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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Multi-wavelength switchable erbium-doped fiber laser based on a hybrid filter incorporating a bi-tapered Mach-Zehnder interferometer and Sagnac loop
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Multi-wavelength switchable erbium-doped fiber laser based on a hybrid filter incorporating a bi-tapered Mach-Zehnder interferometer and Sagnac loop

机译：基于混合滤波器的多波长可切换铒掺杂光纤激光器，其结合了双锥形Mach-Zehnder干涉仪和SAGNAC环路

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摘要

A multi-wavelength switchable C-band erbium-doped fiber laser based on a hybrid comb filter composed of a Sagnac loop and Mach-Zehnder interferometer (MZI) is designed and experimentally demonstrated. In the designed ring cavity fiber laser, the MZI is composed of bi-tapered single-mode fiber fabricated by etching with hydrofluoric acid. In the experiment, the wavelength intervals in the comb spectra of the Sagnac loop and MZI are 3.4 and 18.8 nm, respectively, and by combining the Sagnac loop and MZI, measurements of the hybrid comb spectrum are obtained. When the pump power is 91 mW, lasing occurs at 1529.2 nm. Adjustment of the variable attenuator (VA) can provide 1541.9 and 1558.6 nm single-wavelength switchable lasers, for which the maximum peak power difference is less than 3.59 dB, the signal-to-noise ratio (SNR) exceeds 19.25 dB, and the peak power fluctuation is less than 0.34 dB over a 30 min scan time at 26 degrees C. For dual-wavelength switchable laser emission, four different sets of wavelengths can be realized, and the SNR exceeds 15.57 dB with power fluctuations of less than 1.6 dB, under the same monitoring conditions. By further adjusting the VA, stable and tunable triple-wavelength lasing is also realizable; under these conditions, the SNR exceeds 15.02 dB and the power fluctuation is less than 0 91 dB. Furthermore, four- and five-wavelength lasing can also be achieved by adjusting the VA again, with SNRs exceeding 19.05 and 14.98 dB, respectively.
机译：设计了一种基于混合梳状滤波器的多波长可切换的C波段掺铒光纤激光器，并设计并实验证明了由SAGNAC环和Mach-Zehnder干涉仪（MZI）组成的混合梳状滤波器。在设计的环形腔光纤激光器中，MZI由双锥形单模纤维组成，通过用氢氟酸蚀刻而制造。在实验中，SAGNAC环和MZI的梳状光谱中的波长间隔分别为3.4和18.8nm，并且通过组合锯齿环环和MZI，获得混合梳谱的测量。当泵功率为91兆瓦时，激光发生在1529.2nm。可变衰减器（VA）的调整可以提供1541.9和1558.6 nm单波长可切换激光器，最大峰值功率差小于3.59 dB，信噪比（SNR）超过19.25 dB，峰值在26摄氏度下，功率波动小于0.34dB。对于双波长可切换激光发射，可以实现四组不同的波长，SNR超过15.57 dB，功率波动小于1.6 dB，在相同的监测条件下。通过进一步调节VA，还可以实现稳定和可调谐的三倍波长激光;在这些条件下，SNR超过15.02 dB，功率波动小于0 91 dB。此外，还可以通过再次调节VA来实现四个和五波长激光，SNR分别超过19.05和14.98dB。

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