All-fiber multimode interferometer for the generation of a switchable multi-wavelength thulium-doped fiber laser

Ahmad H.; Sharbirin A. S.; Samion M. Z.; Ismail M. F.

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All-fiber multimode interferometer for the generation of a switchable multi-wavelength thulium-doped fiber laser

机译：全纤维多模干涉仪，用于产生可切换多波长分子掺杂光纤激光器

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A compact all-fiber multimode interferometer (MMI) designed to produce a switchable multi-wavelength thulium-doped fiber laser (TDFL) is proposed and demonstrated. The TDFL fiber ring cavity employs a 60-cm-long multimode fiber into the cavity to induce multimode interference and provide intensity-dependent loss in order to generate a multi-wavelength output. The suppression of mode competition and the overall stability of the TDFL are further improved by exploiting the filtering capability of a Sagnac loop. By increasing the pump power, a switchable wavelength output is allowed with a wavelength spacing of similar to 1.8 nm. At 361 mW input pump power, nine laser lines are generated, with a maximum signal-to-noise ratio value of similar to 36 dB and an output power of 3.3 mW. The multi-wavelength TDFL also exhibits great stability in one-hour operation with a wavelength drift of 0.2 nm. The proposed multi-wavelength TDFL has potential to be employed in future thulium-doped fiber amplifier-based telecommunication infrastructure and also may be applicable in areas such as sensing and spectroscopy, largely associated with its 2 mu m wavelength output. (C) 2017 Optical Society of America

机译：提出并证明了设计用于产生可切换多波长掺杂光纤激光器（TDFL）的紧凑型全光纤多模干涉仪（MMI）。 TDFL纤维环腔采用60cm长的多模光纤进入腔中以诱导多模干扰，并提供强度相关的损耗，以产生多波长输出。通过利用SAGNAC环路的滤波能力，进一步提高了模式竞争的抑制和TDFL的整体稳定性。通过增加泵功率，允许可切换波长输出，其波长间距类似于1.8nm。在361 MW输入泵电源下，产生九个激光线，具有与36 dB类似的最大信噪比和3.3mW的输出功率。多波长TDFL在一小时操作中也表现出极高的稳定性，其波长漂移为0.2nm。所提出的多波长TDFL具有在未来的基于远程掺杂光纤放大器的电信基础设施中使用的潜力，并且还可以应用于诸如感测和光谱的区域，并且在很大程度上与其2μM波长输出相关联。（c）2017年光学学会

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《Applied optics》 |2017年第21期|共6页
作者
Ahmad H.; Sharbirin A. S.; Samion M. Z.; Ismail M. F.;
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Univ Malaya Photon Res Ctr Kuala Lumpur 50603 Malaysia;

Univ Malaya Photon Res Ctr Kuala Lumpur 50603 Malaysia;

Univ Malaya Photon Res Ctr Kuala Lumpur 50603 Malaysia;

Univ Malaya Photon Res Ctr Kuala Lumpur 50603 Malaysia;

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All-fiber multimode interferometer for the generation of a switchable multi-wavelength thulium-doped fiber laser

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