To realize a stable SLM operation o

To realize a stable SLM operation of the fiber laser, different styles have been
implemented.
The ring fiber laser [11,12] is rather complex and expensive systems with hardly achievable wavelength stability. At the same time, it needs ultra-narrow BPF and has low output power and slope efficiency. Short linear cavity distributed Bragg reflector (DBR) fiber laser [13] or the DFB fiber laser can overcome these problems above [14].
They have simple, robust, and compact structure providing operation without longitude mode hopping. However, they need high concentration and gain of active optical fiber. Spiegelberg et al. have reported DBR laser emission around 1550nm in Er/Yb co-doped phosphate glass fiber [13]. However, the Er/Yb co-doped phosphate glass fiber with photosensitivity is very expensive and the spliced joints between the two different fibers may cause high loss and mechanical fragility, because phosphate and silica glasses have different optical,mechanical, and thermal properties. Since the ordinary EDF has low doped concentration and gain, in this paper, the methods of enlarging the effective area and multi-compound doped are proposed to increase the erbium-doped concentration and gain of the active fiber core.

結果 (中文) 1:

为了实现光纤激光器的 SLM 运行稳定，不同款式过了实施。环形光纤激光器 [11，12] 是相当复杂和昂贵的系统难以实现波长稳定性。同时，它需要超窄带通滤波器，并具有低输出功率和斜效率。短线性腔分布布拉格反射 （DBR） 光纤激光器 [13] 或 DFB 光纤激光器可以克服上述问题 [14]。它们有简单、 鲁棒性，和紧凑的结构运作提供没有经度模式跳来跳去。然而，他们需要高度集中和源光纤的增益。施 et al.有报道 DBR 激光器周围 1550nm 铒镱共掺的磷酸盐玻璃光纤 [13]。然而，是非常昂贵的铒镱共掺的磷酸盐玻璃光纤的光敏性和搭接的接头之间两种不同的纤维可能导致高损耗和机械的脆弱性，因为磷和硅玻璃具有不同的光学、 机械和热特性。由于普通 EDF 具有低掺杂的浓度和增益，在本文中，扩大的有效面积和多复合掺杂的方法拟增加铒掺杂浓度和增益的有源光纤核心。

結果 (中文) 3:

实现了光纤激光器稳定SLM操作，不同风格已经实现

。环形光纤激光器[11,12]是相当复杂和昂贵的和难以实现的波长稳定系统。同时，它需要超窄的带通滤波器和具有较低的输出功率和斜率效率。短直腔分布布拉格反射镜（DBR）光纤激光器[ 13 ]或DFB光纤激光器可以克服上述问题[ 14 ]。
有简单，鲁棒性，和紧凑的结构，提供操作没有经度模式跳跃。然而，他们需要高浓度的活性光纤增益。施皮格伯格等人。已报道的DBR激光器发射在铒镱共掺磷酸盐玻璃光纤1550nm [ 13 ]。然而，铒镱共掺磷酸盐玻璃光纤的光敏性是非常昂贵的，拼接接头的两种不同纤维之间可能会导致高损失和机械的脆弱性，因为磷硅玻璃具有不同的光学，机械，和热性能。由于普通EDF具有较低的掺杂浓度和增益，在本文中，该方法的有效面积扩大和多元复合掺杂了掺铒浓度的增加和活性纤维芯增益。