SLM) erbium-doped fiber laser (EDFL) with ultra-high optical signal-to-noise ratio (OSNR), ultra-narrow linewidth and extremely high stability is proposed and experimentally demonstrated. A double-ring passive subring resonator (DR-PSR) composed of two single-coupler fiber rings and a length of unpumped EDF-based saturable absorber filter is designed and employed in the EDFL to serve as the efficient SLM selecting element to guarantee SLM lasing with excellent output performance. The all-PM structure enables the proposed EDFL to present strong ability to resist the environment disturbance. At the pump power of 100 mW, we obtain an SLM EDFL with an ultra-high OSNR of 83 dB and an ultra-narrow linewidth of 459 Hz. For the SLM operation, the all-PM EDFL processes outstanding stability performance of both the wavelength lasing and the output power. The maximum fluctuations of the center wavelength and output power are 0.012 nm and 0.01 dB.

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