Chen Hongling, Zhang Peixiong, Song Jiawan, Yin Hao, Hang Yin, Yang Qiguo, Li Zhen, Chen Zhenqiang
Opt Express. 2022 Jun 6;30(12):21943-21951. doi: 10.1364/OE.461795.
A broader emission band of the novel Nd: CaYGdAlO (Nd: CYGA) mixed crystal was proved by the introduction of Gd ions in Nd: CaYAlO (Nd: CYA) crystal, and a diode-pump tunable Nd: CYGA laser operation was achieved successfully. Due to the broad emission spectrum with the full width at half maximum (FWHM) of 23 nm, a tuning range of 32 nm from 1075 nm to 1107 nm was achieved, and the results were considered to be the first time for Nd-doped crystals to be tuned to such a long wavelength at 1107 nm, which promotes the further development of near-infrared tunable lasers. The maximum output power was 1.05 W at the center wavelength of 1081.4 nm, corresponding to the slope efficiency of 26.6%. Furthermore, we also demonstrated a continuous-wave 1105 nm laser with the output power of 53 mW. Our work indicates that Nd: CYGA crystal is a potential Nd-doped gain medium for generating all-solid-state near-infrared lasers.
钙钇铝石榴石（Nd：CYA）晶体中引入钆离子，证明了新型钕：钙钇钆铝石榴石（Nd：CYGA）混晶具有更宽的发射带，并成功实现了二极管泵浦可调谐Nd：CYGA激光运转。由于发射光谱半高宽（FWHM）为23nm，实现了从1075nm到1107nm的32nm调谐范围，该结果被认为是掺钕晶体首次被调谐到1107nm这样的长波长，这推动了近红外可调谐激光器的进一步发展。在中心波长1081.4nm处的最大输出功率为1.05W，对应的斜率效率为26.6%。此外，我们还展示了输出功率为53mW的连续波1105nm激光器。我们的工作表明，Nd：CYGA晶体是用于产生全固态近红外激光器的潜在掺钕增益介质。
