A gain-switched pulsed laser based on a commercial, heavily holmium-doped fluoroindate glass fiber, is designed to emit in the middle-infrared range, at the wavelength $\boldsymbol{\lambda } = 3.92\ {\boldsymbol{\mu } \bf{ m}}$ . The laser, pumped at ${\boldsymbol{\lambda }} = 888{\bf{\ nm}}$ , is modeled by a six-level system, by taking into account experimental spectroscopic parameters, to identify a feasible laser configuration. An output signal peak power of about ${\boldsymbol{P}}_{\boldsymbol{s}}^{{\boldsymbol{peak}}} = 14.62{\bf{\ W}}$ with a full width at half maximum (FWHM) pulse duration less than ${{\boldsymbol{\tau }}_{\boldsymbol{s}}} = 73\ {\boldsymbol{ns}}$ and pulse energy ${{\boldsymbol{E}}_{\boldsymbol{s}}} = 1.214\ {\boldsymbol{\mu } \bf {J}}$ is predicted, by considering an input peak power of ${\boldsymbol{P}}_{\boldsymbol{p}}^{{\boldsymbol{peak}}} = 10{\bf{\ W}}$ , and pump repetition rate of ${\boldsymbol{f}} = 100{\bf{\ kHz}}$ , by employing a 8 cm-long fluoroindate fiber with holmium concentration ${{\boldsymbol{N}}_{{\boldsymbol{Ho}}}} = 100\ 000{\bf{\ ppm}}$ . The obtained result encourages the construction of a pulsed laser based on commercially available optical fiber, for applications in different fields as sensing and biomedicine.

中文翻译：

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基于掺Ho ^3+的氟酸盐光纤的波长为3.92μm的增益转换脉冲激光器的数值设计

基于重掺杂ped的氟化工业玻璃光纤的商业化增益转换脉冲激光器被设计为在波长范围的中红外范围内发射 $ \ boldsymbol {\ lambda} = 3.92 \ {\ boldsymbol {\ mu} \ bf {m}} $ 。激光，在$ {\ boldsymbol {\ lambda}} = 888 {\ bf {\ nm}} $ 由六级系统建模，并考虑到实验光谱参数，以识别可行的激光配置。输出信号的峰值功率约为$ {\ boldsymbol {P}} _ {\ boldsymbol {s}} ^ {{\ boldsymbol {peak}}} = 14.62 {\ bf {\ W}} $ 半高全宽（FWHM）脉冲持续时间小于 $ {{\ boldsymbol {\ tau}} _ {\ boldsymbol {s}}} = 73 \ {\ boldsymbol {ns}} $ 和脉冲能量 $ {{\ boldsymbol {E}} _ {\ boldsymbol {s}}} = 1.214 \ {\ boldsymbol {\ mu} \ bf {J}} $ 通过考虑输入峰值功率来预测 $ {\ boldsymbol {P}} _ {\ boldsymbol {p}} ^ {{\\ boldsymbol {peak}}} = 10 {\ bf {\ W}} $ ，以及泵的重复率 $ {\ boldsymbol {f}} = 100 {\ bf {\ kHz}} $ ，通过使用8浓度为8厘米长的氟代纤维 $ {{\ boldsymbol {N}} _ {{\ boldsymbol {Ho}}}}} = 100 \ 000 {\ bf {\ ppm}} $ 。所获得的结果促进了基于可商购的光纤的脉冲激光器的构造，用于在传感和生物医学等不同领域中的应用。