In this Letter, we report lasing at 2.3 µm in ${\text{Tm}^{3 +}}$-single-doped and ${\text{Tm}^{3 +}}/{\text{Ho}^{3 +}}$-codoped fluorotellurite glass microsphere resonators. By employing a 793 nm diode laser as a pump and exploiting whispering gallery mode microresonators (WGMRs), dual-wavelength lasing at 1.9 and 2.3 µm and triple-wavelength lasing at 1.9, 2.07, and 2.3 µm are achieved in ${\text{Tm}^{3 +}}$-doped and ${\text{Tm}^{3 +}}/{\text{Ho}^{3 +}}$-codoped microspheres, respectively. The introduction of ${\text{Ho}^{3 +}}$ ions significantly reduces the lasing threshold of ${\text{Tm}^{3 +}}$ at 2.3 µm because of energy transfer.

中文翻译：

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掺有Tm3 +的氟铁矿玻璃微球谐振器激光器的波长为2.3 µm。

在这封信中，我们报告了$ {\ text {Tm} ^ {3 +}} $ -单掺杂和$ {\ text {Tm} ^ {3 +}} / {\ text {Ho} ^ {3 +}} $-共掺杂的氟碲酸盐玻璃微球谐振器。通过使用793 nm二极管激光器作为泵浦并利用回音壁模式微谐振器（WGMR），可以在$ {\ text {中实现1.9和2.3 µm的双波长激光和1.9、2.07和2.3 µm的三波长激光。Tm} ^ {3 +}} $掺杂的微球和$ {\ text {Tm} ^ {3 +}} / {\ text {Ho} ^ {3 +}} $掺杂的微球。由于能量转移，引入$ {\ text {Ho} ^ {3 +}} $离子显着降低了$ {\ text {Tm} ^ {3 +}} $在2.3 µm时的激射阈值。